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 0x1ea6a1909bfe96047028873b90cfea91a10a9c24a41423ac4dad46814a78f654. 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/5f2c5ccd-ff83-4ef2-aeac-9e23bb73e3be.json and https://artists.proofprofile.net/proofs/artist/5f2c5ccd-ff83-4ef2-aeac-9e23bb73e3be.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Handel: Concerto a due cori No. 1 in B-Flat Major, HWV 332: I. Overture - Allegro ma non troppo
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 0x16847e61767c41f2248756dc608fc7505a176fc4590f19a3b11cbe70d519663e. 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/GBAYC6800296.
Handel: Concerto a due cori No. 1 in B-Flat Major, HWV 332: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376aeac79a4275b97a21a48f82ada3994584dd4892b74bb9ac72cff9f2d429c8. 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/GBAYC6800297.
Handel: Concerto a due cori No. 1 in B-Flat Major, HWV 332: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fb8d16b5ae90cca61ed1b26424dc4f26e19f6b1c2571f2e6e9ffd06a68c63f. 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/GBAYC6800298.
Handel: Concerto a due cori No. 1 in B-Flat Major, HWV 332: IV. A tempo ordinario - Alla breve. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4027bc2f737103a687988cbb076ea506efba48f1f62e2938882715cc1743e7. 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/GBAYC6800299.
Handel: Concerto a due cori No. 1 in B-Flat Major, HWV 332: V. Menuet. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eec93a2c5855c3582c65e78eb0d6da6b9211b9f62312b3da8738c6b66e3a2bd. 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/GBAYC6800300.
Handel: Organ Concerto in F Major, Op. 4 No. 4, HWV 292: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b7a11e3a6f68144dad0cb01e7cf9bc9b7f2f4f2a4f84e266b0e2f3c88b645a. 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/GBAYC9801887.
Handel: Organ Concerto in F Major, Op. 4 No. 4, HWV 292: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5369d832b1f9c9a1dc96cd418335920153136fb122d626fb23d0b78f565d2e. 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/GBAYC9801888.
Handel: Organ Concerto in F Major, Op. 4 No. 4, HWV 292: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87aed58473b486a8943fb2b61a4ebf009c67af4a20fc6c01eaed929274dc2a3. 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/GBAYC9801889.
Handel: Organ Concerto in F Major, Op. 4 No. 4, HWV 292: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad714c29e6890400adb8241e1da821a1fcee7026fc10b7cb3ba5cb594b7df3f. 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/GBAYC9801890.
Handel: Violin Concerto in B-Flat Major, HWV 288: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0617607165c6f485a7bc5a3a96fc9bdde2c96a9b07704c82d794231525269b86. 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/GBAYC9801967.
Handel: Violin Concerto in B-Flat Major, HWV 288: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf90ae99f2a67fdbac283fc821f0510d08d428114604433b9d79bad4fc45a74e. 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/GBAYC9801969.
Handel: An Occasional Oratorio, HWV 62, Marches: Atalanta - Joshua
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d8c8f571c25682ceedfec0bb8a1097ca18425640d2067ae89fce9920eeaa5f. 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/GBAYC9801970.
Handel: Organ Concerto in B-Flat Major, Op. 7 No. 3, HWV 308: II. Adagio e fuga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c8120d1ed129288816c4018c567fa5348a1ea4e446cbcac46e6e728833784f. 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/GBAYC9801924.
Handel: Organ Concerto in B-Flat Major, Op. 7 No. 3, HWV 308: III. Spiritoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf9406a7ba58c322c25748fb247a0156a2f763e04e31de87bbfb6b6bc61449d3. 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/GBAYC9801925.
Handel: Organ Concerto in B-Flat Major, Op. 7 No. 3, HWV 308: IV. Menuet I & II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1332920b6054dc54838ddb654958f4296baa87fcd806689fbb8ec2c862290a8. 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/GBAYC9801926.
Handel / Arr. Mackerras & Rothwell: Oboe Concerto No. 2a in B-Flat Major, HWV 301: I. Adagio - II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf701c4041afaaee5298f6b7ee0542dbb70e936cc58faf3fb931369428aeeadb1. 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/GBAYD9100491.
Handel / Arr. Mackerras & Rothwell: Oboe Concerto No. 2a in B-Flat Major, HWV 301: III. Siciliano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68da3ff8570627d1c1d4a75f55af5e8a739edacc6dbd94194e4f9054c645d541. 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/GBAYD9100492.
Handel / Arr. Mackerras & Rothwell: Oboe Concerto No. 2a in B-Flat Major, HWV 301: IV. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03c7677bc3ff51c472229ac6498e13a74d09f5faddaf422888901d73ec0c853. 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/GBAYD9100493.
Handel / Arr. Hartmann: Saul, HWV 53, Act 3, Scene 5: Dead March
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2598ba2196fa81a265ea57827a3a65bb680476d07cabdaff5d07171837cb94d4. 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/GBAYD9500024.
Handel: Coronation Anthem No. 1, HWV 258 "Zadok the Priest"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1be429a8ea296b4d4a6eadc0ad2d36a7efd5f0040fe6d8402118b9d9fa6e59e. 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/GBAYC9400014.