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 0x2debef3d8ebe1d4477d92404aa6918fc793e22a0e587ac2d196f4d3c794ee4e0. 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/cda206f7-724a-41b3-89e6-a693208123bd.json and https://artists.proofprofile.net/proofs/artist/cda206f7-724a-41b3-89e6-a693208123bd.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 0xe26d24ebbae6776fc64ec8b65e4d21887f966cee13ad0b0f9953416b0eb53d63. 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/QZZ972370472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4055a878f2f71d9b1d0d63b9ed0cbc395fbd8f93a349efa5d7bb021882e570b6. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/TCAEA1839364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddfa249c3b14d6c0583d37421bfc1a7c7b46cb6c2aa665abccee4c09a238acb. 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/TCAEA1839365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121bbbf235918289eb1d430c638e767b4b66669c3547786cdb27dfc1ab3ea8c9. 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/TCAEA1839377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57ed238308c1e68a79b2bf6bb0866cb98ba2f43c4d9a401e4f9c421f1a0f057. 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/TCAEA1839400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0fbcc9fdd8361b2a5c09210d4e889dcbb1abf3e58c66dcbb8cbb32bb946922. 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/TCAEA1839402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38439c03bb7ed0f3129d59d0b162185337e964086efe4e794296da0a23920b09. 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/TCAEA1839447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e84ae2a2b7f2dfa41b6b8b8213f3c402dff03ee0ffcc19b29391691088493d4. 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/TCAEA1839452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd12f28eff8fbac1eed9bc601c9fad842a356d6bc1dd8ccd7de7bdd807037e4c. 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/TCAEA1839571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bb1cd5f0d92b98ebee74aac60886ed4df5e16a832d56c5bac619bb2ca8f1cf. 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/TCAEA1839658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112a5693c91520d55d58428875a0b908b71c99f182fb126308ee71feee6cd261. 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/TCAEA1839660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b2fde4797aeb1663c388e318da5aeff862514bb87e9e2b9693490faba93ef4. 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/TCAEA1842053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd206acd10305951444631f1536ddcbcdcd9e58810a789d6f5e526ddb94c99e21. 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/TCAEA1842059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cb3c4a90bb7da99aecc3728ec83a38a8448a036fcbaaf220eb230f28f5e48e. 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/TCAEA1842062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee936a595e32ad2da1b7b18d4939281621f186af046c5a36e243b81e7541adde. 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/TCACM1664839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272833a75faa4d6bc4ba441259e325b9c58f010ea7883e09c7c38ac0c83219cc. 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/TCACM1664730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e0d02339a620aabcd911a16658aa2fc9d49636e03f26cb377b00fcdc530424. 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/TCACM1664742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e1ab8d1d1bfb336fd080ee2d96007a1b315449c6488b05c41235291f3ca5c2. 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/TCACM1664749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5f130ab049172e8ce464c039b7f82d78d035aabe99b0c02829f902217f7898. 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/TCACM1664767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2573b5e18e26a397eb0276c2be775710b4c86a34d3e85fd21c8b4249cea41e11. 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/TCACM1664770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95c7899abf0ea4ed3db80cfc9079cc6477de5ad6059804d68f71d93612bd176. 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/TCACM1664773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82c27564b524f96e1fda49eb13479dcaf831ca98672afdbadad69894195cd6e. 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/TCACM1664776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c011aa23a0fd2de621d7aa57b25a7ceb01b2fdc9b5f8a8d92cfda138b317fac. 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/TCACM1664781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ce38a7079e498a297bff365cb0f0563b517f29a250ab20adab57ed4748957e. 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/TCACM1664783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf102923b15cc9ed3467d72462aefd2942e1341a8ace989734528f7d23f46555f. 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/TCACM1664784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348b6fe1486deb4fd1cdf6b9ca85b5efaac6746438f0ad5407711323d60e4620. 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/TCACM1664787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e1ea391f019ba397cafe365e56b6a49d2d3dd4012f358bf1609f5d4331a0d3. 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/QZW9K2359682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2537fb349e0b8361c79833e5715672dce57a6dd730cd5ecc861b2d82b08681e4. 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/QZNJW2130298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a5cadf8073f228940502e0648dca27025683c19912170e5200d473256e908b. 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/TCAFI2156800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b327dadd656e4f31cd035a0ed9373f43f61a32b1d2ceb14f95f9bb7ee1b393. 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/TCAEF1911997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af2e6e3a03ca5e6de61994adde0e55fb3685b86862f81c9077a0a6134c0ff63. 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/TCAEA1968161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554d6f3fbb4d3035e24820a286bb78e8f3a5fa9e5a1db8111c5baa86580d47a2. 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/TCACY1786071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb220a7ce97005171afbfd800e55a34ccf2fd75e75146235856a08b952ac9fff9. 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/TCACC1426374.