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 0x8f2264c7c1f91e91a7db127e8e8dbe3e0b558a2d59c68e77c34b6d2c23695b48. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/448050f9-29e3-476c-9751-2c7412fa4a3a.json and https://artists.proofprofile.net/proofs/artist/448050f9-29e3-476c-9751-2c7412fa4a3a.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 0xc72d76667e5eb959f25390966d70725e56423fde9befe1e5aee9248e42174fa5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FILGC1300818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f25d9f1a67cd78fadf2227f728dd556cbcbb6c9a5d3af5d7f8d1da1f7d5886. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:07:42Z), 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/SEYOK1426607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c0d28e29dff9c4f88cd41be49c9a2d03da685a69ac06f4eac4d2947062a30b. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/SEYOK1426608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbcc960621c95e116853d46c3af3b4ddab8d288a4ca8942f80f59f9b45e6295. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QMBZ91691256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce56bd77cf7c041b00f25244f0e22b06ca18c544a8774f12d74ccedde851ad5. 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/GBMUE2100085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393f75f678d5d2a315f645565a687905eb5ecc98c6f87f7aac1a7bf6ad7ebfb5. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/GBMUE2100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce56bd77cf7c041b00f25244f0e22b06ca18c544a8774f12d74ccedde851ad5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBMUE2100085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393f75f678d5d2a315f645565a687905eb5ecc98c6f87f7aac1a7bf6ad7ebfb5. 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/GBMUE2100088.