Matilda or Mathilda may refer to: Animals Matilda (chicken) (1990–2006), World's Oldest Living Chicken record holder Mathilda (gastropod), a genus of gastropods in the family Mathildidae Matilda (
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 0xc3a3f97f7e362b0bd5f331b370a60ab7d685cbd2536808af9dbd775f523f0e6f. 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/431e87b0-35ac-423d-94b6-828a16b84aa9.json and https://artists.proofprofile.net/proofs/artist/431e87b0-35ac-423d-94b6-828a16b84aa9.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 0x883bd78178a580f4ec458fe7dc84d92963b1fc5c2f1c4ef67716025cf73be152. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NOAAC1300302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ca1be02c6f170b8ee2946b7cfed2efedba3bb46258406daee0d61a7b82da2c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NOAAC1300333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee29767e963bf206bfb5a0e7ea640b9e0c039e288fe9be71363c163bb218290. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/NOAAC1400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4023f09db6e31e6b1d84be2ebc0eea030d1c717866710ff5da1eef63927190. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NOAAC1600035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9414fdeecf9e6970e8b07039e0664cfff6309db862e074fda47875fd1e2fafb5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NOAAC1800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bb3d3dd8a571d2944a21aeff76b8205c88f912cd2bcfd496c67441b8e28504. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NOAAC1900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65d21efb2a893641c0818c61ccadccc67a19fc1d29e01dbd0b2c6869d486339. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NOAAC1900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef6703a3e8b2038f8f06ee1c86c6b627fdd492bec47cf19821c887f6b08b160. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NOAAC1900057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87d15bf4f14750414221670028937a4d2b1ca2d59aa1dceeb23f0955882535e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/NOAAC1900077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87d15bf4f14750414221670028937a4d2b1ca2d59aa1dceeb23f0955882535e. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/NOAAC1900077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc1978e82cd685e18e4ac12603c2065e1bd5e41878215a76eb2f7e87c149ba4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NOAAC2100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086470f04910d2b436ef64bbf01862d81af3ea862dce4651ec251beaca98a769. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NOAAC2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1645db2342207b5ea56cfc1b3dcf30223815c1f2725248e16b2ffa9dd13232c4. 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/NOAAC2200010.
Call Me By Your Name (feat. Melissa Horn)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a95933ad29462a8f704a8aae440a7a9390e1d75a64132d88d7a696557dbdbb. 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/NOAAC2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca765585cedbc5791cb3a23e907cac61d64ad8414c99f9680d2b759332cf7697. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/NOAAC2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf624c81de37f07f3edf79b7a8a54531ff72f862b87b6edb4134803c2a4500361. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NOAAC2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc1978e82cd685e18e4ac12603c2065e1bd5e41878215a76eb2f7e87c149ba4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NOAAC2100044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a95933ad29462a8f704a8aae440a7a9390e1d75a64132d88d7a696557dbdbb. 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/NOAAC2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086470f04910d2b436ef64bbf01862d81af3ea862dce4651ec251beaca98a769. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NOAAC2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc6464e58c934349f6daf39dee5b053dc72a07782d1f3c7aa0bb35c843e4956. 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/NOAAC2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c9713edafd07a97d57bac03c73cfde8046843558f72c3be2f527a6a9ee62dc. 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/NOAAC2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1645db2342207b5ea56cfc1b3dcf30223815c1f2725248e16b2ffa9dd13232c4. 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/NOAAC2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7683444a446ae1ea260c68e9974c6f3d0a87d4c91d1502192da20c45531cedc8. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/NOAAC2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b11e197c254efe0fdf57661e388b199836e65872f6ffcf7c80cc7f946dede4. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DKAZA1800064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ca1be02c6f170b8ee2946b7cfed2efedba3bb46258406daee0d61a7b82da2c. 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/NOAAC1300333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53a462b093af680da8460a903567fd0e23ac2f19371cb9dbd2b7b311a6e5956. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLD682002073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b27a4226f25e302e5a27d59bccf0e008cb862d9676ac137788cd735820cee77. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/CAM372100036.