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 0x2ed4f2df8775a77b929502b6868fa42f7d05a61a61839638f849c87a504774d2. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b9f7396-bb64-48c3-bf44-ea76629e98b4.json and https://artists.proofprofile.net/proofs/artist/5b9f7396-bb64-48c3-bf44-ea76629e98b4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Johannes-Passion BWV 245: 10. Recitativo "Derselbige Jünger"
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 0x87afad5e6e6f419c1d41a0f01f79cfb57040ea7f51a5023b7532dbd9c4497247. 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/CH1262306814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b58e038bb15882a753adc5adabb6188b6797e7648aac934908b45a56de4eb0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEAC61902001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd275a08e3c6148795c77f0beb8e39aca5a3587816b84c399d981b9b66f4cb36e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEAC61902003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d9cf737366ad636aad475bbed8553442bbb9fbb245ba4a72a9f0043a0ecf98. 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/DEAC61902004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff50f7fe622d0c73efe3740862ffc7abd6c2aa46d5db53db5f64e71be9d7a64. 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/DEAC61902005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf822f3c822fb4edf7281693289fc8c938bca98c63498ba996fbce56e33e32e. 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/DEAC61902006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e517b241ca73265c5e1942d070051c982bf239cc6181f3a3cb31ad5f059bb2. 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/DEAC61902008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0a2e21737485b328d331470ad3cd9412ad1c66c408b95e605348fe9c97a3f5. 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/DEAC61902010.
No. 133, Psalm Siehe, wie fein und lieblich ists, SWV 48
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 0x696bf6f174d0d3c831956d1c6536e26fc5b9c225283b65361d45f9ba2a6fa2a5. 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/DEAC61902002.
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 0xedb6c12f40b8688e76ad59ccff1686b203152f46c138437d86cec213307f260e. 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/DEAC61902007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e0dbbb6eb2a47a9fdd1e982150f7a4e92c82247e954afcf91d77758448abd4. 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/DEAC61902009.
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.
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.
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.