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 0xc1d9af6f4a59ee72b13b171f291d32015b8c61dd2989db409c3d8fdc2a9bb945. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50c16e42-7996-4095-ab23-007e2979a981.json and https://artists.proofprofile.net/proofs/artist/50c16e42-7996-4095-ab23-007e2979a981.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Te Deum, H. 118: I. Te Deum - Live at St. Alban's Cathedral, UK, 1981
The Choirboys of High Wycombe Parish Church
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 0x6b124be6f787c70a8ed48ae459a8ebcde2d22838b2db9c3ef0f22b4a4e5c8884. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058104541 — a six-check JSON result.
Te Deum, H. 118: II. Tibi omnes - Live at St. Alban's Cathedral, UK, 1981
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2462a15a223acc31caa6de3fa2d9a1b42f45f14938f8a1b634a8cc71dfa82b31. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058104542 — a six-check JSON result.
Te Deum, H. 118: III. Dignare - Live at St. Alban's Cathedral, UK, 1981
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe406cf3c0e37facadec54a6d9a5f771ed23fe4f01fe9d75884a6bc1dd394b539. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058104543 — a six-check JSON result.
Te Deum, H. 118: IV. Christe, rex gloriae - Live at St. Alban's Cathedral, UK, 1981
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd079685cde954328498284bc72af227afb3cae6cbf4dc08b14d2b79a97a6c8f5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058104544 — a six-check JSON result.
Te Deum, H. 118: V. Te ergo quaesumus - Live at St. Alban's Cathedral, UK, 1981
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427ff73ba9b6ec2c6923228b4135774ff5b0434ab2e0d5a6c08ed0ad4f3a2d6c. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058104545 — a six-check JSON result.
Te Deum, H. 118: VI. Judex crederis - Live at St. Alban's Cathedral, UK, 1981
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa8f6925546f2b818bea1863cd8773d721ecd37d0a666d53a7999ae40455edf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF058104546 — a six-check JSON result.
Britten: Spring Symphony, Welcome Ode & Psalm 150
Orff: Carmina Burana, Introduction, Fortuna Imperatrix Mundi: O Fortuna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5cae17545d5319766310f2eb5eaeda4fbd74bf5a10b170d7e7d2b033461695. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA809201401 — a six-check JSON result.
Christmas Impressions - Musical Footsteps in the Snow
The 4 Seasons: Violin Concerto in F Minor, Op. 8, No. 4, RV 297, "L'inverno" (Winter)
St. Petersburg Radio and Television Symphony Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d942ebe8ea6444d3c9f26c834ef08780d8ee4d62a64221550647198294f90b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCJG0600002 — a six-check JSON result.
Symphony No. 3 In D Minor / Part 1: 1. Kräftig. Entschieden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4834c67f34f68e54cd525a0c1b77c4d52ef041c560ff88d6bfd8be4c054771af. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059403561 — a six-check JSON result.
Symphony No. 3 In D Minor / Part 2: 6. Langsam. Ruhevoll. Empfunden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0341fa2c519093978573fd890dc5e0493842c66bdd1ac87cfbcf1db6df14e3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059403566 — a six-check JSON result.
Symphonie fantastique, Op. 14: 4. Marche au supplice. Allegretto non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e8ebffc582618e7d6ca5a2b02a27157de5aff0a22d88aa32d7008a67388957. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059305274 — a six-check JSON result.
Jephtha, HWV 70, Act III: Waft Her, Angels, Through the Skies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22360a865b77b36e0a6e2b74052b5d966e30ced0f96814468484769868f7d4b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077941336 — a six-check JSON result.
Away in A Manger (A Children's Nativity)