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 0x0ace45a8c08b07a9f17752cbb409731125a426e6de3a86da7dfe92d8fb3c9ce3. 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/f4ca00b2-71cc-4597-8e69-f69670fffd06.json and https://artists.proofprofile.net/proofs/artist/f4ca00b2-71cc-4597-8e69-f69670fffd06.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Soldier's Hymn - Dedicated To Art Blakey
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 0x215b6445d939eb5797b368caabce61e918f280d922203af2ee87d7b5534555cb. 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/USWWW0200387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5257339e63eea5959e8218eea0d3a2d5218d81d4c3399ab0d745f5b465f1044. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DES200323002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672d97a2139403196d493bdbb11e213f324c8f5991fce2331772d8ae5ca9e23e. 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/DES200323009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efee59fdd76930175bd00692754725d1667a4ca0a500542e5948d78198a7113. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USSTR0305101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5425655b11762f8a75539c9de5ef0c683e28c066327b251ee454c0a0abe4cb3. 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/USCGJ0918786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ffb2579e10cdd859dba6baacac265d2d0f3ee83038e583f5e399295134f1d0. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USCGJ0918787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfaf52db7d39efe7991624a9fc09e110a870ce23827a383c9f564569aef64d6. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USCGJ0918789.
Plenty Swing, Plenty Soul (Recorded Live at Dizzy's Club Coca-Cola)
I'll Remember April - Recorded Live at Dizzy's Club Coca-Cola
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647ec920b7dd74042ca26a7d4f009b8b26981ded13d91a4bb4e4b67332131921. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/USSTR1010401.
Lift Ev'ry Voice and Sing - Recorded Live at Dizzy's Club Coca-Cola
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8656f69ed4f4a8f043be44e5e26b0abdd8d567c370b04d2047dec75dff932d6f. 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/USSTR1010404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b406f277a28341444529de56e786bb577f0a45bd411961a67429a07a9d2cdf8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM91373648.
I Love You Lord Today / We Praise You Lord
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a55c83a4d6e47bec57ac6651333c206835befe9abdc41c97ff10567778a17f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM91373659.
Cedar Waltzin' ~ Don't You Worry 'bout a Thing
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262647e73b8b8c443741e9c23b6d3b13849bc1db6dcc27a15ffa589df0bb42bb. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QMCAL1800100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c86f68a79683aa9fd53cdafac40c5c6cc8c57b47929dda07648c70d85c36e1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMCAL1800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1393694447ad83c26fb3e7b85a18b253f202c75c57a3c9e0952f6d14e491ebca. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMCAL1800106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082df1e8179923fc20013067d88a3e2db8423fbac0c2924a1fa9545a45335b47. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QMCAL2000071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8a3d8bab7bad221e5f9a3865371eb2bc6fbac1e93c172af347b6761c47bc10. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QMCAL2300005.
Thank You, Duke! - Our Tribute to Duke Ellington
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8f7b57bc14639b63b0e56f81dc2fd3f021e08aace59bb241508fee70ac056a. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/USZ6S0000402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8f20417d81d80deae12732d5860477668ee0d6203db1ec3b5290a33f5f35c7. 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/DES209920101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8402d3eaee108e7afc6de11d7a2fa504da9fc693ad407cf7609d409bed1905a8. 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/DES209920102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c75b60b252b3f9921fe8d4ff04650ea72d5861929ed6a08fffbfecb6678ce4. 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/DES209920103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2459aa00558566c9698b26a217e4879a2f70bf008257ff594da96e0b07d17566. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DES209920104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebf51c7cafbfb1ec6b726dc86340efca7f40aca2259fdeae4f6088e84bfea93. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DES209920105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e19bf758b4c7a7467bc9f65d17d5b08a050f52251b2f85606ce8f94dcea736c. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DES209920106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba4e35302a314271eda74ac1b5cb8ce8837ed06f18452ff898344b6f83f6683. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DES209920107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ca2f8932b1e90f946467715a191b5093255848c4d8a069d59308d3d903166e. 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/DES209920108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f51deb88525ea34d804ba70d28b7ff659f6350f5f8f839c9246f2422b64fe9e. 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/DES209920109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b09433812d1f71eb4b2e95ad6fc511c5a476f576c97124e7b8794df7158691d. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DES209920110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c736aab7b53509eae985d60241e42b3ae7ccb68ce8fb2f5d93b7eeea0649fe. 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/DES209920111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d356977112bb54837338e9acd6cf896b96769e7ca747278b3291f12b52b302. 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/DES209920112.