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 0x1b139b4f878d14be8c4006945be590f0880f56f2a88d1cce6100ec70da7fada0. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5379083-0c32-4339-8755-8259359d898f.json and https://artists.proofprofile.net/proofs/artist/a5379083-0c32-4339-8755-8259359d898f.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 0xb82191149f6106bb405d216abc4ace588dd3384091e0fd354ec16d7081301012. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZZ762462557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8100dc433e7361ea66f366f0bb8ac171619b0df9025f5cd4e035f967e0f977. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ762462502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbfbdf89ca385bf9ec06e1d0802ba862f893506ffbe91770a7b7f2d51677ac6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZZ7M2457723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15a43bbf7cb54311bdd1626c54f8e18da557fbb333ad856265ed59ece7caeff. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZZ7M2413993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a4014108eb0e2e3fe960e00b39183e3f7ccc2c058ac194764b6cd045702482. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7M2414732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ea61081aada0504b221eee55ab9617e04c74244eb3fca0f705b7332330ddc7. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:32:56Z), 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/QZZ7W2406053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e338d2cbf12c5da099358aea0e444eef77a77af39aae8cebc72866637ab0a8. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZZ7W2406054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eaf689060eab254b3601469782015cff2c8bf52ff801e14e8fb38864ebfe312. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZZ7W2407947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025c253244ac0461f4e9cef3e8dabc6a0581aa18894fef0312da4aaac87b6981. 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/QZZ7W2407948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529aa2dbd51ed65df2c8b85a05ccf184b800e227f31e593d444990e8e585b287. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZZ7W2407949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cb10106efac7caa6dd6dc1c05b303c08a3c4f6555bbf4bf44235c044bdf4e1. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZHN42500862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895d45be541045ac3a209d2a59c568b4a482fe404097c84fcf92bb41cbb06018. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFH2540640.