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 0xdb6effef50853335768bbbf3408c02bd63199d28f9608b86b32e8a86c7dcdd99. 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/e527fae1-0c8d-4150-9674-9cbf80fbbeda.json and https://artists.proofprofile.net/proofs/artist/e527fae1-0c8d-4150-9674-9cbf80fbbeda.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xe79538e17fa991c582e58cb733d3846d40b1a2edfe364ab63889c75d56c6e9a1. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:23:46Z), 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/USA371648872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc083af10caea0b4fe29df3efc5cd4c3c9d7038683508054d8b0efa681afcfbf2. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USA371648891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a12457b7ebba2d8b1019e44e560b9333b4cac63300419e3ffb0d17c609ac270. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/USA371648874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ca1c73f7d404864a5d3e3e44f616fea5fbcc3c7c74f4259ad8093211b17246. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:40:45Z), 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/USA371648875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27672642e26b886cfaea4536a1c672070fc06520b4b828468249cd3e069a9d1a. 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/QMDA71418580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7f4606174f64c72716967af603033ce2a26c9983b5de55c2e7c39ddbb52d3d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:00:52Z), 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/USA371648884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980851ed766d8e7148378f35fa40b82ff68eb1e969b26db68e79462837fc1d16. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USA371648902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5ba33d470a37eb7f5805d570d810e1512106e974d43e8181e64a259785e811. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:24:57Z), 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/USA371648890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4780b0482facb83a36313252451ec846dd3624d3af45c444ba922b644f7590b4. 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/USA371648877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0275aba20f6e815862d3ce71dfb19f0e8a46fd6df754d23ff5c6982eca0b81db. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USA370902955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd7fc58e9be5475657e466099a4f0aa860138b5d04e20dc29eeb9303273ea39. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:03:48Z), 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/USA371648880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92123ba170d1b9b20fcdff1bcc7809896c15ef948080f34dcb71c7349627fb28. 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/GBLFP2422958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894d4c4173440936a4bb8d66ba71398334d87362fbc37fa92e5b96e774840116. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/GXF9Q2550012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08142295dbf80f3be6a3bb414eeb9cc628ddc175035c46f08b9855e80c49949. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/UKXN22520266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6276823e1ff988c6ddbc5b754247679bccffae97e85f837b7196d29fc7d78e30. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKXN22590309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117efa43f4fd580fbf148dbb45a85e883ca2fc62fe94c354271970d2e800b8b5. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/UKXN22590311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb423514f101fce615d808feea5bc4d3c646218db9525641e223080f61a11109f. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/GBLFP2521001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e5ac21f9504794a5701203381dfd0af5c6712a491ae64f3c29cf92581449b4. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/GBLFP2521002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ecbcbc6c42a1cacf3b8841312cf0191fcc5df70cbdb4cb3535b1444853798d. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/GBLFP2521003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e1807e3d1f77f8b892cfc77ade55ecb3ced9774cc8781521955bdfa09a5d88. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/GBMA22543029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43e498ed0de0c8ce7a79f887084fe06be77ee8880c6da99bb3149eec48b7b8a. 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/DGA092309413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7d23caffd8dbe5e581170584fa2f7a6f1042105998e8338e2c8c64f28cceb6. 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/DGA092309415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15af42945cb038482eba3aaf01a9f369bcc339b2bc1708b0180e5dc63bfeca22. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DGA092309416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f28a1b02ea99c65297418e816911f1ddf330778164a4787eb4b4eefaf3ab2c. 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/DGA092309417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba1487bf7b2ed7365c79653c672748af7f88386412ed8a58f964dc3d2b0e77a. 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/DGA092309419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea8306cdc20e996b1f81e7645ec01aff41ce2d56ac82ede0b720deb0eb176ff. 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/DGA092309421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e752aa66c36962402519f4b1ae75e2d211d30cad77fd6ee69d38ab7723119dd. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DGA092309412.
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 0x454a44a6fdde3f0e368d63c4c33c7f73b590378554be70eb52a0f1ded7801ed7. 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/DGA092309414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd2ac168f23a866a69c2c9d2f0f5e3eff729de1627f2cb8a0402d42dacc1bfb. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DGA092309418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cda297144e86f4077a28bef98843ffd93925b7bc0b46eabef3e3fdc63f8473. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/DGA092309420.