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 0x36e0f7855343474a2e3f5efdee635c2b0f8fde00974c894194c270b4885c615a. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b58c0c96-986f-4cf1-9fdb-41d91b0f06d5.json and https://artists.proofprofile.net/proofs/artist/b58c0c96-986f-4cf1-9fdb-41d91b0f06d5.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 0x7b55df4d35a5902dea3b6179e4e0177d14d57b6b9772dae40d80196550319971. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:29:38Z), 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/NL1AP2038774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd44f683a5584f27cb5c9a3a1be91d5019aba3ec4a4e4c29e967ec779ab71dfc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:33:43Z), 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/NL1AP2038778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e6ee70e7b41df2cfdf5307bcc4b3733878b584e731f75f5156a0728054e53c. 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/NL1AP2038779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e75ca48d7d30414bb7e01719ad66afba6c3f27dc2d75453037c48082ae1a08. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:07:56Z), 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/DEZC62588239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14c018087dc248fd359488a1bbc7dc3fc49879dd217aeb8b1448e6eba8559c0. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEZC62588240.