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 0x107d86018ac40c9956c5056f5637a04dc598cb8022578ef7d57fb6a44ac5938f. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e5566f7-dbe5-4516-b51a-9ba951846352.json and https://artists.proofprofile.net/proofs/artist/9e5566f7-dbe5-4516-b51a-9ba951846352.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 0xc803a0690e381d110282f11787d37c0af8a8672a57f8d9fae13c4a8eb56c0482. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBSLT2414906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f3e2272cf7c106fa1823056f0c12b046e7f8022164d4d4a33aaef02396c22c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBSLT2414915.
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
Four Nocturnes: I. Serenamente - più animato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76c2b1df87b999ef4710ecee31680c62b2d0689a53f1dc746e3832a31c5622e. 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/GBABV0610950.
Lloyd Webber: Music of William Lloyd Webber
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7df7f427b54cb70a2d591bebf250d949fcc419be84f631e56e1236f79e257e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBSLT2414908.
Eller: Sonata for Violin and Piano No. 2: III. Presto
Chamber Symphony in C Minor, Op. 110a: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726270177bb6196836c70389abb7fdf489b178d403bf1519be9e864aa2318935. 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/GBASH0009501.
Chamber Symphony in C Minor, Op. 110a: III. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d2b1b92bc32c7cefd9b0a94999b143a2ad1b42c5246be58526b29723f71a55. 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/GBASH0009503.
Power to the Women: The Best of Female Classical Composers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983638838843d382e248b4b157128663b9906a080e54689b086b3769c8cd61e4. 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/HKI191090201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8013fe5add18f9683b6326f701fb03070495c89f1d69130fc5fdfc87ebb6dc53. 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/HKI199612801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eddfb5caa17a98b3feebce909369bf779f6f1f6173ba0ee1f4ff1ce716ce4ea. 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/HKI199295204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6a34d6d3c28e2e9afc41b550b8672034de1006267383d99552b2c1ec23b6c8. 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/HKI190539101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1314e6ef14d3e1c3447404968586c9a902aa81ddff47d0b32db98e5aa0e966e. 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/HKI190539102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9658ed7b416c9d4046a26cb307948e6c7f6c0a6aa0dec1dc9d48949b6cd8acbc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKI190539104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b4765feac350de7d168232e9c9e7a44253fbf59739edf023853595e8fa16b0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HKI190539106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6105b1714fc082be525b76eb34f36301625cff76bf11eca96c737f8034144222. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKI190539107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf01b249040f01060340d8bdc07fffe5bed6127490d8efe89e8c9ab8f8559258. 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/HKI190539108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b6d54bb8a305827a565e78bb383e1c089aedc39d68d3d5c709d987ba1c505d. 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/HKI190539109.
(Untitled): Untitled Piece for Viola and Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21dda925495fe0f164df567f27635926cbec7306002206ed97cf9d649690be64. 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/HKI190539110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6db1878486771f545aa2f5e3d7b7864ce33a2cf84db23342fdd66d119423c53. 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/HKI190539112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde54106a5a8044a8f0c5d1e3d072c000e6a949b4c53d38438abf86cc36031a3b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/HKI190539103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d55f43116c7f3f1a4f8e25da2f136d5ba801ad8202f31a58495b7f32f256a0. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/HKI190539105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1b28665fc1a9e7c1598f8e8db2a733499e31bfd3d59f976f1f50ce0dbe21a3. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/HKI190539111.
Cheryl Frances-Hoad: The Whole Earth Dances
Scott: Violin Sonatas Nos. 1 & 3 - Sonata Melodica
British Piano Trios: Bridge, Ireland, Clarke