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 0x73254caf1df01a1c471e5a0374d00440d96fcd153c0a0dcf3a79ffa0acaf2bd4. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1eb069b0-06ef-4efc-a49b-c96139ba0f13.json and https://artists.proofprofile.net/proofs/artist/1eb069b0-06ef-4efc-a49b-c96139ba0f13.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
No. 133, Psalm Siehe, wie fein und lieblich ists, SWV 48
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 0xf83bc4beb14c99efa26a1b780f1534cceac05e505d278cd46750a010ceb40898. 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/FRU622373610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e1e02ee5a36266c73b8ae5a4143c8ce49e561e607aaf0d5b2591a35a6e9505. 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/FRU622373602.
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
Symphoniæ Sacræ II, Op. 10, SWV 341-367: Was betrübst du dich, SWV 353
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985daa886af07ff5f7b6a09e76d266014e67288628b4508dc841db0d008b1d01. 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/FRU622373603.
Geistliche Chormusik, Op. 11, SWV 369-397: Die mit Tränen säen, SWV 378
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e39673ca6940d2c7ba2b79e7c9e27882a0788c350ea5578d127762ead0ff48. 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/FRU622373604.
Cantiones sacræ, Op. 4, SWV 53-93: No. 6, Psalm Domine, ne in furore tuo arguas me, SWV 85
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f660e4529e109d692c7a672e5a8a174e132f4d178948b67f5363adde893f71e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRU622373606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9195cdf31c44556ab8e9442340d1cf9f35c2efb943dcb76a9241ddb375c6d670. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FRU622373608.
Geistliche Chormusik, Op. 11, SWV 369-397: So fahr ich hin, SWV 379
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe476b66d38bc093b51e8363cf05f1f1a22bbf88de4b5adf9b50def4ab2140cba. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRU622373609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864873b5ad7a095221415fdc66e0bf3680e2cfd68fe84e33fe0a30f8e25cf0b0. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FRU622373611.
Geistliche Chormusik, Op. 11, SWV 369-397: Verley uns Frieden genädiglich, SWV 372
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e95052a130362882873cdad5f338247e3f1316c294ee234cefe492f4af2c29. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRU622373612.
No. 8, Psalm, Herr unser Herrscher, SWV 449
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11617ed294659b797138a97450a2102a94f5e9af5e6bfa27cc269f713a0c0789. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FRU622373613.