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 0x8b8c0b7292ee22360a4864b04fe65789f3f33b97aa683a30501cdc5bd78cf66e. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a136fac6-e6a9-48ed-bd1c-8177ca5893b4.json and https://artists.proofprofile.net/proofs/artist/a136fac6-e6a9-48ed-bd1c-8177ca5893b4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Weichet nur, betrübte Schatten, BWV 202: I. Aria, Weichet nur, betrübte Schatten
Heavenly Bach - Arias & Cantatas of J.S. Bach
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 0x0afead34f4b2ce76fca7580ae050472c224d70cfa6907428bf032534e2d4e409. 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/GBELX2208198.
Weichet nur, betrübte Schatten, BWV 202: VII. Aria, Sich üben im Lieben
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08be40506acd0e7bb0bbe0cd291a16c9438441d1bc249c0beb3ad00fcb3df816. 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/GBELX2208204.
Weichet nur, betrübte Schatten, BWV 202: IX. Aria, Sehet in Zufriedenheit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a807caa3260b62779c3153980f1fcde285625636dd4f4b6635ee23ee2ad43d. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/GBELX2208206.
Israel in Egypt, HWV 54, Pt 3. "Moses' Song": IV. To God our strength, sing loud and clear (Aria & Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c42f86b5cd66931aea3fbc030a99c8f829a85708aec148595e551bf98a6a51. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBELX2308634.
Double Concerto for Oboe and Violin BWV 1060: I. Allegro
Bach's Coffeehouse: Bach • Telemann • Vivaldi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71425bbc1555a30c8f6b501dbee2c73c319d19f0bb9801e47baae11aaad62c9d. 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/GBELX2409053.
Double Concerto for Oboe and Violin BWV 1060: II Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380dc30fa6632fd045110f1a0e93eb3cbceeb40de2503ce34868a28aee614f7c. 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/GBELX2409054.
Double Concerto for Oboe and Violin BWV 1060: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea4e3302b22fb8de08aae78cbf479c3c91934bc67113df6dca3e0887ffa2ec9. 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/GBELX2409055.