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 0xeb546c33e557d82ab7658924d79a860e14fd268a84e235364c82865d044cd7e4. 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/ab60aee6-da8c-49cf-9cdf-5f4c3dbb1814.json and https://artists.proofprofile.net/proofs/artist/ab60aee6-da8c-49cf-9cdf-5f4c3dbb1814.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef752d3a1733ebbbd0f79daecb4d8f5da0bbe016862155fe92e0cde7e62fbac. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UKXN21981143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa59c6832b01f60c55caf943550f1963082e1503bd2aa3adaf1a5fdca3fa1ff3. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:42:11Z), 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/GBLFP1562135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27095cda173f47bd11bc9d2cd2541a350f3efa125c52de08fed595160d75873e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBLFP1562136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd106b9f30502909e2198422882004257c42ae50709b8b217c55a472b8849b1a5. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:18:03Z), 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/GBLFP1562138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2cb56e17fd617159c8132a3646f871a43a0627fb628c2fe8d1371bba3af712. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/UKXN21981139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12bf049fdc2b381533cc63f8430a179e1089f9372bf24efe5384f93a8770e32. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/UKXN21981144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6255ef86ff8e4424f8496a2cb9ee6fc803009d874d77424c657066e1f200150. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBLFP1744498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdf313ecdd39b74fd05ab832f420ed72f35b67dda7d4fb9643cb51345b0df09. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/GBLFP1521623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf3a0df132bc232c6e1e5ac951eceb8c4aa9642417877c9b5cbf69876d6393c. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:16:27Z), 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/GX3Q92464761.