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 0x94fe03a9e0168e3e3e7be580aea3fc9c405adaeff58567d80ce4bcb1aa5ef097. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9cebb99-cc47-4974-bedc-b84edf9ffb0a.json and https://artists.proofprofile.net/proofs/artist/c9cebb99-cc47-4974-bedc-b84edf9ffb0a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Geistliche Chormusik, Op. 11: No. 22, Unser Wandel ist im Himmel, SWV 390
Heinrich Schütz: Geistliche Chor-Music 1648 (Complete Recording Vol. 1)
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 0x2220c95e389af8db138c7d5712d929fcb20b7b9843ba319e5631814ed5cf86ac. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEB110702204.
Geistliche Chormusik, Op. 11: No. 26, Sehet an den Feigenbaum, SWV 394
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47636ec83afb381112e0612fd76c5d5390dc829ac3c7736c190f3659767f83d. 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/DEB110702208.
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
Geistliche Chormusik, Op. 11: No. 21, Ich bin ein rechter Weinstock, SWV 389
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90448082acd85bf24a90dc8ea5c8d3449dbd3d783a092033ff7edf29f784dfe. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEB110702203.
Geistliche Chormusik, Op. 11: No. 24, Was mein Gott will, das g'scheh allzeit, SWV 392
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054b5c5c5d4fde1e54670b638bc6f98ba8340182e4b33e76b7376f042149712a. 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/DEB110702206.
Geistliche Chormusik, Op. 11: No. 25, Ich weiß, daß mein Erlöser lebt, SWV 393
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7350e4dd686ad132b453b1043c75c7a75cdc98241069c891b6fa8c1bbb8b21. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DEB110702207.
Geistliche Chormusik, Op. 11: No. 28, Auf dem Gebirge hat man ein Geschrei gehöret, SWV 396
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52185ba0f1855720dfcc35911d46a3192d1df6b752a3b24520fbe835c86687a8. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/DEB110702210.
Geistliche Chormusik, Op. 11: No. 29, Du Schalksknecht, SWV 397
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4164514e364a47432a927c54e0cd4ca97138cfdcc8a99b20243489c72bfd9f3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB110702211.
Italian Madrigals, Op. 1: No. 1, O primavera, SWV 1
Heinrich Schütz: Die Gesamteinspielung (Vol.1-8)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6597cdba4c49f0d112e867f9690aea41e79cf523fe8a70dbf0acdd21b8cecdc3. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEB111100801.
Italian Madrigals, Op. 1: No. 2, O dolcezze amarissime, SWV 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5daedb85b47ba66215646f8cefd64cb109068e496b5968ebb877f610b1c1b48c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111100802.