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 0x2cc4055c0e2180d77c901e7222fc14e76fce9aad127b280ee12d352603be42a4. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae23c7c6-4a7b-49c1-90e3-ea3e8666d287.json and https://artists.proofprofile.net/proofs/artist/ae23c7c6-4a7b-49c1-90e3-ea3e8666d287.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 0x00d3eb7f4f67e50768420781a9a8cd43a6c3d9af7e6e56d10e78388898746867. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USCGH1596817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d8014e787737163d75d62411eb0df7965f408be2ba0a36daed999d749f5aee. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USCGH1596818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8251268dd9280a650cf95394f53c4444956c92a4314bb61317d3f00645990d8f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:19:22Z), 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/USCGH1596821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1bae1cf971284cc3d0b6eb2c3bad95783821dc2ed9f76d74afb15770495458. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/USCGH1596822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322dfa08b2e16761aff4a86d87b333cfa421691d0054e6e95c840ed78089b498. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:38:17Z), 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/USCGH1596823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe205363a457a599d2ade50a1b45fa288e879a83b14105fc0f9d68eca0f58bcd2. 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/USCGH1596824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d04234639dd4b6bd1ae8e0cfaa1053640f489fb81ce01e75efa31f1fbd19f4. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:08:18Z), 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/USCGH1596825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1021142ca837e4d5072e5fe209bb49af828200b6829bb9ba28ac1c68178fff. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:52:41Z), 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/USCGH1596826.