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 0x14706ffb0aa8aff707628d1cc84fa0062b26a266d42ac20233f78a7ec7b5df2f. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0307499f-0fe5-4255-ad86-f04a74d3560f.json and https://artists.proofprofile.net/proofs/artist/0307499f-0fe5-4255-ad86-f04a74d3560f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
"Jesu, meine Freude", BWV 227: III. Choral ( SSATB) "Unter deinem Schirmen"
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 0x91187172f1ff905076cb4500103e30dbfff469a96de025e5413bf8519cfa055b. 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/FRZ149701110.
"Jesu, meine Freude", BWV 227: IV. (SSA) "Denn das Gesetz des Geistes"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19be39ec9c9902ec3c594efc4fd7c6e06fca9d66a9e88a718e8a1b18acf5e0cd. 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/FRZ149701120.
"Jesu, meine Freude", BWV 227: VI. "Ihr aber seid nicht fleischlich"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebbffe79915841b3d62804db27f9ececf8cb08ccb336761ed1bf86cd30aaddb. 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/FRZ149701140.
"Jesu, meine Freude", BWV 227: VII. Choral (SSATB) "Weg mit allen Schätzen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98913c9f21d838f5f53a2a9270ba993d64c536972dab859c79abd9e6fd5a12a. 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/FRZ149701150.
"Jesu, meine Freude", BWV 227: IX. Choral (SSAT) "Gute Nacht, o Wesen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558838233dcfcf310eae0d40b2f74ed34a8da99e7eae713b462bd8187805f253. 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/FRZ149701170.
"Jesu, meine Freude", BWV 227: II. (SSATB) "Es ist nun nichts Verdammliches"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247ec3819213881d6f46cf381bd342c9106c7ad46d6c2fefc75511533f7f4d50. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FRZ149701100.
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
"Jesu, meine Freude", BWV 227: V. Choral (SSATB) "Trotz dem alten Drachen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a5d10b6970f7ee3ba30f6f52064a0de7a1522ac32b8badc624d41f82596ae3. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/FRZ149701130.
"Jesu, meine Freude", BWV 227: X. (SSATB) "So nun der Geist"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2835a7dcba1848e6be9c2028a63720fdc2c8a52a83e800be88e4e609d3e5c63e. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/FRZ149701180.
"Komm, Jesu, komm", BWV 229.: I. Motet, BWV 229: Chor, Sopran “Komm, Jesu, komm”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54be5cb740f13d3f9bc0b91d7b9f023e0800de18eb2e523ba8f5492e6b4129e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FRZ149701220.