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 0x6c7572a27c03be2ebb5f855251cb2944473938ee19e026c5bf0278ba5c1cb2f3. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ab9bfd1-9652-484a-ba6c-39c07c756dcd.json and https://artists.proofprofile.net/proofs/artist/9ab9bfd1-9652-484a-ba6c-39c07c756dcd.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 0xf9017f96fb3764643a7e8149641dd8853f047398c7d053a061a4f7a626be5f33. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USHM22393324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3444bdbb7b014857f851195cacd597d6099f73bb2d70b79d71ea25886996507. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZ5AB2148034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9304ede5a1429c983dda607136b4b7b535a6c6a9c41f8dcb489e0d7c297b42f. 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/QZ5AB2148037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ad3026ade6df254234e9d03b32331499e36e4f56d79009f83d3f6f14b31e1b. 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/QZNJW2419135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eebbcdc70aa666dc724c225cee6ec50b40550d74f461ce29ed0755e60985df3. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZNJY2347637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa748bb53266e4fcf07d65253551b915b66cdf21e76d448154337a3f0a3faa86. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZNJW2419427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24b29dae3ab702bad9fcf7c6cfc3f8b38ad5e9ce34d14dd5ff0e69474d50f91. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QZNJW2419428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b6a6c65526e0484a8acf1794998ea316164d06962717d001d1b4c46297005f. 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/QZNJW2419429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e6c7e5d98ce4ba4d8994362b097bab33d2ae960016c8f46c8b348c633cce91. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZNJW2419430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc21caf3f22ca19ee365b8f54684819ddfd8dd0e69ef66e59ccd7203beef78b4. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZNJZ2330153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8289f41689afea783744fe03783ddcc59497b43a69f161f9840c41b925df486. 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/QZNJW2419431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ad3026ade6df254234e9d03b32331499e36e4f56d79009f83d3f6f14b31e1b. 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/QZNJW2419135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc21caf3f22ca19ee365b8f54684819ddfd8dd0e69ef66e59ccd7203beef78b4. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZNJZ2330153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eebbcdc70aa666dc724c225cee6ec50b40550d74f461ce29ed0755e60985df3. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZNJY2347637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0ace5b6c9b588d08bb9de3e62b61e7401a55ae683223715c3f41ad7b1d6656. 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/QZ5AB2011793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fd53cd0fea16629a3b1a62b50584875d89fc4020a99894dada182691a4b033. 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/QZ5AB2011794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f45f0c743256f843a240053c5fdfcafab473923380e5a7287a155b154dd1ed1. 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/QZTVM2450262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf44f1b8712531f0de6d30f697547d888c78ca97d6a3f5ef3cec78a90efc3e1. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GX5MY2201649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec99d14d4f33360dd6b11816bcee89d10381a72abd574ef30f18748a2f8a226c. 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/GBSMU4127259.
El Camino / Sin Hablar / Un Nuevo Lugar (Acústico)