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 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 0x33568ba877322fab0b67ba1bb33ae1b0575ee88fd197823027c0a8f62e3e1cd9. 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/5971942f-a313-4c96-8f2e-4a1c1da30125.json and https://artists.proofprofile.net/proofs/artist/5971942f-a313-4c96-8f2e-4a1c1da30125.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 0x39f634a81d4fb3cfaef4c64cea6acfa4edd791fb2a179b0f981e12a082cfb873. 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/DKADG1700174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f634a81d4fb3cfaef4c64cea6acfa4edd791fb2a179b0f981e12a082cfb873. 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/DKADG1700174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeaebe2f1d77e353cf6531800999a6d35d6e4bb243d318adf3bb9bcbaa4ea01c. 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/DEA621702143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f8913bb4f90b01f61071a3b1001adde480c199220201149d568b129763497d. 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/DKGL71800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad141784ed1851d5737302ca0a889a258e5948dabdb74b43d0f04e23c9f5ebc. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DKGL71800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c538551a7ca344b0a55db007f404ec700ce000c9486ce5c50970aee76eef7d. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/DEQR41701084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe079c2adc6c2eebf6b11365c6107952b076cfbebfa0bd03cfbc59db05320c52e. 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/DEQR41901234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821ebdcc6983444d867cc53612528f6ef258a70425da183af25c9797a7b19983. 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/DKUM72000808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a2e85522acdd396dbcd7ba6b0471467bd1b86548cfbbcfe0f382ea3ca5f33b5. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DKUM72100270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57afa5056ca3ba967d681957d2a3a89799ba4fc70763b04f110349dd20292d15. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DKUM72100391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a89b5de5c604e6f20d8f896dbc9369946c1b53da21e41e5ca48d00835224b21. 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/FRIDO2310613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d7f0429a828adcfac9c93741d024d0c973a285bed2842fa9a8588ada4f4dcb. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/FRIDO2311396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a89b5de5c604e6f20d8f896dbc9369946c1b53da21e41e5ca48d00835224b21. 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/FRIDO2310613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d7f0429a828adcfac9c93741d024d0c973a285bed2842fa9a8588ada4f4dcb. 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/FRIDO2311396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866f28a0680ecee5f5adbb442214641993ae25961ba5ac17cba289b27482863a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FRIDO2312143.