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 0xca28da147768fc3820c447b298f75cd086a8d9fccbda4d93a576df18d182c344. 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/e4c1b231-5c64-484d-bd9e-fe408cf558ca.json and https://artists.proofprofile.net/proofs/artist/e4c1b231-5c64-484d-bd9e-fe408cf558ca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Battle Creek Transit Authority - Live in Concert
The Water of Tyne (Arranged by Philip Harper) - Live
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 0xcc9eebe7beacd2664cff4420ea7058390233c2621d4267ee8c5a9e1320ea8b67. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QM6N21793865.
Funiculi, Funicula Rhapsody (Arranged by Michael Garasi) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f2852d4cea3a19f0e61730e38ccb44bc5d9dae692eaa0fd22e4d4c83ee76d7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QM6N21793866.
25 or 6 to 4 (Arranged by Chris Sharp) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb1329d6b000e1bab9435b7d504289b7ea1d7e15020f2cc62a7fff8c436a14b. 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/QM6N21793876.
A Christmas Festival - 10 Holiday Favorites
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70c5d8991afb417a335e73b2799ee89dacce1f8271f9afa5af416af3289b8d6. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USV291407508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9c26376a998bddde181a67e98c72aebba3679e241a6ebc330f14aa99e010cf. 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/USV291407509.
Symphony No. 10 in E Minor, Op. 93: II. Allegro (Arr. Andrew Duncan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d3c877be19944ce897de3ad8b7904d9af7c33b9f06b98f2f82fb485e53cbc5. 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/QM6P41544727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd633ecb52b795922a5b07b145ea5fa93901a95ecd5d4fc4161027ae0f5838850. 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/QM6P41544729.
Gonna Fly Now - Theme From Rocky (Arr. Jay Chattaway)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab080a0a06b4e0b0853312237cab2a361cb459f92accfad6f94f3dcf306b880. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QM6P41544730.
Lohengrin: Elsa's Procession to the Cathedral (Arr. William Himes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc101d839de1ea7d4b6bb39c9983907deb3ac35307f7705b945c864d7502bf4bc. 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/QM6P41544737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7369438b6680d4c9a42b97be4d3d5ce23eb93a1f86861cbf832dba5532fba07e. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USHM91133539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c00567a95bd08eb1ae65afa727752fca17516732d1b3d555b8308d7efb1fc2. 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/USHM91133541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa951841f6157d77b1cc98dfdc32c7d0ff50ae8bba9a2662f593f3f15c169bbc4. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USHM91133546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec9f27e90f0b3d6f7ea5d95cae6130b7486fe0436c76bb413db92a4db520353. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USHM91133547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c49fd330ff412977f59ef9508b79dbe0bd3458bf971751d9176f80146aad6b. 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/USHM91133548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a5e637c85813d4fb07a4b8844a57da22b48a3effd6711464cbd3dfbfe7a3d5. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/USHM21169046.