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 0xd2fde97f99aed39ae0dc99fdc50af25419c1549b6e1ac37b0ea9795a8c4bae76. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ce9cfae-d25b-4a6a-a1ba-a18708ef3ab5.json and https://artists.proofprofile.net/proofs/artist/8ce9cfae-d25b-4a6a-a1ba-a18708ef3ab5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cello Recital: Wang, Jian - Chopin, F. / Barber, S. / Schumann, R.
Boccherini / Couperin / Frescobaldi / Monn: Cello Concertos
Cello Concerto In B Flat: 2. Andante grazioso
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 0x96fb999ff60e0fbfd7e363f95dfe403ee1602d0f4aae80e3f0e0c20c8c721468. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEN960200752.
Cello Concerto In B Flat: 3. Rondo (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3749ab09ee084e32a0254f6b9c8bad94ea64b448336c4307a37c435c71dc298. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEN960200753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030b610be81d04810d311d713ded1a1b6f8852a8f636b042c184a9fda4d3ae12. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/DEN960200782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb229128ca2f329c1a37c3ce7634f09cb1ab8714ef139e2c38176e0fe0b6a508f. 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/DEN960631507.
Suite populaire Espagnole: 5. Nana (Arr. by Llobet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd478c36fcb13332eef019fa417de81a248c78ece820085f801b9781a723637e. 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/DEN960631508.
A Collection of Old Scots Tunes: Busk ye busk ye my bonny bride (Arr. by Söllscher)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f6c7378aa91a5aa92a4d14bc241aa697115d36977cd5db800230b2796c92ec. 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/DEN960631501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30a9abd97bde7f7853805a972d52fb70a4891679a4b3951762841f0a8e147c2. 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/DEN960631509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e97818119a704fef4193730109be8d7e7d741b09b89823151573a87148b5910. 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/DEN960631521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e5c43b5519e7186cf796b54c36846a8536e9d71982614b966755f2f1c24aba. 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/DEN960631516.
Kinderszenen, Op. 15: VII. Träumerei (Arr. by Sandquist)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13adbffbff039b733324d1fb3ed35af8ab0182c9ddd51d04bd8ea7cc8a83597. 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/DEN960631518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd0025e404cceda62a5e3d6682eae5480453a1ae896e733a3e563e2354e0bd6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEN960631517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0cc2401c64151c086aca4f740017be2e533b39c86deeb489f6aef60b2b791f. 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/DEN960631515.
Salut d'amour, Op. 12 (Arr. by Söllscher)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51339a779d7e115e48c15063e9bf16d357335f89e129e149703b89f2a7156dd2. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/DEN960631506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e0ab305ee38ae8d1098b7663b2396233186b0cd60a2ce18ed14cc6068b5063. 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/DEN960631514.
A Collection of Old Scots Tunes: Logan Water (Arr. by Söllscher)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1bdbd872240a18d41f190067c476e8dd95d6d5774498591325267937cf9d76. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEN960631502.
The Seasons, Op. 37b: X. October: Autumn's Song (Arr. by Söllscher)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37690aa4b1b342e0c278d4cd99efe401e6eda0f9c1aab9a06f9c4bc9f63c4b07. 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/DEN960631520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ff7cf2d67cd881ae87d066a5c031765289e3f066a227765d486d95ce66da35. 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/DEN960631519.
Suite populaire brésilienne: I. Mazurka-Chôrô
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01503f96ca57122d6ec78b9ce84143d3fa3b6bac4fdc311b1923af255b4f9b98. 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/DEN960631522.
Romance sans paroles, Op. 23 (Arr. by Söllscher)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea8b61d77ef5bc6190a1acf30f76a3a1cc28eed0b6b790d28c4fcb5ebff85c1. 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/DEN960631505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b35987853ff4b1371cb0a25b9dad89e223ffcf3cf1e6ff407bd83fea644f97a. 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/DEN960631523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2953fc2c5f11e0f92cbd112c62022ae4a734fd2c8c391140458172ef4755b9f. 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/DEN960631510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedb10cd8532cc827236dc27b6258f169575264fa26500d25609c1985fabbf91. 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/DEN960631512.
Arioso (Adagio In G) From Cantata BWV 156 - Arranged For 4 Cellos By Jian Wang
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ec2f15b3973b730aa996cc5ad0c054c2527da7cedb99a5562a557008935fa7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEN960301930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ff7cf2d67cd881ae87d066a5c031765289e3f066a227765d486d95ce66da35. 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/DEN960631519.
Sibelius: 13 Pieces for Piano, Op. 76: II. Etude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ff7cf2d67cd881ae87d066a5c031765289e3f066a227765d486d95ce66da35. 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/DEN960631519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b35987853ff4b1371cb0a25b9dad89e223ffcf3cf1e6ff407bd83fea644f97a. 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/DEN960631523.