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 0xfffe83104ce69690f636d1c44fcf82c5168442797983cbccb2ac091e9c3ad225. 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/461372b3-068b-40f4-8cff-399967fdcd29.json and https://artists.proofprofile.net/proofs/artist/461372b3-068b-40f4-8cff-399967fdcd29.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 0xf588c66a717069033dd38764276deb39385f29f6722f6af97a68a7d57f6c53a2. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZMZ92429630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc5b71054e040262c1dd378eaa2882acd3470181f9724960fa16be0823501c5b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZW9L2408927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93215bc8fb9ee54b2f5f5de82b1b603ed1c94653e3134c7e5e83f1db1190b612. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:42:58Z), 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/QZGLM2551841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e3c2b1ee3136c4dd9fdd9e704575acbd3717e000888eeb089e76a6a673a122. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZGLM2551843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d513bcabbfa339b1cb84c6c209c30a4cd7a29d6d79e7f0623f5bef413f9b2da. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZGLM2551844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67b14d4e75d087a96c975e0ebb07001f5bda3b3b88208ddcf82c6f8f8e0b358. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZGLM2551845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac4fae669a85972cc2e453405eb170edb7044782600e12f40c4cbb6d15a178a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZGLM2551846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81df8918c3c29ec4d1766135f57c316a9b5509c23f2f448912b723a8dd9cff21. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZGLM2551847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef6570ca981a612894bdc8a67448ed08ea3ff53cb5309eafc251208cee94c2e. 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/QZGLM2551848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b680f8cc9419b9ccf71ae1675b535945d699118681a96ec8c1dd05702af1527. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZGLM2551849.