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 0x13c714ea3d37269236255e0027e655b268b0a2799d3aab08c8e7d9b3eebe6253. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3973c56-ca52-467d-8b44-8d254f2e3abc.json and https://artists.proofprofile.net/proofs/artist/c3973c56-ca52-467d-8b44-8d254f2e3abc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rediscovering Spain - Fantasías, diferencias & glosas
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 0x07909f99807e5700c6ba1802e9a723f362aaeb29104190cf7431a1681300a84f. 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/ES7891301401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb4cf3524a7bf8bc79cbb85f0835ad649465c55a2aad838e1ad4a929f4b540c. 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/ES7891301402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9ee5172a09049e9d39dd7206fa02b16c61216e691066f42382c4c2af10b827. 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/ES7891301403.
Fantasía sobre el Mille Regretz de Josquin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78422e5633090f17f8f1533c33b03b09dec1db6f7768a858343320e1ffd94ea. 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/ES7891301404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c3169218b8e242bd3fbe5041f741b0c58e2c8d98a35d460f62bfc7f6f16e0d. 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/ES7891301405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d86dafdb57bbcdbe495543686983b63536029ff7945164658ba73b15009c52. 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/ES7891301408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceca69ff3a1a7e4bac67b357e480bb8b977db64590ab0e8b256565646271efa0. 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/ES7891301411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2474a2d2f1c63574ff5e6925941910351b74c3fcc98ea90b3dedeea2e2bf8d. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ES7891301406.
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 0xcdfac1e148b5002cf9a07f32ce58a9b8239fc668e61336bb4ebd89575df78105. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ES7891301407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3a56fbdc6bb99f6ed606c5395400c2e4b53cb5cff52fa82f3008d8db74ce18. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/ES7891301409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f80a5970a46d447922c00986815bdd3c10e04b73cd21ec7c4e01b71ac687b9e. 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/ES7891301410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5317fa028fd7196818113bcce0ae858b2b5cc227b1b6dd41c3b0fa9c863707c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ES7891301412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe659d712a8994a1bc49b08e0ce23a39d79d6956b3fbb9435d43d6430222a6c79. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ES7891301413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf33a4b60f561d93a870dc0106ef482f5ef365d361fd8357898e94c331bf8b69. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/ES7891301414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2915915a6921d7af8a1d6f1a05a9539cda826526c48cdbb928de8e15b3533fcf. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ES7891400502.
Erasmus - Elogi de la Follia (Versió en Català)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a55784830878f1e8946b64876838ea35f45c279403870d4d5ddaff71e92fa71. 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/US6R21347935.
Erasme - Eloge de la folie (Version française)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08987957802e59a83f1d0914e2a0004a45cdfdf31c2d294f9ea8991c73b5d09e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US6R21347753.
Erasmus - Lof der zotheid (Nederlandse versie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972a53bf79a3441dc9b994eb5b96708836618c60be31b839c7099402467aadad. 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/US6R21348296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f527e83c8b78875632b64347a03400737ced6b3e0a7c909026b62b4cfd39b2. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/ES7141500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2be4da44c2fba9fd1bb92ffefd0914f8211bca17b0593de3926d6297f01f72c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US6R21347954.
Narration XXI (14): "La Folie est le bien de la société humaine" / Musique: Paduana del Re (Mss. Venezia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9f737e32688fc4491db9701452063418dd1a2ab0892153e21f688cb341d7d1. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/US6R21347767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d94284e3bb7dfd18ec584a84c5f530be05661a4288c57e05b14dc820837f9a. 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/US6R21347772.