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 0x7859e263ebe0d2e0b72cef0175e4df334d4816777a4059233fab1260c3fdbbfa. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02739c98-ba25-4c99-bfd9-fe394c001bdf.json and https://artists.proofprofile.net/proofs/artist/02739c98-ba25-4c99-bfd9-fe394c001bdf.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 0x738dae89947460240f1967682ef7a8a00f2c8187aaf4c0c447a1ae545dcc23bf. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/USA4N1201159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe005abd702a9807ddf949590fcffe65b584a0dda613789df863c36cb4acb5d06. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA4N1201164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fa08824cdfe11d25bc6a1aaebfa0a0a08b2cdedf6648939555bb08228659c2. 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/USA4N1201172.
The Sound of Victory with the Mass of St. Kilian
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7564ea2bcc95bed7b9caab40bae0a5dd8dcb752d63f9d9d890b8a90d526dfd. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USA4N1700099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b93f0233316422ee17ed63ced9bd407f83f541d6002f5c50a7782eae51e4c99. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/USA4N1900628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe319f57b03722209962263f6f54bc926766c890ce277b6b278e5091f461387a0. 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/USA4N1303529.
Mass of St. Kilian (Small Ensemble Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2e90ea6555abde5bed91ea95d2a9564ae457aba50562f00fb6199d8d006083. 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/USA4N1400335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c253574e00e2ea10d998bf1fa5fd9f6e7c940fe5de7b2dcf3092df1693ff4a. 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/USA4N1306070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937460b9d90adcbdb5d18bc5162d7047a1d330f98521a0304a070f5f4d11392b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA4N1303760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f6d58d5e0a73cb4c7c502546bde4c9138981463a77d2f3a27c1efca9eec2ca. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USA4N1600342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d25ad50b69d36a9b06ad3c8544135e8e4a1b4f88be34091f8c158c58be898fe. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USA4N1400083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8845f2e7bf538cb93f38f3bea33b8899089f16abc8ddc597c6429bb598c18f4. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/USA4N1306069.
Choose Christ 2020: Communion & Eucharist
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfac7b06b66c7e427065d3497877347d179fea4bc58056ade5cb3d2de2e205f0. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USA4N1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a148cc6d37620b116e046653afa3f5649d1b812b5dade90480eb465ef178a2. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USA4N1400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1bc4ada9892bdfd717cb9c5442ed3c75ef814a96c627e6445691fe24169a55. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USA4N1303764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e9ad69f8532f376f9f775e7dc744d6748805608f726a3996690318105c34e4. 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/USA4N1303616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5014aaf6e3ca756334b912122a1562fd1dc40c27dcf8a6441cae8cb53f629659. 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/USA4N1301513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b29f2d7e7cf931ffb3cecea125e353a9be029485092cd5228316b2b8b28117. 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/USA4N1301289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6906aad8ddec13fe426c54d5bcf01acd37f6d012d93355bec6582fa96bca8c9. 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/USA4N1201318.