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 0x6ac138ee3b758df4552b27fe29595f49ece44b2b1b94b21a042cabaca05ec4ba. 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/f1fb435b-3533-417a-b8e9-3ffb425417cd.json and https://artists.proofprofile.net/proofs/artist/f1fb435b-3533-417a-b8e9-3ffb425417cd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
String Quartet No. 1, Op. 11: II. Andante Cantabile - Arr. for String Orchestra
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 0x6ca5419183975b6cec9ac15f3fb10fc6779836d9dd08d8b11a93fad69f1a3fe5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITD541900869.
Piano Concerto No. 1, Op. 15: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b072e8cb2671ad05018dfd200b5c902def6012b3211ae2a0ed8218cd86a53d. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/ITD541900892.
Divertimento in B-Flat Major, K. 137: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69821a2767b8d0ab9b06509b48e418e1cbdf486a39efacf201dd5226bd654d19. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITD541900870.
Divertimento in B-Flat Major, K. 137: II. Allegro di molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60ed6e72571d170bec10998e82263d9c409992afd22c0e5d389020b2098bbf4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITD541900871.
Divertimento in B-Flat Major, K. 137: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7379b78b8cbd8b4ebfde1204d8b1a9ecdc68f9b01ec151175c31c1ff7b68ee0f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITD541900872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8306287fcb1091d201907d5ad75837654b4e5294b453e9e1ee0346a2b90dc7a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:30:33Z), 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/ITD542201227.
Piazzolla: Adiós Nonino (Arr. by J. Bragato)
5 Lieder, Op. 49: No. 4, Wiegenlied - Brahms's Lullaby
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4ad03d70c34b9d6bbfc82a39e6b57444d6b71b68e1fffd2bbf5e16934889a0. 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/ITD542101454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bba25b4e10132de7b83533822a667f1106fc9f8f03b25954d43680dad4fd8c5. 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/ITD542101415.
Trois gymnopédies: No. 1, Lent et douloureux - Arr. for String Orchestra by Matt Naughtin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1ca9de387e092c44b6822382906197527c8f43a3550273652f8f23d1e551cb. 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/ITD542200053.
Trois gymnopédies: No. 2, Lent et triste - Arr. for String Orchestra by Matt Naughtin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd9294d7c7e5bdb3a96d97275e65a3fce282588045691d7e969329f63b79f26. 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/ITD542200054.
Trois gymnopédies: No. 3, Lent et grave - Arr. for String Orchestra by Matt Naughtin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ec4d8b31aec31156e8999e59207b7d85195a1151e6df903846dc067193eef9. 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/ITD542200055.
Schwanengesang, D. 957: Ständchen - Arr. for String Orchestra by Matt Naughtin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42e4e33b9887f2882f38656a8b87029c0c040bb8365c5e6b9d2fbddb414e968. 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/ITD542200328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7d8634133d3a9a83d1a6c34c5c3d0aa185b33064c22bc6128d81d81f02bd31. 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/ITD542101557.
The Snow Maiden, Op. 12 "Snégourotchka": X. Melodrama
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa5a474b2714a69392ab99d8fa0a94fa3b59f655abe92f186880983bb3d0130. 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/ITD542101526.
Serenade for Strings in E Major, Op. 22: IV. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e5e98f280d4841dab60d2ffbb7a9585d1a33254a491d00992c543accb6647d. 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/ITD542101410.
14 Romances, Op. 34: No. 14, Vocalise - For Cello and String Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3880f24c84aaad7e5bcf1aa95f0693ee65d51f3939c4c3ba14e20c84865485f. 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/ITD542000137.
Gianni Schicchi, SC 88: "O Mio Babbino Caro" - Arr. for String Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22971be013cd1d2098c1d984cf119e588d50a714282b42d9a060faa06acb53ae. 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/ITD542200335.
Rhapsody on a Theme of Paganini, Op. 43: Variation XVIII. Andante cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9053fb46efc0363174f9eb19d4947e0c79eefe2dbf4d179031218053d3fe3868. 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/ITD542200326.
Suite from the Gadfly, Op. 97a: VIII. Romance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86615fdab08d20429c5b4748bcbeaf39b0ecdd970dd8c14c0bdbeec65015266b. 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/ITD542200327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd70cc0a22dd63f8e794cb58e774b0ab1f1c8080d5122ef20a58cda7245ef3c. 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/ITD542200324.
Orchestral Suite No. 3 in D Major, BWV 1068: II. Air on the G String
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811e5dfcb6413dc482aaea1c784c94c99f36d4fbe271e2a6d206b074a5596864. 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/ITD542001993.
Thaïs, DO 24, Act II: "Méditation" - Arr. for Cello and Orchestra - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde604a3222de1a3df7d42ecb3d007ab08d5be27e1cfdf943c68823716ef98eae. 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/ITD542001777.
The Carnival of the Animals: XIII, The Swan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed7c0f9daa59ed6d0965351dc520ebebdcb85ca8ec62d5b96f362f0e73489c0. 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/ITD541900874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e38c9be26161a046a4289ad46733b0540152fde2e470aae219d37b19a0ec49b. 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/ITD542001537.
Divertimento in D Major, K. 136 "Salzburg Symphony No. 1": I. Allegro - Live Recording
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a15483cafee51d1d77cd5287b6d8eabf1466649add2164255149889476f03b. 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/ITD541900010.