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 0xb591708b3ba03e54ca2ffc6f6f7b8942631847e51a7393db8198e6189e8bb5da. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88b78c99-d76e-4d0f-884e-80419af14323.json and https://artists.proofprofile.net/proofs/artist/88b78c99-d76e-4d0f-884e-80419af14323.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Geminiani: Cello Sonatas, Op. 5 Nos. 1-6
Cello Sonata in A Major, Op. 5 No. 1, H. 103: II. Allegro
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 0x0861a2735cc381a9091b365d75ea2a37766caf8cc4ebecf53938e1be66210aaa. 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/DEB202240202.
Cello Sonata in A Major, Op. 5 No. 1, H. 103: III. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682943b36bcbbfb9a1a14f59637e717f9e63573748a97abbe4f770a2a452d71d. 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/DEB202240203.
Cello Sonata in A Major, Op. 5 No. 1, H. 103: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e26df6f528f45fe778f2d8f147a0b207dddbfe070e7651b4ed25ccedeaacc05. 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/DEB202240204.
Lute Sonata No. 11 in D Minor, WeissSW 11: I. Fantasia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d269e3c46fdb329087dbc1111efa1b8359240ff37d87832415a6c0c524ab19. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEB202240205.
Cello Sonata in D Minor, Op. 5 No. 2, H. 104: II. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed1a9697c6df1d4758d408d2b2ad784e3485e91fde9acec76b12386abc4ef0a. 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/DEB202240207.
Lute Sonata No. 37 in C Major, WeissSW 37: I. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8684804e28de90d33fef9d238d84aab446e4d409b564f28742ba9fe653823b. 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/DEB202240210.
Cello Sonata in C Major, Op. 5 No. 3, H. 105: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dd830c29ce477dccf11baa3668725130d9d574095b61e050e925d80e5496e2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEB202240211.
Cello Sonata in C Major, Op. 5 No. 3, H. 105: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8030fba8847256f65de21bcc8975eb78d506ac548a7f0d2b91e50e244d6b3f. 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/DEB202240212.
Cello Sonata in C Major, Op. 5 No. 3, H. 105: III. Affettuoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b10e1e989c33da028ae85890a10a781ab5f6d8aac3e62af061d364053db9936. 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/DEB202240213.
Cello Sonata in C Major, Op. 5 No. 3, H. 105: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20e391c952fcc20c3e6e86284a1607d349e618dcf0566d82fba5f43b4f39493. 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/DEB202240214.
Cello Sonata in B-Flat Major, Op. 5 No. 4, H. 106: II. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a11e9e077e56c58ad46b2e916c9cbf95cb756f65a43130b3e1bf6c94928101e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEB202240216.
Cello Sonata in B-Flat Major, Op. 5 No. 4, H. 106: III. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c93e4eae7b2b5b56cbbc278d72375067e39ed4fbd662b84ac721121a980354. 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/DEB202240217.
Cello Sonata in B-Flat Major, Op. 5 No. 4, H. 106: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd662122e6bb77599d210d7e1b89f10c16e2a4f474b2b0fa673d8a1d9fdf0a8. 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/DEB202240218.
Cello Sonata in F Major, Op. 5 No. 5, H. 107: I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae1fd7ccb3ad6220a37eb7db9660a3fd00fb5899a0d3ba8401577b1288fa6e5. 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/DEB202240220.
Cello Sonata in F Major, Op. 5 No. 5, H. 107: II. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde196b036c7accdd5d3df9d19cdcbc675c79ce88c00d2b0af84f3f45c16ccb51. 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/DEB202240221.
Cello Sonata in A Major, Op. 5 No. 1, H. 103: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c73714b62968f95eebde20e409ad1ebf50b38f2bfe2f4849311ffbbfbfca31e. 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/DEB202240201.
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
Cello Sonata in D Minor, Op. 5 No. 2, H. 104: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab118d469fd62d878976966e8e6b18013a4a3ad0bbab6d046d34b836adbf88b9. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DEB202240206.
Cello Sonata in D Minor, Op. 5 No. 2, H. 104: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da8d1d554ae0525cae5ccdad8daa051ab3db260c9558e3eb63100a14262b951. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB202240208.
Cello Sonata in D Minor, Op. 5 No. 2, H. 104: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad3a93317c0539b42f7db24111e246367f6210dbd51dfa228a16dc5c84c493b. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB202240209.
Cello Sonata in F Major, Op. 5 No. 5, H. 107: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9f4535d0cc490008727923e6326de1cc247ba99aa9aa8d0ce138fa2762726d. 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/DEB202240222.
Cello Sonata in F Major, Op. 5 No. 5, H. 107: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd94333e50752c4b64ac371541aaef6dcf5f07b3ed9529c1b615635cb6630c52. 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/DEB202240223.
Cello Sonata in A Minor, Op. 5 No. 6, H. 108: I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3455f6c2264068488c9de82b7f9eef5fd245bb0687eb7470c51ccda74c5ed7. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEB202240224.
Cello Sonata in A Minor, Op. 5 No. 6, H. 108: II. Allegro assai - III. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5deef651799bb5d7e00929df1082596f78c20f0afc2d23040c6ebebf4f6cd46a. 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/DEB202240225.
Cello Sonata in A Minor, Op. 5 No. 6, H. 108: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a0a0e876400f78f72a5600ae277bb54e13b76d582c7532dad8c45af0a18cb0. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEB202240226.