1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc176c87d3f9d0841536ac225b91226347a01a3a15cefd161474c14f824f03187. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7dff9dc-65c5-4f05-95fb-7ef05c1cf569.json and https://artists.proofprofile.net/proofs/artist/e7dff9dc-65c5-4f05-95fb-7ef05c1cf569.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c30d6b1a08fbfad2f414e69dfb1516788efdc9c714679294f47c2c6f176005. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732103123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8936ea5a43935d6410899da306ee54943cbafa7cf4d62b074074335c072fa13b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732103124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b52cb55a20aa083ee70563586c9203eb48384654fde60eb0ec983c53388753. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732103128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca29cb8c75ddf9f94c8252ef524e399a81c88c2d78f0d71a277d5c0afa04748. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732103129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9181acf2e0ce939159e40d12467867a123521506bd044b9098fb9d44831cd555. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732103130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314769b22849396d3c29ee15f0fec784cc52d258fe585300192dd2340b3c16af. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732102841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4a142183b85c587d2bc4d2ec57c035c7a21a9f107c9a8c264ad6e8b12e63b0. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732102842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8bcc7b0a15f6a44a4a9ca2fb5368732f1e6719ba53eafa75a9d9dbd9a2dfac. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732102843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032ccaaa16418e34e15dac5c260f3c485b85179f4efa1ac85e0f48ba82dc6685. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732102844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12ebb6f42aa7b03aaa4d61336c6ef7291483045b2b19b990c95719e121b5b26. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:26:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732102846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bea9dc193a33ccaf3d4dd9536f2c55556178578632e72a596cdb0ba6d457318. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732105030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed458bc27c145ab2e54667f153bec0e86c81ec01183199b684b73941635da6f3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732105031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1f0506bf8da6189f37bb174ec731710c5e2be7682ed48ba4c7a140cdccef84. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:05:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732105032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf42638539bcefb20a6e9ee0939b4f90130d403dbf852f24a106d66bf667dd6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732105033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b8aef811dbc3813a2c6a80fe10c97895300545539a9db452ee3442b7b61561. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732105034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2862ec29af908da4fec0384f3a2d24887d35000f5292aeac4a849a5228fe276. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732105035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410fe446e43e9d0b063673e7c23dedd20546e2236ef7414293a6d6db3c0af835. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732105023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fae4a42ef2602719d50e185171fe386bb43623feade2645498398c4addf0ba. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732105024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985eb61971ed643bf60d26c02c4eee10014cbc622c58bd3b0f6eec7bb0b473b8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732105026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c88bdb7998a71bafadcce1bdf07e80e6208fe7f3b04aabb04c292238a6a572. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732105027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa711fdb962b46f7144cf63ae5afaff5f6be16ee1f7da2fc4d3455dfb8b64cc61. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732105028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f5dcf436521bc5e00657c9d3c1df15dfd59f3984151b7492e27ff2f14b3d8c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732102459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38aaeb3d4b9c09ca982fff558c819f8d29ec89f5708664d7c5208c051a6f559c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732102466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7fc4fb6106e05ea5d43261207ac8dcaf406fea0cec27061eb2c78e4135b35f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732102467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc8509aec8d17aab7c59abea83ddfa0e7495591fde114c12f18a5c0c03a40ed. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732102468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80788504b06bc811bf9dff8afbb647ef6b58098736b63de39ba4eaccc9aa95ca. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732102474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965203f973b3f80834d10ea948e9ed63b0ae2f81a54c55edc81e300936650245. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732102506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a026c39a81bdc9b3f36991f2523d73b1e64a67fd04a1448187c7b492727f3dd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732105731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13c8b9c507030ee602b53ae367687510821d136a1d6b028694aab6f4d187312. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732105732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0701109743f134a8b15ecee4664670adbf199d65c1699931d7fb519d0ce884a5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732105733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92dbdd1396e5eb97e635a9105a2153a71d5d83c10ad44cb84177ad8668d2619. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732105734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b89df3862292181ebd2f89d96c2e468722af491894dad29bb3bce6faac2dc18. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732105735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2943b00a46a4d3df514ae7364451a09f1085dd88fc3f6996700a3aeac2d6a19b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732105712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d714fc78f7eaa39a4c3f8e231ce4fc8d91fca8db4b4fe0cab4903d23f9489d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732105716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b32edb2550b3bed47435df7db88a74171fa2ead5ee6dabf27f78927b57eb1b0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732105725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4595359dc02464c2aa480d443fb7ddaac91429c22bf7f02b259ea25e8a575170. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732105727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7663f94067227e6809066da07f6cb7d65ca83abea64ab8e57d7d328bd1766d48. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732105729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3d843945e37d0b1b225de3af1d7e6e9c6cb57061249f411069f9e21ee7c2fc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732105730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b3215acd8895819235ed2ba30a1837ca16cc6b07eddf3ee41f27e56aec3597. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKG732104041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32c7ec8e23429d088e90189a10c4e74719447b0b14271f334657125e257bad0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKC371634868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4f42757d519f2a8e48a6d143db5232c69a80c82279869fc91a63e837b7c663. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKC371625366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf67ff948dd992a0a90871d14fbae06b499a47fb625fc8b713c34e32cbc0aef. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKD012426559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa439ee603a25a94b24844481c89a75fae2b17d6729b326e6ce92c3e8f4c98d3a. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKD012426560.