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 0xff2ef87ef588c60a57d4d5c6e6e2a3597a1f79afb4283e06df5755034d02ff54. 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/0bfd4ae9-acfa-4b8c-a716-90958211fd9b.json and https://artists.proofprofile.net/proofs/artist/0bfd4ae9-acfa-4b8c-a716-90958211fd9b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Live Under the Sky...83 (Yomiuriland Open Theatre East, Tokyo, Japan on July 31st 1983)
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 0x8286322b54ee0be5dbc6b522b4b09223fd9b4a847365a49ea6e45fb10645a035. 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/DEPI82203454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16740ccd1e89f284c92e1e311b2fb365f515bc0a1d30ebcae205f0a233d52c0. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ESA011766841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3479a30a03c2493e1c2ba7d0e804fa94f858861ea0f8defc41fa472b07f75e73. 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/ESA011766842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a9bf6370a3601ae5658f0287b7dba897452798eb15f68e7b72a11cad96be5b. 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/DETL61605818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e7c82a5ba35e646039b85762e6fba9b597f7d7f0f64540b63fa9a24b49768c. 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/DETL61605813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ebd14ffa22ea664df5b5ec2d50aa7bfaa83bc5f2fddb16a6d785516c308a9f. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DETL61605810.
Sonny Rollins and the Modern Jazz Quartet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddcff057194eaef5f4458caf8f230d544a01c6c2e8c4c35be979571dd4c861e. 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/ITN731009598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d3ed5e43eb12643b59f6fe410eaac2d8b7cc9e6b5aba2ebf779de142145923. 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/DEBL60870217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e279b193bd85ae9266eccd13214270e53f259d47cf836bf1a967a83d2950b8. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/GBLGL0815627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61e82dff150e9558ff01b662c8a19f974e49f0bc992168bc811ffb611064853. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/GBLGL0815628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94ef9d5811f4cbe0d91e68337074d93c0311f63e45fec6c5a524cdfb1f3a713. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/GBLGL0815629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606a005cad349c2fc8f9681a4d9b7cb2369b3e5272aa0285dc1399bfa6f0c1ec. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBLGL0815630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5524d3c6bfcf1c385ba71a77f8ef5a47eaaadced04a8dd7ef889cf5e777d581. 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/GBLGL0815631.
The Bridge (feat. Jim Hall, Bob Cranshaw, Ben Riley) [Mono Version]
Tenor Madness - Rudy Van Gelder Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b0054ddb98b889839da4f820c03ba3def9a70acfa5558da28782ec24614b2c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USFI85600263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca48341d7259a216fbec573a0209d4527bac468e250c09785dfad7a787285cec. 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/USFI85600264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb541063078524c3b1100ca7cc2296c779af5100cf3b42f9714625e29423d1ef. 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/USFI85600265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914fd639c684588fef1bd874424ed090e5889db5cac776357a1b185185da67b0. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USFI85600266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35603e6e699518e65ee1fb2aa16b231f4a3b99f5f50b7becdf6ecb6a52cf7353. 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/USFI85600267.
Sonny Rollins With The Modern Jazz Quartet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd909cc3af368227651f93a80ab8881123cef7c0321d67043f6eda4afeee287. 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/USFI85300142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81573c004cfb3d8c528b827287b90d722e259b0257c6ff37edca9786332df1b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USFI85400178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9315eb2f91666ac25c117680658ce44623f57c9de1204367433ee3bebd2924c5. 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/USFI85400179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67f197a15826070fd30d01d92f2869fbdb1c5efd1e69bbab747b315d09767cd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USFI85300143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9590f008c6483c47653d6b1b7e0580eaa0897d641939acb377cc3450cf1e41e1. 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/USFI85200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7390c2dc39c42efcac9eea91795e741562694dc0bb1577dbee077dabdd8760a4. 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/USFI85200070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81874ddbe7e8c3c7e9afd252677d59b71489fa20277ab087388c397764b54f7. 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/USFI85200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dfff4504bdd18e3e9d47ce2ef4bdc51439861a3546624f629ee65671ee6f5a. 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/USFI85200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7027ca3cacd96e208940fd61537808469190cbdef78a0462aa40a183bd156870. 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/USFI85200073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfad5784ba4eac18441f8a9a62c4713ee18ee765fc8b9fb98a3256b1a03549b. 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/USFI85200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88baa624f7bdecd60afd1ba1dce4ae46035bcb06f89cdc317a4363526c276306. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USFI85200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b12156d0bb5d4d06e9a668fabbdac9ac5cbfcbf8bdfad0093c18f6395de7301. 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/USFI85200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda90cf5b547a63b61b4824449be7273527c3967099b065b2cc816a5c5e8b484c. 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/USFI85100049.