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 0xe005876cc77296de5923911d646587d40d5924452169ad9f29d6670f925b717c. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b39cf4ce-c2b8-4122-bda0-9b861ac5a0e9.json and https://artists.proofprofile.net/proofs/artist/b39cf4ce-c2b8-4122-bda0-9b861ac5a0e9.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 0x822e2954fd65c82e5df311b92a93d0b0d4db21ae67d7692c95cee6c29abd77b6. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:29:53Z), 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/QZFYY2323758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2156a98409dcfa78a58afe516044cefd1c00d1b0f4dfc5c7c790fc2900eb221. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:40:25Z), 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/QZLBC2309883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d0aafb1f20a5f1750e63a90d48a72125084b41a3a5332fc42708029fe71d1b. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:41:03Z), 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/QZ5FN2433015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20a2da22bef3e47f3c4144384b86d386fd510c77cad8224be8195ed50ac9652. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FXR592403120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fc88e08f2fffcc1ae510d7d7855070693a93ac96e82ec69181c6effedd9150. 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/FXR592403127.