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 0x8409d30c615e111e070037a38eb0e9614d24c47920f53e673afd2b38d2d491b1. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad0f7af2-a82a-4cb2-a79b-822d9a969cdb.json and https://artists.proofprofile.net/proofs/artist/ad0f7af2-a82a-4cb2-a79b-822d9a969cdb.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 0x1a9dcf6e6667f2d6d4b517f4ede0255e05f1b453d2b11e187d9c5741683dac33. 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/DEUD92361064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78eb0881f8dfabe60c8cf27f2b8e16f6f1cc77f991daeed4b23abba2af439a1. 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/DEUD92361065.
White Noise Arctica - Loopable with No Fade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9108f7845042773567ab640386ae88a8a7d46f68987fab9108a436b708a86fa0. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/DEUD92361066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b79d9a6abc74d681dcc6ee2f4eabd5abcf2e79faedddb688e4a1db91a0839e. 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/DEUD92361067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb40722fa4a40f3107ac8fd7423fd27e20237baf07d5389a60a36ffceaac4bbe. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEUD92361068.
White Noise Water Bubbles - Loopable with No Fade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a69860335937122155270796059fe25b51b0b2a806a26b56b46d8eceeaab8a9. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DEUD92361069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5a53f3c6a65ea8ae50743faf9483ef71a6afe8c49f4c17070a87090f29535d. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEUD92361070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05ae264f70ecf6ac44d316d11f574916f5afa0bfa03f2d027bf95814008d078. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DEUD92361071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd2b27f494a3b171e981d7f97a1a5da661cb14799fd9765b05b03f5f7448a7d. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DEUD92361072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77223597b99f93e5b1e7fd45e9f2264e6a054dbfe5cc9ee6789b49ab937aac08. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEUD92361073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c421cd6f9a70738c8077b0ea3762b6bfe17c16b9d2ca31f9321e371d74744f. 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/DEUE22386997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b1f7fa7d7dc3d9b1ffde6d556ba260303375b060c7fb0944257495af0a863e. 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/DEUE22386998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efa528a416d31a9bb9ba3f03c26c93e3d2ba2a74c352a03e65b06ead13af006. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/DEUE22386999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60c91b91f76ff4f8c55686daaadaba38168f925143c65b75ba17c470b0d65a6. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEUE22387000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46df9f70f0c719286ea9eeb32b952014eef26f0bd17847a6aa1fe7ebc23c5dea. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEUE22387001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd94326e55584a1f6dee85bde69e87a23a1e57571537a9ad89e6978e4a28033. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEUE22387002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbded101ed85207f704cae9e4ba81fc327f22bb47575d5963833792e319eab206. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEUE22387003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91e5d7134851128e7d3b9d75df0e54ae12169d1352338111f410b35b8a1cbce. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEUE22387004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442c8e05122fb103ba29c4037ae17de745e1c38809964cacb6f0b7464d3a861a. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/DEUE22387005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47dc68d6fad4dcbe2ad6d73c6af856a1400fda0c4ede380f22a79f9f95a429b. 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/DEUE22387006.