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 0xbac1f0e3cc2aa7a072f3d664f181f2dafa0e02122ac8af2860f7acd2eaed641a. 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/d42fb574-86a7-4d86-9b43-eba852b02018.json and https://artists.proofprofile.net/proofs/artist/d42fb574-86a7-4d86-9b43-eba852b02018.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 0x2a6fc2b809be5ebb0502ae670703a905452470fb4e7c8e3701538b64aad94e1c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFE2476286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb27e5dd8040a1e4c4ab969d68a60d8531c156e8bb61fe52ed940a42cb078342. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/QZWFE2476288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809313611383a8e13ee032755c872be14b1eff68f008520ca09549d2de83c559. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZFYX2578517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3901f81b6b17f36699e990ae3944c8d15f3b81271678a67c296223874b81189. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZFYX2578518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5716b344ad31497b55d7737416a37248896de5e4ef45bb535adbc40745a94bec. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:08:51Z), 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/QZFYX2578521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261fc0d801601cb747b906540aff58d10799681427afdc79d0be42a3c9635da2. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:00:45Z), 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/QZFYX2578523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9518eca980adf71bdbf5345554c1da5557380d667adf4c1e9822f89857fc7f8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTB22593346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e49c80bc9ba47db01fc399dde3b4b7c26fb4556bcf2c7c675f04ea4ba10f00. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZTB22593347.