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 0xdb9c7f68e316ce75437bc93e108eea388daf3cc2ec6564d7d08e625269a2e21c. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de3a3cde-d004-4c6b-863c-756d3dbc18d8.json and https://artists.proofprofile.net/proofs/artist/de3a3cde-d004-4c6b-863c-756d3dbc18d8.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 0x05360b268064b1364324d72933edfbbdf3cd8e4920893447416140629dbcd449. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/GBENL2504292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d3f55b312f28a61686fb010be109255b9dd0b42c1d7f3dbec2e0b2e69de371. 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/GBENL2504293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1eb1e81aa198c21d31ce994b354c39cf21b723b5ddb1c9790eb42adeae3266a. 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/GBENL2504294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb79b52b04e7f4bfa1cb2d072f41f9118375581b9261183c6648c56901430b88. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GBENL2504295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6b8d3a5da7d3d68826c1272bfd7a9a94e9ef7098b73aef87ee4669a3264fa7. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:12:19Z), 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/GBENL2504296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18db3b91fcdd234170f71b983ac23533e90c0d6ee3eb5deb9fc0d06b002a1d2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBENL2504297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b4f0103559aaa7ec7dab8fd31a39c51be1d0e3b37e18a85c147164e5274e44. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:04:27Z), 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/GBENL2504298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd51bc5bcf56d0ef1658bb0eb8232c1c5e04d5f13c5150fa003dbf38d008dc9f. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:19:29Z), 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/GBENL2504299.