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 0x9b7b292e12eac094dd5a662a13fd869a7a2526bbaa10158cebf3c55fab6b57b9. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aaee1e0e-f576-468c-89ca-1936db9baeb2.json and https://artists.proofprofile.net/proofs/artist/aaee1e0e-f576-468c-89ca-1936db9baeb2.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 0xf835d1d149ce2d7324567cd46fe5d88ad5597ab75b3083c9a440a48a75057a61. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/USHM22298655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a40dc5d4031813dbd2d37a4de099ced5437e9ed49f15c2ebdfc77d2fdb12cd3. 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/USHM22298656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c510f3f94782448e789bf25cf9346b97af98bb5f6449f82e164c7cf038e475. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:21:57Z), 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/USHM22298657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f41a3ee851cebf7cbd6a75ce21308045f2f6339a5d313d2ceb56cbf4fc2a44. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:09:01Z), 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/USHM22298659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d520f7bd628eb38d095acd37290c613b389d0c0b5586bf549854e5f8dab22d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:09:16Z), 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/USHM22298661.