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 0x26c5d6e93d18609d3b96576b8b7a7b30597db88b84c406bd019b7f17d0d8a140. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bb0e7ef-2b04-4e43-ab31-f8cdf19e1869.json and https://artists.proofprofile.net/proofs/artist/9bb0e7ef-2b04-4e43-ab31-f8cdf19e1869.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 0x69b7dedff32272394e7855c956390ff68c8237001693eb31966b68d83ccd65f2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/US7VG2432569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f56495b61cce973af27769e7aa44d93d5b44959425752516950b39737e1ae67. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:33:20Z), 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/US7VG2407925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dccea358e9c679f36f1107f882fe708bd18fe6fd2a4b9687c912013d09f7c10. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:05:14Z), 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/US7VG2407923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797fdb297f93c9331a2d6c31b3fe069969bc4a5e63d2db67ee69044322c23de3. 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/US7VG2407922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4975c979fb942f31ed46ac25a4fa25eb700ae9054f7923e89732f7a0c21d381. 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/US7VG2407927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559176d4656655c29fc4b0af72568b04a526d48fd8aa67b458a854b01efbcf09. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:00:53Z), 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/US7VG2432568.