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 0xb05ce39d8f3e0309f34a26d9980078e255bcb022ecc68f49a6c970d3d0d0b97c. 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/cf8251a3-c61d-480f-a03c-fc3c74d78ec8.json and https://artists.proofprofile.net/proofs/artist/cf8251a3-c61d-480f-a03c-fc3c74d78ec8.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 0x15c92cf17e8e57ce5664bfaba6e876a41f8538aae74289333806a958a3974856. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/FRX762436684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c98662f71441ecc68c1c376f339db66d19f41a36eba8806a698d9638ff5387. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/FRX762436686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276dce2517b2af0e303221c26f7189aea8ecbb84174fa90ae15902e2673b1c74. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FRX762436687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c982c6290851b4c082a7820b8763682868f036fbcf28ac06db691d247c2a9f2. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:15:49Z), 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/FRX762436689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6a721f7f0363df06618298c8d8124e68c3eb6db801e13235a7ae06d2331a85. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/FRX762436692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcdb7efa2b070a18f4ea8bb267c0725a504173b9df3d2cfa53c7f552a7f4440. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:53:47Z), 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/FRX762436694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9de99cecd49da3f960d552a8978008fdadcaf0edbbb72340893494f3252a2a. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTAU2527287.