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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fabd9370fbc9cf983df2a315c64cd32041470a057a8519c18d8650e5b755b9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53fe797a-0518-42e1-a958-cb17a84307db.json and https://artists.proofprofile.net/proofs/artist/53fe797a-0518-42e1-a958-cb17a84307db.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb3d41777d957733d44b5bfc846e535e0c13b22bbfb0a248b77eed571e1688a. 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/PL89B2000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0d6e0bb827d3ee845c97636b7f892b847920b830d5cc38579f0a8c46cc1ce4. 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/PL89B2000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae96e0ae083463ebfbe6d92b01b913919cc623971a436fa302a106ab702e3e8. 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/PL89B2000204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6c033a2c9b66a0e9445db1dc3779832b2ecff7902cfde38d1803750d761001. 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/PL89B2000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10dacb87e6a42c0a4e743330b5eb75a210acb1b126d399b1bb02b9bcec5c4c7b. 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/PL89B2000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2216d368287c60d60f79c51108f34b292def9899784d984733c0225a3020c2d0. 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/PL89B2000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1412218bd5347e00a1ab4928a6a0b6f697f513523319cfa9e386f05a264a622. 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/PL89B2000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91dbd45216d5d5f358d508174bbc45e559db4d78b56fdee90b24172073438b1. 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/PL89B2000209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563280be945cdc4729746ea6a0e59610788fe50d4b593f1dfbb49695ff7e9d74. 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/PL89B2000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768ada8f3321265546642ac0f7b17e46d3ec4d5581ddcfc423ce6c42f22d674f. 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/PL89B2000211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99809a3f0e866f711ff85d68c378d59941aa55fb9bf6b8792bcef927a8cc9b09. 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/PL89B2000212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca34a4af847efa5643e57341820b8f73bae4898a2fd045ca243b5580b97d6edb. 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/PLC062386742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2ef2cdb5f6398f04e7258ca869a29df8cdc161c1c52e1c36a490bc52b7eeca. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PLC062388451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c80f4fef8bab9e379e2e4a0f99888f7fcc707f45c813851d49386d17ccfd85. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLC062246889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563280be945cdc4729746ea6a0e59610788fe50d4b593f1dfbb49695ff7e9d74. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PL89B2000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9fc461d050ee5f0e4200274c804c007f0accc3bfcf8d0cdf5fc34761f2678c1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PL89B2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2c36f079ee6bc3e063c74ec18168428136c011dd16ec5dfae803960755eed1. 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/PL89B1900232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf73b05ac7c357a18f2b2538d7de7732b660c5d4ef799588a07336f4f0595269. 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/PLUM71400202.