Mattis is a male given name, a Norwegian form of Matthew, and also a short form for Matthias. Notable people with the name include: Given name Mattis Hætta (1959–2022), Norwegian singer Mattis Math
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 0x2673a51154f806b5c075d4df1c866e99ebfd7328d059da977147feaec60e1243. 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/3a9ebeae-8df3-430e-a410-1ef2c4a9d7b9.json and https://artists.proofprofile.net/proofs/artist/3a9ebeae-8df3-430e-a410-1ef2c4a9d7b9.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 0x6eff5dd7b1ec5c3b91d7c19f9a722bf8eaf2d836696b84474571a2bfc0eb8b07. 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/TCADM1859613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463f2e1f340ff6ed658473262a84a937c7d2c1906136953e7791568cbc1d8040. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SEYOK1856961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45f5cb464d2c8ee0508fbc24beee073e54797ee10778c7f9a6feb6f0d4ba58a. 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/SEYOK1863337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2299375ad36321390f96c3af1222c938a78210cb1884ef5991ddd06dd4d088dc. 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/SEYOK1863339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1413d2b0e6ffd263c0bf7d94f7255b7e0bb8ef7d949a5a1840ca63e9e7149c42. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SEYOK1930858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0378d64e7c37836f8b585a213f93aae07fbbe03f79f4e1a9a31476c3df9a45. 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/SEYOK2046216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba296985b359e3e523b5638049b1cdef88e0b302a64c4e65704fbf221f487b08. 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/SEYOK2046217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f117f074a7b3fc256f23833f1eec3ac65a0faf14933d0fb91aac4e04fea429c. 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/SEYOK2046218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea7312cf306a4f7fcfdb5dc2500eaa465ee6399d2d94e54bbd07e706090f81b. 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/SEYOK2046219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f1416f98c56ac8161d1525f0a97e0c16ac46b7d58b07d3b225c086d6630216. 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/SEYOK2040720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef65477ac4766350cb2ad0cf7b4b9b1b730e74021d47b124ff8081cc7f4efac. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SEYOK2038270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15acbfda848172be149ee49cc1a0612af2039ea9ef60d21b60b963e02a46d6f. 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/SEYOK2046220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227a2849a869ae67e213406a98d6126119dd8e3e709ff397d678604591b336ec. 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/SEYOK2046223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9bf64fbf3299338a1cf8f906d84fe3a9a08ef8a72f84d29c8ceb35b04587b7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:38:35Z), 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/SEYOK2112277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cedaf738065bf7ebe8bd3112aa149094d24676df8beb6a9f8d8a667ac2b8bbf. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/SEYOK2163399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955968754cf99c7c15a8fd254a4d68513a775cb5d79ab33f779793db06ec2207. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/SE5XG2320901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259c9c4a091ebe6a07418f16454000213d626afc13e043fde3c307116bb94fba. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/SE5XG2274801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf4c3bdfa3d8157bb01ed4fa0cdbc3e9f2df57984c227de7f432dd32b68245f. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/SE5XG2320903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06baa8dbc2e0c109d2d4e5d265a9bfc3eec652a0a8b92580ba7c367882e0f670. 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/SE5XG2301301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bbaf447785adcf2bc614b1b23cf827b4651bf1c859a745c5d138df834d50dc. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/SE5XG2320905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcd8a39392069955d0aabcf7f3f374c9922ff487305894a6f08d8775e5a2dcb. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/SE5XG2316701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc022ffe2e99a9a6437f003d5a84fb23829874d21b46688969157a99be358a3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE5XG2419209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e4ef5c81f5835cde2bb1fa200b918caa1df9e9a62eda7501e06893cea2cbcc. 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/SE5XG2419210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf678d3cb9b36bc046762ae2303969ac33519d45f005ac22caabed9a71abb36b4. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/SE5XG2419211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc46d277bf9a71694a083266b59e78cd90ab6ddb2b2ec600d13a6f29cd5b0807. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:52:56Z), 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/SE5XG2419212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ebe07eb105f087b137ac9278f17e3dd509025f274786724d1cdf94f15930aa. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/SE5XG2446307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71971375158970818d2d7643d8ed24cc0102af38531da97d02a16a71eacad41. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE5XG2437150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c35adacd384102e20eaf3091ce6bb72afaa473f4e0ae8c2a5ed424eb139e94d. 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/SE5XG2446313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7a61583a3f5d66adfeea9ef1a2110796291a996aee2bb5cd0d81e7979ef388. 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/SE5XG2366007.