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 0xcf7083ba230be90e7d728b21108993773a82109deaf9965e3c29dc6bc4677c62. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf7ef7f0-8049-4848-9b21-97b2bc180dc8.json and https://artists.proofprofile.net/proofs/artist/cf7ef7f0-8049-4848-9b21-97b2bc180dc8.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 0xa23e038e461d0e11574ddb7ac7991e086af1893a404ea27f41696bfca34b61ff. 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/USLD91752755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f520e317b951de1dd228feeec4486a5273e559a03da00da8e38600dab993e5. 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/QZHN32302861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d640e20ced7d0e654c671c3929e2c4b3e9b1a8baf9d830abe0b76b68dca2cd. 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/CA5KR2215244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7052c32fa5b95358a1b0f15347a69eebea65a3bf19c0cd6e902dcec5aa53c73. 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/CA5KR2215245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed3c597754704a4680fdba3d58a6200248e92f30c2ece77c5a8d93ecc006ad1. 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/CA5KR2215246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc536b37471e4ba6a38f730c69d77bcbc8c2b94fc5ff393a713effe502cf792. 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/CA5KR2215247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bda34b8131a284458317d04aaf9b8e2aab2f6cbb53a8674eb28e6a355dd907. 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/CA5KR2215248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76b8a0ce5448bd962f3b16b860e70e7a6f31389d9d3850cd112358277a404fc. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/CA5KR2215249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be4aa0039703fac87e3f7590ddb337bf101f44db89700fbb6557f463f44b0c8. 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/QZTAT2153932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d2fe24c5cee01908fbe4036a57694da69120e712feb9275683812f7d0ffe9b. 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/CA5KR2215250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d41edaad5711e0152ceadb6ccdaac98f3ca03521516782118f4808662046111. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:21:37Z), 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/CA5KR2215252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242f19808e08be21c3160a321da6c9dd9a0af3521476fedbf48a7f0fdd4d3aa1. 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/TCAGH2223308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f04270a4523682f365aa781561d98e5305a4d5354a098d8142ef3a514fafbe6. 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/TCAGH2223408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25ba48742d44ae00add4aad64a7b10cf604c11b272fcdf045e6cc0359e5f937. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TCAGH2223344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a65ab7229165d1f3c88e530662c0e0508c18c0cb0c19e5d1a84174599a882f. 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/TCAGH2223348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5003505c68609dab4fd8de581a06057cf92be1d5b0751cce2093765fdacb69. 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/TCAGH2223351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14d76fad148d267e925eb99c3a8cfc3dcda0f28e607659346113cef03f33a42. 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/TCAGH2223353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d63f6ca81c5ed104a642562c9d49371882251f0a1ad649e983e5839fa0d5d5. 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/TCAGH2223368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9214aab2ffe20ff819b22b32d4b8b6389b5d94b5663c9938bfbdbeffd85c29. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:08:50Z), 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/QZHN72250664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9118ec96d75d371bb81fb69bf3dc8931ff893b66f9e05edbbe0bd6e03aac5fee. 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/QZHN72250667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe89bbfa1561ca03f12b653d07030d092ac5503a953ef3cc42f33a4011c25233. 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/QZHN72250670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1338379f5ab3e724f472a74ef7c09d5568c77567836b696dee45ade0b59b6706. 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/QZHN72250671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c86eba5f257ed599fc699bbca3221554d0d9b95ad9fbca7711d135dac9513e. 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/QZHN72250676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3059b545f62c380bb564683289d3ae99f7a4f4d42f12da012230ecde49fce544. 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/QZRP42354753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdece47d59df4348c25de0bf43f0bf1392e710071c927f0ee0e421387c092b761. 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/QZRP42354755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d6a78fcf943ef9d20d6c9167187a3ba2f51feddf60e89096903e27cce29038. 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/QZRP52357873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330975650bf260c422aff45f77af588f677b34872c346f1dc6c7afe3f06084a2. 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/QZNN32159537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12aa6dd0b5e04a2a9727d3558eea209c4176a5161bc1229e3d11cb98dfaa2750. 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/QZF8N2152218.