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 0x795935947dc6329abd9d98e8f75a2edee811f1a13c0b4f42dd08c8f8536ce4ba. Chain 2 (Bitcoin): anchored in block 953933 (2026-06-16T11:13:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f4502fd-4260-4a96-b68c-7717d4178785.json and https://artists.proofprofile.net/proofs/artist/1f4502fd-4260-4a96-b68c-7717d4178785.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bach, JS: Herz und Mund und Tat und Leben, BWV 147: No. 1, Chor. "Herz und Mund und Tat und Leben"
Bach, JS: Cantatas BWV 80, 140 & 147 - Jesu meine Freunde
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 0xaf073fc1f73915ddabb16fd7a8d7a569b10e472bb13628e59e6bdab4b8f11e20. 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/GBAYC5700116.
Bach, JS: Herz und Mund und Tat und Leben, BWV 147: No. 6, Choral. "Wohl mir, daß ich Jesum habe"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917a1cf5489ab37b0fcbdddc64d1464804a2522d449701e9b8e3bc5b67a70108. 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/GBAYC5700121.
Cantata "Herz und Mund und Tat und Leben", BWV147: 10. Jesus bleibet meine Freunde
The Most Relaxing Bach Album In The World... Ever!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2258afe69cc85982351fab6c0e897ec52bbd02ebb5b2ab600202fa2bef0c89d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBAYC5700126.
Bach, JS: Jesu, meine Freude, BWV 227: I. Jesu, meine Freude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa4ccb25f18b64cd9c610a9f0c4f1e88126eeb825d3b99daff12d2b8ea75f06. 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/GBAYC5700130.
Bach, JS: Jesu, meine Freude, BWV 227: II. Es ist nun nichts
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fba8b1c0aad83f38cf42c35fd5c74de0d38d1398a103c654e320094c8362d1. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBAYC5700131.
Bach, JS: Jesu, meine Freude, BWV 227: III. Unter deinem Schirmen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c2643721a352cecdd47943d68591d1ae090f884b5574168c5713a2d4f143ee. 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/GBAYC5700132.
Bach, JS: Jesu, meine Freude, BWV 227: IV. Denn das Gesetz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d21502cfc9a932ced455b65091c9461a738d16fe5db2010316e62f11a626e3f. 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/GBAYC5700133.
Bach, JS: Jesu, meine Freude, BWV 227: V. Trotz dem alten Drachen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604e2392c9d147b272d4fb9ffb37a0febadd5af6bbc08d7fcca9bb31ea46ba9b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBAYC5700134.
Bach, JS: Jesu, meine Freude, BWV 227: VI. Ihr aber seid nicht fleischlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da30b12e9f89895ccd3f3915ad624ec5aeab8c1730c78e0b4b849b35ad23319. 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/GBAYC5700135.
Bach, JS: Jesu, meine Freude, BWV 227: VII. Weg mit allen Schätzen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0a5de2f6936fc4e902a46f54d67c3e21bd3c3d67056a053ae7ccd2f188a9c2. 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/GBAYC5700136.
Bach, JS: Jesu, meine Freude, BWV 227: VIII. So aber Christus in euch ist
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d08962e6d15089b34c028956fe8509bb988512abc2afd4e6e070e535c46581. 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/GBAYC5700137.
Bach, JS: Jesu, meine Freude, BWV 227: IX. Gute nacht, o Wesen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802a5ba81ce567c09fef63f597ed9ace137208a426cb3bc2905a95db6dafbdeb. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBAYC5700138.
Bach, JS: Jesu, meine Freude, BWV 227: X. So nun der Geist
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e9fa1c1dd556e169e1228ea69b621b5fa9ff8c6ffdfb573c603b1b10fab33a. 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/GBAYC5700139.
Bach, JS: Jesu, meine Freude, BWV 227: XI. Weicht, ihr Traugergeister
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519dd6c337d7d9add706e9445f5476eadd8e92305dc3f54f7bbd40c28e51c199. 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/GBAYC5700140.