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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e3628cbeb911f1017834ef19cf47f49bd663ed779549c1bdc929dabbafad51. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea20c17f-bdbb-40f1-8110-1d7ef677fce1.json and https://artists.proofprofile.net/proofs/artist/ea20c17f-bdbb-40f1-8110-1d7ef677fce1.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07eacfa332e4433c7411e807a4afe082f79150a3091f2d4c1cdda3f37cf092df. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/GBMJG2007228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47a52e9edfaef99c99c29ce427e8115df611484d190cdd49bd92e3e3d0a2cf1. 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/GBMJG2007229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e5ba3466509be1909c8b6d3038d5cad95d26e2889bb3d2baac6609de896cfd. 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/GBMJG2007230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389dbbcac3298d70c7542e38782a999e9ae7ef928bfc50d84210fcc643422c31. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/GBMJG2007231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0ce457698686ee6f90966f50c729faa7178bcc7434a788b72bbd67359ef5ae. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBMJG2007232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7da4c0bf9351c924c1da07645a216176895c155b92a84462a266d2dcc7db8a. 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/GBMJG2007233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbf2f9162b252ac2dbc46ad11ae84ac12fb634d8ecc68361a38e6cd7778b8d0. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GBMJG2007234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce9be0b6ba5b15d3a0e90d33cc1587544cdcecedd7ac1f7be4539bbce4e989f. 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/QM6N21977846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7293ea776c82825b34701331dc69caec383fb55af6f186443c3ce21dbb6800. 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/GBMJG2007236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f0a68f0122d7c1d5523a33d9b198d1b1dea8fbb749ac087f59b9c27a2619fc. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GBMJG2007237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06adfb2d48e4a920e72eb4755707a86385b1cf175c348a803bb58fd915d734b. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/GBMJG2007238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa475bc3b2eee77b1b424a51aa7cc9ae29e8f617c2fc25f4c5da382326cb6db5c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES82292879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27792b30aff53bb0af359dec945da798e498e350580690121a78a7a90275f69. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN82327757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb949bcd116ab97dcb26296978c7d33952829e7696b1fd38a761d80c9939ca30. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZTBB2570705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84ea0b822649f88c0bff8764796808c0940059adf2002563fd6b4a4da79666e. 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/QZZ7N2522620.