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 0xe6ebcfde67b80d085c13f6a21719f31944ffbf3c847d53784952992fa52b9f7f. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40e76c54-d441-4f7a-8de5-34287df5cb09.json and https://artists.proofprofile.net/proofs/artist/40e76c54-d441-4f7a-8de5-34287df5cb09.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kurt Atterberg: Concerto for Violin, Cello and Orchestra - Barocco - Sinfonia per archi
Weinberg: Symphony No. 20 & Cello Concerto
Weinberg: Symphony No. 3 & Suite No. 4 from The Golden Key
Symphony No. 3 in B Minor, Op. 45: IV. Allegro vivace - Moderato - Tempo I (Revised 1959)
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 0x1650224cc734b9046149a466333ceb856dc1130445b6336a6b602618e5ab09e3. 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/GBLWD1104904.
Symphony No. 3 in B Minor, Op. 45: I. Allegro - - Tempo I - Largo (Revised 1959)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d80bd31308ee275dcdbf9407a04cb6d20ccb44e277d54c2855e0cef6bf9736. 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/GBLWD1104901.
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
Symphony No. 3 in B Minor, Op. 45: II. Allegro giocoso - - Andante sostenuto - Tempo I (Revised 1959)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c9b9781491252a98ba72394a4eee285fdbcb08e8af9a2a2714a3b353ee1f02. 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/GBLWD1104902.
Symphony No. 3 in B Minor, Op. 45: III. Adagio - Doppio movimento - Tempo I (Revised 1959)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac3ef67389d4ef100dbabf436c593765725c9af4e104f91774df503eedde3ac. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLWD1104903.
Weinberg: Fantasia for Cello, Flute Concertos Nos. 1 and 2 & Clarinet Concerto
Weinberg Symphony No. 2, Chamber Symphony No. 2