William Babell (or Babel) (c. 1690Gifford, G., & Best, T. (2001). Babell [Babel], William. Grove Music Online. Retrieved 9 September 2019 – 23 September 1723) was an English musician, composer and pr
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 0xe69e1884a329320ba402df0ac12a2928aaaa34f2e1ed3af6674ef7846aafe285. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6b7fca9-ada9-44bb-8ed1-20472c45438b.json and https://artists.proofprofile.net/proofs/artist/f6b7fca9-ada9-44bb-8ed1-20472c45438b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
William Babell: Nine Sonatas for Oboe and Continuo
Concerto in D Major, Op. 3 No. 1: I. 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 0x4afaf31bd87504276f6a21dbc78dba8d414f6ef469b04e5836402f530d57a8d8. 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/CH1491634801.
Concerto in A Major, Op. 3 No. 4: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x969c90401c1f62b3c6239e9d798c42c35a60043a429bb1a973e3f07ecf13eba7. 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/CH1491634814.
Concerto No. II for sixth flute in D Major, Op. 3: I. Adagio - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1e7955889c5d076bef9896d6866ddadf10a355498f0b252ca26c8ae0807326. 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/FR7JM1962010.