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 0x9e43feafc3bda3142135c514b28d3d0bb5f4951f98412fc60928f07af3f2d3cf. 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/9fc4cc74-af10-4c89-b698-05878d70f1a7.json and https://artists.proofprofile.net/proofs/artist/9fc4cc74-af10-4c89-b698-05878d70f1a7.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 0x150b2d8ec101b787a58d796497f2495436a5656f4712a37f03362030346417f1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DELJ81330288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8392e66ab6215093f6b0e6f3ff09ee7e087a0829bdca097221b13a7b35e645f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:09:25Z), 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/DELJ81330291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545c82d05295e6fa8a3e1c3c7ae070462316fd6416f2734d1c80cae918d7670f. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:44:53Z), 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/DELJ81330292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fb66171e3b4a35ceb5f2b7ec0315064ef72f156cd3fbba2aaf299801dccf3c. 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/DELJ81330294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c352806c2010dd85cb1d9ba258d46065d5630b2def5331dbeb6c5ea7c9a8138. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DELJ81330295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd292e2d2165ea45964124c0054cb846575b0129f6203b3e6acecc95bfe7891eb. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:08:33Z), 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/DELJ81330297.