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 0x49e2466fa16455ba0347e7a2fed7e190c9feb38e5a01bf6c6cd2b8462eadc59c. 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/c20450c3-365d-42c6-8c60-6b43a4bec4cb.json and https://artists.proofprofile.net/proofs/artist/c20450c3-365d-42c6-8c60-6b43a4bec4cb.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 0xaaf832695fb7f30865a3f5a4a3348ab6361e1b760ffa33fb210b371443e698f7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM3DF2253211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09554c39aa62a2b57abad0ba8018edb101d19c9e67f3a310744cc17d6e846a45. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:34:59Z), 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/QM3DF2253212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a4be395135c9951558bfcbee4ad2211078596289f6a0a691be75cf4a295e44. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM3DF2261797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecc950f517ec2f6fe9938f4e05f951bcc3ac7dc5132e3034c7d01da6ba3e817. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QM3DF2262880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab6acbb91f7fc48baede93b78522f0554ef58b76b6582e6d4d43170fbe1eca7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM3DF2262882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a71a60ca022393fb03c191ba65ce7ded5b971825335ca359939f152cebc79f6. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QM3DF2274714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98afd5ef7e041c5e0ec73798946525279c91320abdae3645fcb3589bd2b4ccd. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/QM3DF2274715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7081c1ba3c80164cbef2a66e7bf8042eca811b25345f7c1bc2daba4d27820468. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:22:44Z), 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/QMANG2228114.