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 0x0effaa959a26cdc2f12ff72df4aec4c3baf80cc69a1e97df5faf60ce3c53da95. Chain 2 (Bitcoin): anchored in block 953947 (2026-06-16T13:14:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/223feaeb-56b8-4892-8a8a-c522242d1c0c.json and https://artists.proofprofile.net/proofs/artist/223feaeb-56b8-4892-8a8a-c522242d1c0c.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 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 0x051b82f8ef51f94fc9ee585a95719bdff73105fbe9f75b571ae935da35ca1e81. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/GBLWD1001701.
Suite ancienne, Op. 31a: I. Intrata. Allegretto moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcebde488026015385b239de2fa20c77115b5881acb95052627455987261ead. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBLWD1005901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e9fb0f4cc2b408e2f0658ba7d6ce98b52c1365d63128ddc086b803c4ce6290. 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/GBLWD1202001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950f219887728b184b6bf72dbbb0b90451e23662a718676110cbe1a9a66e42dd. 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/GBLWD1001702.
Suite ancienne, Op. 31a: II. Air con variazioni. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177957486e2b16398f31a595ea1767a53b7449f319e9f50357ab5fa06c6cf24a. 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/GBLWD1005902.
Mascarade Suite: I. Holberg-Ouverture. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e1001f9e7aba4d5ea63aae25548301cbc26d14b7d5ddc5e4d45ca05b4d7169. 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/GBLWD1001703.
Suite ancienne, Op. 31a: III. Gigue. Allegro - Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b17c0cc1f2ae5f663d76cdf9a6112b2d7112bc2542bb9db63aa1192b22f1c21. 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/GBLWD1005903.
Mascarade Suite: II. Cotillon. Introduktion Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71810b78c61b745c37a8eeae9424bebc8c27ce363e516ea9e074296c2aff082. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBLWD1001704.
Suite ancienne, Op. 31a: IV. Sarabande. Andante sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d210acfea8d65ee003ecd3e36040d460957641ea35ef79c7871d24ebc5bb3ff. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/GBLWD1005904.
Passacaglia for Violin & Viola (after Handel Suite No. 7 in G Minor, HWV 432), Op. 20 No. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae05febe5831ef56d9defebe9b757938353b2bed9d8f16c181fc5787abbdd760. 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/GBLWD1202004.
Mascarade Suite: III. Menuetto. Introduktion ad lib
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a5a6b4808cd667ac0cd69aaaa8213c027b62886a60f2ba65d1540f6e601a6e. 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/GBLWD1001705.
Suite ancienne, Op. 31a: V. Bourrée. Allegro con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa654a00e4e8f807962a2a2254f75561b1f8078d6496d0194581cb6aca3235e30. 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/GBLWD1005905.
Mascarade Suite: IV. Hanedansen. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c592f674581549bfb7f342a7da6580cb3defb7034bdf18a55cb18c525accb58. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBLWD1001706.
Three Norwegian Dances: I. Allegro con brio - Molto tranquillo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f9f15a22596d3da1ba9f25ec3de4fcb81666cd4cb82cd88bb0470c16eade9a. 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/GBLWD1005906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52095d05e4d3e7d340951ba02cb08888705620ab71005e486cf559c70fa98b8. 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/GBLWD1001707.
Three Norwegian Dances: II. Allegretto - Allegro con fuoco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5c715f9bc0ed820e40cbea6f38ba49c86435b4d5a5cd0be39e93c3d2d098a6. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBLWD1005907.
Fossegrimen, Op. 21: I. Fossegrimen. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c08eb1d5740a60058e7b090e3f01489313c53f7801824959ad263976074ed89. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBLWD1104007.
Mascarade Suite: VI. Molinasque (Grotesk dans). Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade36ad7811c58d4d65e68ff5a0b5f05551b316140b22441fd8bc2166f32cbaa. 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/GBLWD1001708.
Fossegrimen, Op. 21: II. Huldremøyarnes Dans. Allegretto grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefaa560a47006c1b2fe4905b91e0673fbca83d13de444e944c9e23dcaab5d60f. 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/GBLWD1104008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3683e724c286aae4a4635ea297b57a734e3d869aa400857e47f4a3e5162a3a78. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBLWD1005909.
Fossegrimen, Op. 21: III. Bruremarsch. Allegretto marciale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7184b4b99996a380a7571b7a6e5f03d5bf940533f471572193633645f1ae3432. 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/GBLWD1104009.
Mascarade Suite: VIIIa. Arietta. Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e2999e83de69064326cde155f159bf620b2ff59bc4d1d2574457e87eeb9389. 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/GBLWD1001710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef1d618c7f404d73455e9725b911f0ac5ff576d2de4d9974b4be30ad85b924b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBLWD1005910.
Fossegrimen, Op. 21: III. Måneskinsmøyarne. À sa femme Annie. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b53a3e7825234e42275ee4f7bb1528914a22465d4b2ed477d95d71540f1222. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBLWD1104010.
Symphony No. 2, "Fatum": I. Allegro moderato - Più mosso sempre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ef7ad68e8e1a4df2e0df5005315c7de406578e3625dbba39e9fe633540640c. 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/GBLWD1005911.
Fossegrimen, Op. 21: IV. Melodrame og Auds Sang. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a266f4afad5f01253a6708085d16a47dbb4b949b6f3ec6e6916c34378b25ed8. 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/GBLWD1104011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e773954c60fc0b1107bfa802d051729432a99e642554c37edc7b29d64a8077. 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/GBLWD1001712.
Symphony No. 2, "Fatum": II. Romance. Andante con sentimento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ac10915f24904c38300d6c30b7e9696578bf2c8c9a6303658def8c139ffdfc. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBLWD1005912.
Fossegrimen, Op. 21: V. Fanitullen. Allegro con fuoco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f5a95fbc586ffb76218858e44be3d74c16f587c073dc35123a2727baece38e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBLWD1104012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4513a44c25ac52db2a43eb6ff49b4aa4e991b202d3d4d203242765c5137c2b71. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBLWD1001713.
Symphony No. 2, "Fatum": IV. Finale. Allegro - Energico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e83cf237446cce49c689b71867f5ec1ccb00727cfd347f81ffcc2e81711dc5. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBLWD1005914.
Quartet for Strings & Piano: I. Preludio
Pēteris Vasks: Distant Light, Piano Quartet & Summer Dances
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbef08eeec306a6031b0f5a0383058b2d784c483aeefea29899123640322bc8. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SEAEY1952160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9a4af5d7be19e4342f59d7baecca4cf4d987eef3aaf3ae04f904628fa6d8d1. 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/SEAEY1952170.
Quartet for Strings & Piano: III. Canti drammatici
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a4faad6fe4da43693e71404cd9755e51639123d37b2e2616b787c1bef7efbb. 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/SEAEY1952180.
Quartet for Strings & Piano: IV. Quasi una passacaglia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf163ee2080e89633aa41cde881d632a3bb241a0b72e95aa13bf283540bb8657f. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/SEAEY1952190.
Quartet for Strings & Piano: V. Canto principale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8378dfd01929434aa7dbd905d01fc2a747b2209a6b0ac07ca7cd28cceb00ba8c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/SEAEY1952200.
Quartet for Strings & Piano: VI. Postludio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e26c784cd7be8db58bf44611be5e6a13c64e0cd503dec1fd617f2aca8689587. 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/SEAEY1952210.