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 0x7eb92f32583bbc4506d472e14c436db199f2ec20a3b65d67cc4700fcdebefa5b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e434417-4b50-461e-b7bc-fc3fc2f303a3.json and https://artists.proofprofile.net/proofs/artist/7e434417-4b50-461e-b7bc-fc3fc2f303a3.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 0x918ece5603c7b91e20a74d99dbb3e738c6813487f2d9ad2c8407643616283962. 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/QZTAW2215410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a67823033c5d2899a67667daef3d7bd0b4a2a370e2bebc83c85e49e9bc01f30. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:23:15Z), 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/QZTAU2252513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa938756732a42ce1479ffbae2734d1b6a303568e3c8e05262de04a97698555e8. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZRP52313626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d825da5f53c70a7f3b8137b0790fe049d35cc95a47348bc6e3936a9d66032f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:12:47Z), 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/QZDA72459215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c270000b4cfb191286ba7e1500226365fa747c51772bbf470058d925a80fd16. 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/QZWFT2527273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762c8672795848074e92b04fa620aeddb83ac38b3782165b353398ac38b8f058. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QMBZ92452511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f52d2925e0986624944f615462fca777e5737afbf7d32f7095070ca8d52d80. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA052366886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f52d2925e0986624944f615462fca777e5737afbf7d32f7095070ca8d52d80. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/DGA052366886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762c8672795848074e92b04fa620aeddb83ac38b3782165b353398ac38b8f058. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMBZ92452511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762c8672795848074e92b04fa620aeddb83ac38b3782165b353398ac38b8f058. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMBZ92452511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762c8672795848074e92b04fa620aeddb83ac38b3782165b353398ac38b8f058. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QMBZ92452511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762c8672795848074e92b04fa620aeddb83ac38b3782165b353398ac38b8f058. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMBZ92452511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762c8672795848074e92b04fa620aeddb83ac38b3782165b353398ac38b8f058. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMBZ92452511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762c8672795848074e92b04fa620aeddb83ac38b3782165b353398ac38b8f058. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMBZ92452511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7483503fca646c769110ff09411b6f397233176142349166749eb87617a58ff1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB62398944.