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 0xf3eef93c25e9468347be9be66defabe58f3574377521e272b0d1b5efc81be6d3. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9bcf2d6-6e75-4b15-bd18-269bd07ec799.json and https://artists.proofprofile.net/proofs/artist/a9bcf2d6-6e75-4b15-bd18-269bd07ec799.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 0x65be9f88dad35cda5082bd6ec3de692e2785d5574da71f607e8b2234b85af4ab. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:08:44Z), 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/USA2P1127506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d77ec5413cb434b22979dca7aeb56e0e913b81bd10b6a1b50f71154bfcf2b6. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:37:01Z), 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/USA2P1127512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496e5a4fa1add97e0f624945c6fd4929bd694b1fe395aa80e3212a9a489b82df. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USA2P1127517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa155253d60f7fd65858dbb2df3a07ce87077d17a8715eebd6f6d627516a52c55. 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/USA2P1127518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e4330f9fac79750655b31826c66da16a7ef9c0e90650ce5e94e5373c216369. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/USA2P1126639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2873578ad7ba8531322106251cc1cf8b7daf44e829a3db8d577c3345526cd02e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:19:14Z), 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/USA2P1126645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c0b7ba5e97d906703f77fa982d1847610faa39c444b0d195878b02279547f6. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:08:29Z), 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/USA2P1126652.