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 0xc97a2939578feceff37ffb2984f15da524df903a462443b1c53435b9eaff4eea. 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/2af179f1-5d40-48c8-9e2b-09fc24e05b56.json and https://artists.proofprofile.net/proofs/artist/2af179f1-5d40-48c8-9e2b-09fc24e05b56.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 0x9c4a943258345e63a89bc9cb97f9ebae2f430eda10a19f58941105892a2fa4a4. 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/BKAVO2200718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248b835bb0b914286d3d6e2b91a4a7ecadd8088de1145bd7241939b5b8435884. 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/QZWDW2420206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60662126161c4db9cd42a221be7521d90133876694d273893a4588aa39a281c6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRRGE2400749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd861cbd75705b29101db3aef02953750f252171f96bb8b4713418ef6847fb92a. 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/QZWDW2447014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176505d4687edfe5619b17112c1117c0ba0873bc0c254d007e983f81c2e87481. 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/BKAVO2330777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c025f24520399615e96728bcabf2f581305a2d130445d6f1cd59e4820d9ced0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BKAVO2230373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1892e51061701943f6f21b49211e7a3b2863cdcf93b73bb1c2b2871a3833e5ea. 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/BKAVO2202220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8161da7240044f900598fcc9f98368100bc774a259d3ec9f55622a65303f760. 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/QZTVM2465357.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603b5fccb4914b6098f25a17e55587155f639181a6605a0d7896f032c1f61b8c. 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/QZYFZ2431450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0b60b3d60af4ed1d131fb191013c6665fb8da62e5b5bcf3ac45ea258e57b5f. 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/BKAVO2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fafdfd531457ffdf3d59ee5255565999f4898d31ded1e495402e77f5740c7d. 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/GBKQU2259651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eae4989d23dc86d54d8b3da261a20c2712146078101db801ff15b52341c6a75. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/BKAVO2000340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbbf8c10358a6a315a6b7cd8b08254f03943da7fa305f8782f92b6592c2fb135. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/BKAVO2000346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac169369249d66beb0efc82cabd39114d99f193065b541ac75e00e690272ddc. 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/BKAVO2000354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07f7a375b83c52ee3d9436336a4f5ca80acc176e079984b15fc54455f00c715. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BKAVO2000363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108ab44b4d236be732ce6daee202cd93da3ad16b56b3eb2670e76a0d65ed9433. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/USANG2502670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aec177c880d542920834d5327f87784e03f8460c31a7a86d486ee46b6eeda9b. 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/QZNJZ2575064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860da625ef537a0e6225733b371cd8fbd144c01820331d11826b965b91c1e7e3. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTVM2523347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317493643766b5ccc39cea3062b5b34e3c109a139e694aa2ada4068c816fe9b7. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZTVM2570628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6446838c72592894ce53d61a9b20ee13d3df7a5de52d3332ff91fb55439872ab. 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/BKAVO2000347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299dfeb1b8f0a4e74c207e651a758028d7e9ab21e39545422156c5f6f1ba1aa3. 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/BKAVO2000348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920b958c539ec4162339a9d738f071c02219c272a3f9464509008b70941d3ee1. 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/BXNT62500072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23be864481d69d2f1ceca9f60390530f886b981b33b1450fa79fa711cca3d20a. 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/QZYFZ2461231.