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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cab1bdba4f8ce23e55083bae9f400d0ca9b6b6bfd67e087c56de03f020f4de. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f612a62-6f3d-478b-8e88-5cac05223fc1.json and https://artists.proofprofile.net/proofs/artist/9f612a62-6f3d-478b-8e88-5cac05223fc1.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f229838291ec2bdefb43680acca41c8822b2651f76ce699de80086501a520b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DKES21700508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fe2cc9e4719fcda72bbb635244b62bc0b38d0d12c6aa8343cee0f8fa326617. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DKES21700505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1f0bb1a550d5d258bfc7b6c3791b7e10ce4f2ccf5c4d9d6f4bd99c162dd56f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DKES21700506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc9da90efe1c958808b6d35e21748491ef3638f1fadcb15464f1384168cf4b7. 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/DKES21700510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2a6a03f444abcbdce7b6f26ef8beff86b01ed15ae7e9ca1b97996797fdcbf6. 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/DKES21700507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb010fea1a06e13149c29372cdb368c2a34fddffd4df3087fe27eb8698282dc43. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DKES21700502.
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 0x9b892eec822037040af254872344a7394e5880477b87f3474de1d2819878000f. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DKES21700512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92762487f4887919172fcf8cadda663fcd0c7a72fba444fa269aaf900a9bcd70. 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/DKES21700504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fd915ccde836270f7bd8c9d4fd4a8b11b75317d462c15c3e50abb43de44453. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DKES21700509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82ef4ec721f52a19ee7ba9093a50ffecb03134007d020e6dd5fc77e7c4d7778. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM4TW1624343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91850fbf33296741cf1cb14bf588f3efd4987fffd93e43860146ff44a8437de. 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/QM4TW1624350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffd7f21fcb914622a65c92029db1d7e0d5d04dd50129a21cfc5d8d032a02631. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QM4TW1624344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123461396218185f50e2ab40a57f67c7762b5393485f86dfd24efaf09bf6d567. 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/QM4TW1624345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e2e51a5807e5492c0a92b2bd5e3632c9d6e60c6465951b10b81599ad835724. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QM4TW1624353.
The New World of Jazz - Naxos Jazz Sampler 2000
Hvert Orstutt Spor (feat. Eythor Gunnarsson, Oskar Gudjonsson & Skuli Sverrisson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9189b2c8033b099621dead414412a1719bd57adcba0b1bf917d04adbb23d3850. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ISC111500501.
Kyllikki, Op. 41 (feat. Eythor Gunnarsson, Oskar Gudjonsson & Skuli Sverrisson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b213b95805dadd64b29b04d6367cfbfac48d2c34dfe93b39e7f8d97e168772. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ISC111500503.
Kjarr (feat. Eythor Gunnarsson, Oskar Gudjonsson & Skuli Sverrisson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249a7bf0016f59c94cb189f3f48bfed6dd7bf2de36c9587c79774fe297c4601a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ISC111500504.
Long Island City (feat. Eythor Gunnarsson, Oskar Gudjonsson & Skuli Sverrisson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55576c43c3962cb91c3ecda192d27a08b578983f27ccfa71ff60e0f503c2793. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ISC111500507.
Enjoy the Silence (feat. Eythor Gunnarsson, Oskar Gudjonsson & Skuli Sverrisson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4357b15b762289cea17e0d7718ad9b56261e8f556b4ceea637f47f8daaa73e61. 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/ISC111500510.
Aftann (feat. Eythor Gunnarsson, Oskar Gudjonsson & Skuli Sverrisson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496edd2ae60e4e54a44e15a6c38e6518d6d2185d45384cc6ee2d38dd87c89b9d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ISC111500511.
Yoonee (feat. Eythor Gunnarsson, Oskar Gudjonsson & Skuli Sverrisson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac362c937350d0e385f1e2f93ad2d4f174ddfed2f2e3c20981daa9719ae203e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ISC111500502.
Leyndarmal (feat. Eythor Gunnarsson, Oskar Gudjonsson & Skuli Sverrisson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302f9a4e690ea8b9b76dce328e21a9f1ff45ffe547633cb9c740842c2ae5b2fe. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/ISC111500505.
Heidi (feat. Eythor Gunnarsson, Oskar Gudjonsson & Skuli Sverrisson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd974e8814327af165d9d1a7462bcaa53bd57225263f87d1038a88dcbc36f0b7d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ISC111500506.
Rom (feat. Eythor Gunnarsson, Oskar Gudjonsson & Skuli Sverrisson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e173495f618eca7abb4ae2ac6549f527178bc1e2942146234c3db58a04465e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ISC111500508.
Intervals (feat. Eythor Gunnarsson, Oskar Gudjonsson & Skuli Sverrisson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12cbfcc24bd4fd395d4de22f1a4185e614ff86552daf0d7c2135b87ad7ebab3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ISC111500509.
New Compositions For Concert Band 79: Leonardo Dreams
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8296401e47839385cfbf70f141702a42938a3d639defe048a7c14cbdfe146ea6. 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/QM4TW2108309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f858a6d99b0e635d6a98174a4c820bf4c11b40a5222502abed1980b2c17015a. 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/QM4TW2108313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3ecb983c88295738fee9bf258eec14d5dfa937d7e08f64b283de9eafc4c0d8. 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/NOX9X3347501.
Ouverture-Suite, TWV 55:D1: 3. Air: Vivace - Arr. for Brass Quintet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d148fe6046eee57640780c8d990408a556a74ab219560012dcec1a86f8ddca. 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/DEPD51703404.