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 0xb49e3d070add503244ca92f0179c488b9d98ac21d106e4139fed916e3399702c. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bba32a8c-1764-4a9e-9afa-1da406662d95.json and https://artists.proofprofile.net/proofs/artist/bba32a8c-1764-4a9e-9afa-1da406662d95.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 0x1fea879ef45d4447f9308f857df077994de941f8217649f777487695ada9e072. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBLFP2429784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45659e5561eaea9e221b28f75b68c35f5fd58128c98b60dd6ea6ccaacc9942b. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/GBMA22321578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca13102d85c65f2d7c6515dc8b9572d5d79574350138ffd1588ca1df9b9c0701. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/GBLFP2392556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d641ac6cb898a601ad21618bd67f47a00f75c9658e516211b8f22c957eadce. 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/QZNWW2207182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90a49c498fec4f1ad427bb92448b4b62b42d3668fe8a96e9cc0a0ec91d72607. 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/QZNWR2265561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2398f47be405a357178bd9cad9197810ba8af50340863b633c63c84e173d2bd0. 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/QZDA82243259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca77cdf033d509d916edeacbe8be2fc280a0e035594584242db9782e4d021c6. 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/QZNWU2101908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4558b03318a9aa121a3eed197c90c89eb419ea60586fb02b0327a2aef709828. 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/QZHN82109172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6ff98839cdba8f437ce164830112c578ed75850fe604ba97388ea5c1d61abf. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/QZHN62130979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebeba9ac8a1c4f38dd1c8489847842c502ecc7bef7fe4f1b4161d5aa734444d1. 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/QZDA42176127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3125145c8c3cf8a636b5076765d6c79aaddefc1b01689f4f9c3d21be2ed57823. 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/QZFZ52144997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf522214e0820aa94fef6b2d1afdc7b4b2eb1d6292541d23a5c971ac969ec98f0. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZNWQ2102477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b0d2a26ff0db397035322092b78d8afdfff072f7c32737fe38e97e8de4f35c. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZNWX2089035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b849a244dcf5473c8c77c625b3c52b62d9e0832c9553af9bdde95def8382e5f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6K2008599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fdf7b3ba52f3c004fa20783dcd2f50e3b1967d9e7af8a74af331ff4af8adda. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QZHN82017108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe715a39c73d3565fc9cdfb3b4339aa392d8ed01d9f6dbd28c5d9b7b4a7aa0a32. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZHN82016814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd3ea0cb58eaace28fd8f07ec6ed1dff81dc2a2c53434e5a486fa5aa7718220. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZHN82017110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb8d319a786fa7ce42bff7a5e6d86a7666041235405b3f0d0fc869ace28136e. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZHN82017109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5dcca2362b43f82d3f68d6ea0125a17e035652e6685e92d3f4cc8c962ddb6e. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZHN82017111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98912fac0d53409a65c4a9b7fe7012168a245b6c551dcb8caee58fa276f0dd60. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN52018240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c0f55167e92e630f947e22b76bd3070fa024742a1206dc20150ceb45fdbd3e. 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/QZHN42036636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15fbd3af2a3ba0dbd8df91dcbdb3cf1d34d2053bf3a2413d8e8bfbf1663ce6d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZES92042847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818894be48de03dae02e27ffffe20d5ce11d25234deea1fe506fd1e78fdf013d. 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/QZDA82044247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ceafc27fb52fb1aa35dbcad748c95de2596d60e9c4ee8206473fa3bfe4a3600. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZDA82029033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148f0c8d8e87ec3fc23faa275022ec2e2ebdc7be1011e5516f4982208f50ff66. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZDA82029032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a9ebc56082d6583c68646ca284f4c2d94fe55b0a8d4d482d7a53641a1348e3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZDA82029031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2d52218a246943c5ff1f881ac7eb55950171e4af5b7fec3aa894fb0c2178ef. 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/QZDA82027842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bc0dd62b4f18f2b7cfdb3469d58b09bd45c7135e6dbbde8f8d834f81fc00ac. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZDA72033912.