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 0x0b49fc3821a0cf4b0050a590e3f7bdbaa3f5ea84574d7a24620ae1c2b4092c88. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c35ffb4-bf9a-4487-95f4-49adcc87ff04.json and https://artists.proofprofile.net/proofs/artist/2c35ffb4-bf9a-4487-95f4-49adcc87ff04.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 0x957b59aef90ea5451ab33a7db8eee2d96f19b689f5d38208ed3415caa449e461. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:27:11Z), 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/US39V1202714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f134f129c67e6b87b07616398e4d7887a7bd687c8a2daa047e888a476943089. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:03:10Z), 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/TCABZ1453120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21f16612b8141220471e080a3860ccc42fb7322bab7cd968ae707896792d1c9. 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/TCACT1633377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd6372d2eb3af059c8ff505809b54559ab1a63b72f64cc7a9f576dc6d2afa14. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:29:52Z), 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/TCACU1652708.