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 0xf8fb9277ec7f7a140da4473aa6edc988d426e3090f0da48967c81590c7e62191. Chain 2 (Bitcoin): anchored in block 953627 (2026-06-14T11:43:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2fec7bcb-099b-44b8-b227-39ed84e1876b.json and https://artists.proofprofile.net/proofs/artist/2fec7bcb-099b-44b8-b227-39ed84e1876b.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 0x74ef717a34525ad4dcb443c8c2c9069877b0d9f3a1693d5fe9cd901b2947639f. 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/SEYOK2039773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7157a40cf82626d00eef06bbecb04a341fa1cf5aca48f788bdee4ccac7ae2e98. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:59:29Z), 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/SEYOK2042224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7923c2c95c5e381f7d4a512c1aab68100ac68858e980d71ce2c292d86c7a62a. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/SE6DJ2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e2ec102562f13bf16d36985f25d9023f1c3eab7ba6c8c1f75ea23d34fcf74a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:22:54Z), 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/SE6DJ2400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8343e6da60a81efe2cef07516e3c765e059c4af025b3573f66bf6e811e7ed54. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:50:51Z), 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/SE6DJ2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127720d1463212e4714b4e03d436d8ca7daa53b6789cffffeb550c98b2bc81c4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE6DJ2400105.