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 0x794d9cce8d90c8bd7275a10bea194077cdbb0dd1d3a585cd88a8354f902311d1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b27d6e92-4900-4d33-b853-9c5ca7a39787.json and https://artists.proofprofile.net/proofs/artist/b27d6e92-4900-4d33-b853-9c5ca7a39787.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 0x9acef7eebc6d289ac6cf0ca819ab3e04e9b9a963d239184fb7a24352b695f9fd. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:07:40Z), 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/ATEK02456238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef078eefe78cf0fff1624a313b0caf45e341462349fde0307d5678881dd626ba. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GBMA22362304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d740a5b3b5b379ff9ac2fed05d9e83bc7ff43d19a302347f71b23dc40cc415a. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/GX53U2406082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a69fc06acca07c151d8301d90d8153e6ba74965fbbf1340f296333fdfd2436. 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/GX53U2494612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7025ffbe5cb2d8869a68e9f510f15391e337f9a6874943859da43de3213dbbd. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/CBEFB2400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2325a94b5e7f35324b922ef5d1e204c644a76f7e289ee81feb07cb7243e8b2d. 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/GXHND2525206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ed18dafad75fee7ee2f423f108db2f748059ae826407190394d2fe23a97c73. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:47:48Z), 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/GX53U2607799.