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 0x649143b0246792ff5348c6fbc854f8b100f5035647b4498bd373907404cced58. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61afb5d4-b1a9-4a0d-8968-47d957e3cb9c.json and https://artists.proofprofile.net/proofs/artist/61afb5d4-b1a9-4a0d-8968-47d957e3cb9c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x4b5d20f715f511d961739ab6c57c287bfb67140bd7e344f5296882bb2ef4f0bc. 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/NOMPP0701200.
Exaudiam Eum - Gregorian Chant for Lent and Holy Week
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11ec9d1bbf1e966b972ed0e3cf9715baeb966ce6277176a7a7f6699470ce89c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOMPP0701010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12dbf13dfb7e6ed131aaca938b9723815df763fac81bdd46be049e0b6444277e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOMPP0701020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909a4f1d7a982d939efff77ec776f35f8a0f7132bde8e681bbeda5b76a708d92. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOMPP0701030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84dd7d9eba74efabc2d45d178c1abe0d9e5b65c25256660408aa4b37dc2cb74. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOMPP0701040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc4c275c4b64ec585cfbba9953fb93fb6be869e61954b79964e61c3381066bb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOMPP0701050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1e10bf7f80ebf54daacda310d4529026bb139abb1068a06416c27500d1eb40. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOMPP0701060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa3524a4d3e40ecdddff7711911638a329d24d62132fca7a0166eab61771129. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOMPP0701070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92430c504fd765c8d8ea12fc20a85f65cc0d0d8a40eea0aa959827a28b95209. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOMPP0701080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6cd5a144f4599079c998a5178687a671ee27b0b629a26aec0544ea7ce346a6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOMPP0701090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a771a51d9aa9db797c016f4d5defa628d16b872808add12118ca33f75d061a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOMPP0701100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc4ecdb94f2a97eb82b4b31b04d84058d66f25e1092bb6bec8f2440baf58d22. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOMPP0701110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d5d524e4eb3ebd6db7d060d5d728ec483bdd542e774182f3901633ca9d4e59. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOMPP0701120.
Oratio Super Oblata - Praefatio - Sanctus Xii
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0028ef5ee9473f910c2a5c00c8c2caf05239361e5a3cda4c5ca0f0d5d2f9e5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NOMPP0701130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052994d0c2b8fc945c4a57bee81912bfd0d24a5f3cb735f0ee179fa75764580b. 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/NOMPP0701140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51c85e9d1fd7a76a750cbb0516883aacaf333936c3c20560c2d42aab2f767f9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOMPP0701150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac13d5f0211491c894b9a67fc9ba1bea59995bdeaf86005ca06c35287061e0d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOMPP0701160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa02d6f341ec0a616dff198d5f4b387592305c9b1e5516be1ec8d3f19ec56b32. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOMPP0701170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966e26f839479d9abc26999915e0d988b11f37641789f2a78e38c0ed3e5844ff. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOMPP0701180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91585fe2cc13eaee08e573269669a11fa881f45867ffc7bbc028c44ffdd8f369. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOMPP0701190.