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 0x6957ae646af8cccd7bcd3906acb522a04598286317a6dcb906999b6db921f3d4. 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/f7b4c6fd-daf0-4548-ac33-16515ab24b10.json and https://artists.proofprofile.net/proofs/artist/f7b4c6fd-daf0-4548-ac33-16515ab24b10.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 0x398e3dd6ce75df4afebb1e2a4358fe9f8cb40f98c1edb01c329882fcfb4ffd0e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SGB502232195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bfe0bbea014eff9cc9ed1558e422aaeee5e8aeccd1648517e3e866392765009. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/SGB502242723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e3de27952d231c20602c8b493aac68d945a99fc6053bbdfd479ce32e8a9734. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/SGB502334753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eeff787f914a53781b434437cf9dd929d508d27ac5b640776c0138a559cecab. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/SGB502232196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a2a21399eb0a478d59aa56cccb77f7bd47de1b7f6cd6048a021e0056b0abc0. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:31:45Z), 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/GXBAV2315110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e74d9b06b0648641014aeef4a9bc474b6f950299adfb766c5734846d2a13a4b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SGB502237704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060d8fcb5bb9b6093c6ad874ab6d258582d2badec963e5c9ed3109b8b04f17b8. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/AEA3A2447805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fab72bd174921b958f5fab2d4806bf98dc9fc8a0552f080fdd2ac15147e729. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/SGB502241689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a4f81349ee5eab74daf49f8a800ed446ee5c815f8de617039dea76372a0472. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:52:55Z), 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/GXBAV2277802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b98688302c082a9f93dccbcbc9dadc330c62933d3292a5e400963370c6a3df9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AEA3A2380761.