Mathilde is an alternative spelling of the names Matilde or Matilda, and could refer to: Mathilde Dolgopol de Sáez (1901 –1957), Argentinian vertebrate paleontologist Mathilde, Abbess of Essen (949–
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 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 0x2bf48e6e99c48f5b518b88a40bec2d379c247d27598e4c21b4ed9dbf42e8acd8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3082577-c058-497a-85c5-7a98c70f7031.json and https://artists.proofprofile.net/proofs/artist/a3082577-c058-497a-85c5-7a98c70f7031.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 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 0xb5ae46aceaea96d3ebeec6626ba3aa2907cea1cdb7af99bd6df1b104cc53d973. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRZ131481010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cb864c6a597270945762fa45735460a3b6f41e6e8657962a605461dbd77358. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/FRZ131482020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860ed8f3e9866c44b5071cfd4a46344e09f1786eebee8877f71ee1ef9be5be4c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRZ131482040.
Une chanson douce - Le loup, la biche, le chevalier
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b51164502bdc8a044bb464d598c86d0d137c527d900ecd4cd461b3b1aa0d64. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/FRZ131482060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fca2932201a35eda9c0f0bf97a7f25edde1e89352a5a662cce7c2eaa1cb81f2. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/FRZ131482080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e81cf7b75dc6b5e878b3eb4e20349df5a6aa91009db1563cec1f47ebb8f792. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:52:20Z), 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/FRZ131482102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37772ef9f92a5bc38c61d0487122d38e3c0fc1efab867f209c44eb15faf283c6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR9W12213286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7249aea9a93d69dee98508e6465f6686376c3b670003d965afd5fb0145d4b01. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FR9W12213280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb728b681ba99ba846f6910e141f59da3f93f2f4c474543a062929eaa5fa96c59. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR9W12213282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafffd2d78c667dec379ac0205ff5edd5eb4d88bdd092bf97dd25d843c15b67c6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR9W12213276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b2e0f3ed3d439d40c3d217ff472d8bfb7e1a3a12f7fa7a0ce75cab9a421ac5. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/FR9W12213285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d7bc8046c9376ec354e395d8cc55bbe3fe83a4260901352f1d7ea0669e1416. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR9W12213288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afd62e6e9ef3610909dd5593ff1d9d67fbdae38ce1a214525c7e00ad7b8f6b3. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/FR9W12368707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadf6db622931dd531de8c73d11558f2e58c408748a40e861c13b4533f39afea. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:30:08Z), 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/FR9W12213275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872fc24d456a6e46b8e0403493174248286f322b268ed62f1a818a2f5cc67d47. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:52:41Z), 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/FR9W12213291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe74474d40f3b85be680e64d285a992bce300457e15a7d0f9b2b773264596bc. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/FR9W12213277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197ea360103bafa630397b38e6596b95754783dace8782f0589592be72dc8a30. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/FR9W12213278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367036559efbf9816f240de5c25e5b4e95bfe26494faa5d5ab15ca3a9632bf8d. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/FR9W12213279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5aa25ba31529112e0e0a9828b0c08ed9f013767bb6c66cdfd247ba79c36aed. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/FR9W12213283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c497505030528810ece7ee69c004b839ccaf6c71a7ffa7b591e5815de7c3feb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR9W12368706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d0451eda67059b54bb82d7fb969c3dfa90171f8703bd8d20efa55bbf4fd3d8. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FR9W12213284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f41afb7428bee5eec1ea35af7deab8ac8bb7f11473e6b7a971ff29a6baaa796. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR9W12508360.