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 0xd53abe7f5225d77136ee76d56b22c4a0e8f1baff686d5c62c74d160d39a0deef. Chain 2 (Bitcoin): anchored in block 953947 (2026-06-16T13:14:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/231d65fa-4eb8-4526-b194-413462a300fc.json and https://artists.proofprofile.net/proofs/artist/231d65fa-4eb8-4526-b194-413462a300fc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Abendmusik / Evening Music - Buxtehude, Tunder, Grabbe
Alles, was ihr tut mit Worten oder Werken, BuxWV 4
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 0x813565e1f660c1e91e5eddcca6f8451c00fb4a16a69aa94a207bcf586e8db3fa. 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/DEE472400559.
Prelude in C Major, BuxWV 137: III. Ciaconna (Arr. for Renaissance Ensemble by Katharina Bäuml)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68373a2d5c56b7ccd3f486acafae4f9852940063c1105a6db45bf07229f0e140. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/DEE472400560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b77e5467a3b8d54bfc808c0f96b9f914937c7fa7d7c6a08ec938fd7914b6c6c. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/DEE472400561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b4eec1e378bda6ae5e23bd74bb64c8656ff9a4908c052506a7d6d3ba85f365. 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/DEE472400562.
Missa Brevis in A Minor, Bux WV 114: I. Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fc60e38a4f9f8452ce10df3c2483931c6c7b6363dbe072932bcad398139ad1. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DEE472400564.
Nun lasst uns Gott dem Herren Dank sagen, BuxWV 81
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cabbbedb069dfde8e02a09672b277839c2aedd01c3d0891157106322910f21. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/DEE472400569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc255ae85d80a096198912510a38622637096cd0bfb52db6756f85a20d4b9fbd5. 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/DEE472400570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7a9992cde1608a996597ca4f68aca23f5a3a07a999db9f556508c18ce8a22c. 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/DEE472400573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a906c0141ca9d2afd2b9865d4ec3b11322120dd53d12be009448eb63f89f60f. 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/DEE472400576.
Der Herr ist mit mir, BuxWV 15: Alleluia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f248be5aa6c0f583b2d7e0d7440acd37f7d8c8c748939f518011d57338d7ad. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEE472400579.
Missa Brevis in A Minor, Bux WV 114: II. Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81758f9ad753f0cda89c179e6cb25f977b4b08aba48fa797e5f1b0265673e22f. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEE472400565.
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
Psalmen Davids, Op. 2: No. 4, Aus der Tiefe rufe ich, SWV 25 "Psalm 130"
Heinrich Schütz: Psalmen Davids (Complete Recording Vol. 8)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5adb3bf370e7be766e7ab32c27e573a8af7d72dc26c438cd0513b93cb72330. 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/DEB111301604.
Becker Psalter, Op. 5: No. 139, Aus tiefer Not schrei ich zu dir, SWV 235 "Psalm 130"
Schütz: Becker-Psalter, Op. 5 (Complete Recording Vol. 15)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e0a74d8dddc44ec6b45e20d7babee776a880cc7dc62333a8114cfd55653f19. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEB111700404.
Becker Psalter, Op. 5: No. 2, Was haben doch die Leut im Sinn, SWV 098 "Psalm 2"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a30a78f164960507ed4149ef762bc374860e70f18e0b0c2d14ce5ecac0909d. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DEB111700402.
Becker Psalter, Op. 5: No. 130, Ich heb mein Augen sehnlich auf, SWV 226 "Psalm 121"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf128b46197ae8d2b5968be14b34f0d2b461edf2b565ebc7dc8e6a591a6fdccf6. 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/DEB111700410.