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 0x3cf0f048c20f408e856d214e45b0a7a19baf45b1ed4ec5c5ab06c3f0f988579c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/185dc314-bba7-4b96-82d4-5c55d7059b9f.json and https://artists.proofprofile.net/proofs/artist/185dc314-bba7-4b96-82d4-5c55d7059b9f.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 0x33b69471535850d0ea78ba81342b38b57bd1307f4491867998e5f0c43763190d. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCADE1752537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6c09256ccc0001bf4c6510c4833bf3c8b3ad4f1f8f273f69f6d3848b4f79cf. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCADE1752542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6300cb088dde09ee00fa09f79dff7e9f15cf7648d056abb0a793b5b7b1d55666. 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/TCADE1752546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc81434cad1ec3c37c8f3fc24c00055f7e370af8f1f7fce90d9f176300f44496. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCADE1752547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e29d4b9e136c2b990d9ae70919f8921cf67f3f906fdac2c9e4dc96f31be5bec. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCADE1752553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3489f6319ad90b4530983bb829eb8d86d2d3a197a5ed531b96935d067d0ea2fc. 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/TCADE1752556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb735794cae9918a46a3564e4019c3e96bf9c89f8bdc8ae50e1db1a04cca657fc. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCADE1752557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8e9eee4a7510b9466119d7529a62394c2a9efa4332df949757aceb6919aca4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:26:11Z), 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/TCADE1752560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754e6900d77180e7d5958f40c59dbec15233cc9700521c72d7f528aa1633e2f8. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCADE1752565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc09179b7109449f2aec156b7661eff185e6d4761b826225f76b22297959e4e. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:16:16Z), 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/TCADE1752566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe364cc78db95b0abc00f8a970185723ab806d187e6b2110a1fa392930efad6dc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCADE1752591.