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 0x26d98fec99cd894da5ffda0c7c34512ef90188b68536cb50a5a72abcff3b4493. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e34cea3-7b42-4d42-934b-10552a46d4e4.json and https://artists.proofprofile.net/proofs/artist/5e34cea3-7b42-4d42-934b-10552a46d4e4.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 0x9686a1b76760837e22fd0bfa26b979bbe3a65c3b693e66dd9fdabf6a7bf7b6c5. 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/QZJL41900095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bc9dbc0a5050412b05f3e54a4d2592074d6c0bc20616fdc51624fa8334dfcb. 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/GBKPL1948079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c56b55e94ac8da0e7218f42d5ec471b150dd9f761117eb18332e2bf8d718e4c. 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/QZJL41900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb431aeaea3c18ac0c60811e747118e2b98b6fbaaad253aa769f89e067dfd42. 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/QZJL41900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830d90956788ff4b24fc2066cbb0cd28216b7370f5053209d57ddbf1a75e7434. 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/QZJL41900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd06bea1a45a86ec2c1973bc033952433993a9a14e3b8e5cd73ba1d2373a75b. 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/QZJL41900036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a54aca490b76b2340657b29ae3b636cea363628a903230bdfc9677a1d16655. 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/QZJL41900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe667ba91ff61323badb91f0f8161a13eb3bf2c23a1a22e0a0c164227f6aef9. 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/QZJL41900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d99de77a47021ea7e05a34745168b3b73eb65cf30056f4aeb5f804a50588c64. 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/QZJL41900039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7630f9051bd8f553fa54eb8d21558065abe8416479777f453e4ca48eb10c856b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZJL41900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6d98d4cfb5bb2054e445e5d076121d5d3504a1e4d7b2f46daa9a0c018ef67c. 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/QZJL41900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf629175cd9308c120f3b36162cbf4493054f5d453eb4e9d318258415948d6454. 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/CA5KR2454500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f8244aaf8936a8d7f329208ca2230b4abf86bce2d8e750c6ee6fd59c40a30a. 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/CA5KR2454501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729cc7d4ca91a75ab520fc85463fc831b528113244fc707d14263f3c2fbc83b6. 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/CA5KR2454502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e347dd5a534dcea240a4e8c014278324479bc20e6d07d738d3a2b54baeaa0f. 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/CA5KR2454504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd4f87dfccb37a60122401d47a65c245ebc3d63be5bbb75e343b3124dd2b58a. 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/CA5KR2440322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0598744edb09ba43f9f2832f0602b1ccbc43700f6cea736ccb451fbf994334. 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/CA5KR2440323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c79e30995102f353252544258460d9f8525c1e4b24afa5c795054c35f32c14a. 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/CA5KR2385389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca33c3b590568abb2206434987339de8262ce19869c62ece42dd921e09f35c63. 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/CA5KR2385390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d14e08c85ef6cecca1bb4c8498a87e5df47a2c784baa42d92a70e4a1836ed93. 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/CA5KR2385391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663448b918a78db9fbf25cb2419c4f837342082d91176f5fefa28724e74db58b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2385393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811505ec230ea2519c481db17dc8dc25d5335b64efa3efaff1b818021898d4bb. 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/CA5KR2202299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d1f1fbabe3b681c215ae028ae44b5d7176b0548ea262ed724143f5824c709e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2202300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59695d79e54318946613eee9dda5790a7b839161b567d6777016b34df632268d. 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/CA5KR2202301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d864b77cf1282dd8eb4c69b29ad8dda58563e258b8dd86465c87fcd851e961a. 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/CA5KR2202302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1e7b86eb741e0231948ffea4f7b1f3cbc346d59532f121b3156197ce1ceb6a. 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/CA5KR2190816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80b03c9af9de1aad7b2e134107553030c38e3fa674d6232dd5b4c7829ef9544. 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/CA5KR2190817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cf39b6f3f5e0accfaaa28ef69b5b757222cc32a51e90b11028dbe88a707358. 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/CA5KR2190822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937e0e31b756e2756e03dfae99724afd02c2bd0d94121170b44385829fead2c4. 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/CA5KR2184490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cae097d39540ea656ae549c9f967feed4d8bf1a55ac4500e45b5b10795670f. 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/NLRD51952326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da6d6bbd092db63b8b332261c711a2f3a52295486b2d7a6be8fcfe7bec9c574. 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/NLRD51952327.