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 0x17881aa4aa2b4de8ec8e757e56d8e5923534edfbbf238790aaf3b605c1276810. 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/f3a5b6a3-010c-4df0-bb1a-a582a9d96582.json and https://artists.proofprofile.net/proofs/artist/f3a5b6a3-010c-4df0-bb1a-a582a9d96582.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozart: Violin Concertos Nos. 3 & 5 and Serenades, KV 239 & KV 525
Bach, JS: Concerto for Two Violins in D Minor, BWV 1043: II. Largo ma non tanto
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 0xddffef51ba13d02f3135cf230b94331a80ea8d8240e0bbb932dca2824bc6358a. 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/GBAYC9402536.
Bach, JS: Concerto for 2 Violins in D Minor, BWV 1043: II. Largo ma non tanto
The History of Classical Music: The Best of the Baroque Period
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c27e9b84daf781d377bedf8429dedc644092be95caa6e78a157657e773987a1. 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/GBDYG1703805.
Bach, J.S.: Concerto for 2 Violins in D Minor, BWV 1043: II. Largo ma non tanto (Opening)
The Most Peaceful Classical Album in the World...Ever!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffaaa057118b38915b6f3f6c650addf407dd0adf47e9cf58cd2d8636d53dded. 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/GBAYC8900787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40974887d3cd5bf4e33e27c568df812a152e9cb3ab0df4f6f6cb6f7c7ee54f7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBAYC6500023.
Orchestral Suite No. 3 in D Major, BWV 1068: II. Air
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e4f3d2208ce6e13f1298287972565a91e6464447ddd0690399257c5cec7c18. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T20:54:00Z), 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/GBAYC8906267.
Bach, JS: Orchestral Suite No. 2 in B Minor, BWV 1067: II. Rondeau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41db44850cbe5d28f59fb163a0f5ccf655bb143e8589a72ae930a8243d70f763. 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/GBAYC9102370.
Cantata No. 169, BWV. 169 'Gott soll allein mein Herz haben': II. Arioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5719e6d40e1d2b4d017ea4b6fbdd68f1f5faa71cbc0e32bff9d1f2d2ad77f371. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/GBAYC0100657.
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
Handel: Concerto grosso in B Minor, Op. 6 No. 12, HWV 330: III. Larghetto e piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb867f8079020400d43e7c2630d3017f8b3243dc014805291d17d69a431e8e96. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/GBAYC9900129.