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 0x24acea01523810b3312d2fd4e1cac0df62100a3a14a0ad693863afa4739a3096. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebc397f1-69f5-4476-8b55-eeb53b641a76.json and https://artists.proofprofile.net/proofs/artist/ebc397f1-69f5-4476-8b55-eeb53b641a76.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Graupner: Solo & Dialogue Cantatas, Vol. 2
Soll nun das unschuldsvolle Lamm, GWV 1119/13: No. 1, Soll nun das unschuldsvolle Lamm
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 0x25c23a62ac4a681081b39a8602f4d9273effdb627ebf52064a5915d8ba9825b4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB202365601 — a six-check JSON result.
Geistliche Chormusik, Op. 11: No. 8, Sammelt zuvor das Unkraut, SWV 376
Heinrich Schütz: Geistliche Chor-Music 1648 (Complete Recording Vol. 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb57ed2fcc2b1a267c53a50b62c6376757e1de8578ba3762f6c48878b20543c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB110702108 — a six-check JSON result.
Geistliche Chormusik, Op. 11: No. 11, So fahr ich hin zu Jesu Christ, SWV 379
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd332267fee6d20aed64322d22c5c5b65a68c6f52141b4b54974b845cf84359e4. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB110702111 — a six-check JSON result.
Geistliche Chormusik, Op. 11: No. 13, O lieber Herre Gott, wecke uns auf, SWV 381
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712e5fa28915c7cffde1f5422c5ad36c679ae24e98eaf60248140119f979adf4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB110702113 — a six-check JSON result.
Psalmen Davids, Op. 2: No. 1, Der Herr sprach zu meinem Herren, SWV 22 "Psalm 110"
Heinrich Schütz: Psalmen Davids (Complete Recording Vol. 8)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb30e54ee959a1ba91e55e221000263db5f0f8636e30806d6d752e485cf02fb. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111301601 — a six-check JSON result.
Psalmen Davids, Op. 2: No. 2, Warum toben die Heiden, SWV 23 "Psalm 2"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45380f694a1c554cd5254b1eb8fc35256f26ad848726967fc51a78db62f4f3b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111301602 — a six-check JSON result.
Psalmen Davids, Op. 2: No. 6, Herr, unser Herrscher, SWV 27 "Psalm 8"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244718e1f76d13517c36c87eeaef360255bd7429504cdd441409ffd2176200fc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111301606 — a six-check JSON result.
Psalmen Davids, Op. 2: No. 8, Wie lieblich sind deine Wohnungen, SWV 29 "Psalm 84"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5352e965758f7bf70e1b10454c075deeb2ef4b7607b39ac56b1c20632e002b7b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111301608 — a six-check JSON result.
Psalmen Davids, Op. 2: No. 17, Alleluja! Lobet den Herren, SWV 38 "Psalm 150"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffab217256b0927943907d4a3a388cb51bd3239caee5644291960f755b5b893e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111301704 — a six-check JSON result.
Schütz: Weihnachtshistorie (Complete Recording Vol. 10)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab70147e5404b27eec0611833cdfa45d83af48d08a253b581107ec78ef468b93. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111404502 — a six-check JSON result.
Psalmen Davids, Op. 2: No. 5, Ich freu mich des, das mir geredet ist, SWV 26 "Psalm 122"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f44dc2ee8819f738018403bb37d82b09f893fefce1c36993dbad533fcd4a51. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111301605 — a six-check JSON result.
Psalmen Davids, Op. 2: No. 7, Wohl dem, der nicht wandelt im Rat der Gottlosen, SWV 28 "Psalm 1"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e94efd606706fb47ecda6a565badbcc080dab237117ccc91f9b941e40e092b6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111301607 — a six-check JSON result.
Psalmen Davids, Op. 2: No. 9, Wohl dem, der den Herren fürchtet, SWV 30 "Psalm 128"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020fc68b05908a5fb8cbb9d159c5e7d71f477abfd71fbf5303989c09d40e28d5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111301609 — a six-check JSON result.
Psalmen Davids, Op. 2: No. 15, Jauchzet dem Herren, alle Welt, SWV 36 "Psalm 100"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5915b62f28e5dfe0044b12b578d3b073cd8737e2fd6e2903a76594675206c990. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111301702 — a six-check JSON result.
Psalmen Davids, Op. 2: No. 20, Nun lob, mein Seel, den Herren, SWV 41 "Psalm 115"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a65bf578614cfc0bf967fbb791ee52ce95743127950ffc1d7d37286685fba40. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111301707 — a six-check JSON result.
Psalmen Davids, Op. 2: No. 21, Die mit Tränen säen, SWV 42 "Psalm 126"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6975ea831fe807bee7e44c402d221307b781d829c846237a51aa4fb602cefd1e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111301708 — a six-check JSON result.
Psalmen Davids, Op. 2: No. 25, Zion spricht, der Herr hat mich verlassen, SWV 46
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bace5eb6b97b8b0261927714b9e53c49cba57567159bf3ad3c5fb68b36059cc. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111301712 — a six-check JSON result.