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 0x96515b85dae07c81a1cc73d7804d393605329169bffebe887db61b66b66a28c3. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a39a841f-ae26-40b3-9cff-332de9ede088.json and https://artists.proofprofile.net/proofs/artist/a39a841f-ae26-40b3-9cff-332de9ede088.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 0x3413c425a3e71691cc970ad80b122ba9250af693ecbbc1c15d567231bce4cde9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:41:02Z), 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/USR7P0204401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75227f565b9994e995c7442e0a778a3f7fd0a9cc300c75df35d411672ea4a31d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T01:03:52Z), 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/USR7P0204403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cf98cd67691e7b1bd28ca7b037d6e9f8a58ffd0cf8a53748ab1edd41530950. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USR7P0204404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd67a57b8b47d237aaa54dce686cf27fb92749e96c9b81ca7f57efbf5df171d. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:36:39Z), 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/USR7P0204406.