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 0x40262714c023fb4a66de89287724d233696529c4dadc52c1f262c1b29548f388. 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/027e1aff-e175-41cd-bf0e-406a5e940928.json and https://artists.proofprofile.net/proofs/artist/027e1aff-e175-41cd-bf0e-406a5e940928.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 0xf3e551324e5216d1d67d7d20f11f587e14b24eb894161286d2f823692b3aff78. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QM7281909652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1912e0cb810aa53b72f4e2cf56b4f7dfd99b0d23763f8cb4c6ae00aa70a38261. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QM7281909632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f454bd5280b7862e28b79a28b50ce9671e938380aae047d027cd5390fc2591. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QM7281909633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941b1efc33612337fa2e0a05c8c68d74dc37c6d443884bc5d3d852dfe67f2fda. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM7281909635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40db2439f28466a6eda6a7d3c59a735167a50dae6754ae8d9e7896b55a8f976e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM7281909636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c567578251b0afa7004a7a0471f1b09f10a5465c08c3163a9d855841c27123. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM7281909637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91fb4f083fd591553c7a609a1b193f1d3c8d96de130c70fc1584aa9f6b1b5ec. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QM7281909638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eece9a8a2581ae053ee0ac3477ac044eee4dc684e59c94bddf9a428f42bb90a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CAUM82100207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf353106e356294d30568eb69afaa92c6a7441cdcf8abef6f4730b6c14bce64a3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CAUM82100208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372470079472bef3e5e480851420a106bd7b21f700fed726d5999c043809a767. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAUM82100210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa178e8ff7644d3aa603aa5da358057a19459ca029e1f377a2a40014c3ca37c57. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CAUM82100212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd72f23b3600150c62312435215bc422a27e9f8a244756f932a68bea87be21a. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/CAUM82100215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eece9a8a2581ae053ee0ac3477ac044eee4dc684e59c94bddf9a428f42bb90a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAUM82100207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf353106e356294d30568eb69afaa92c6a7441cdcf8abef6f4730b6c14bce64a3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAUM82100208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a22bec0955476333c1fa6e031102535038ee58e3943e419ed1805e606a920f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CAUM82100209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372470079472bef3e5e480851420a106bd7b21f700fed726d5999c043809a767. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CAUM82100210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30db3d99ee30c7fd0cd192ca636eb5df0e5b2e66ef35884aad7210210e265e93. 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/GBJET2400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3d56162aba7ed51fe7e2f95938b5719dde0834604183b04a1331d8b41dd5dd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBJET2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3d56162aba7ed51fe7e2f95938b5719dde0834604183b04a1331d8b41dd5dd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBJET2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffb7f72ecc9e67115e50d230109e62c2b21b779116f5814340158427284d05c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GBJET2400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30db3d99ee30c7fd0cd192ca636eb5df0e5b2e66ef35884aad7210210e265e93. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBJET2400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b7d1d485572be903147420d22be1b1510ffccf7492a46b04f2b0ff253b43da. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/GBJET2400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38065bd549f64948ffa7ac4f08da5005a4db03969327604fc2374d2ecbe62f83. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GBJET2400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3d56162aba7ed51fe7e2f95938b5719dde0834604183b04a1331d8b41dd5dd. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBJET2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffb7f72ecc9e67115e50d230109e62c2b21b779116f5814340158427284d05c. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GBJET2400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30db3d99ee30c7fd0cd192ca636eb5df0e5b2e66ef35884aad7210210e265e93. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBJET2400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b7d1d485572be903147420d22be1b1510ffccf7492a46b04f2b0ff253b43da. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBJET2400053.