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 0x95a4cbe8492dd7232617e57789ef72770cac20b9b843964cf60afb4756fe398e. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec88baa2-60d7-47e3-8135-2889b1169467.json and https://artists.proofprofile.net/proofs/artist/ec88baa2-60d7-47e3-8135-2889b1169467.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 0x46ced4ba401752a7cf82c3e01d2063aea126674b01995a0b7be5e5f248e6ce0c. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:01:55Z), 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/CBF8B2430851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8a0e37696a885d8bf631bb262cb1768934d9ccec6d5af8b1f71d407c30cfe6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CBF8B2430861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9a8b065a868b783ae755f628f42ff594c24355641469316b006dba4d95b3ab. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:51:42Z), 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/CBF8B2430862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4187bc6d5877a3ad76492cbc17a69e87e6f501e65cd32b4c98ee5783add8f0b0. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:18:46Z), 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/CBF8B2430868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c2f21cf0ece76d2dffbb832f81bcf71e32009713f37eb26f470f308da9a6c9. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/CBF8B2430854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee54c7e35cc63af806e804221083130f60207cedbab69deb9f3bad0440978e45. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:07:29Z), 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/CBF8B2430859.