Matt Carmichael may refer to: Matt Carmichael (journalist), Australian sports journalist Matt Carmichael (footballer) (born 1964), former English footballer Matt Carmichael (jazz musician), Scottish j
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 0x95223e445d19a2c2de579117cabad8cbe12b83cc18909164688fa17b91e8ccfa. 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/21acfeb9-2738-4dbe-af90-86b4c91ae6e9.json and https://artists.proofprofile.net/proofs/artist/21acfeb9-2738-4dbe-af90-86b4c91ae6e9.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 0xa99ae150fc5039ff6a1fbb0c16b07b5aba6bb808a8af3813aa9dcf5594f9b8fb. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/UKNJE2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294e8ae54797b5da21ed361d1bbf953792e0660d89a535f9feb9dd191b300537. 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/UKNJE2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf010083f76b7bd5cf0074fe5b3898fc9227352d3345d63c07740e7e5d0e1b90. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/UKNJE2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0746650a439216745af5b4ebc2d5484692c1ae7c5c2b34c1265ce35807612940. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBVEV2200221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1169d567310057f95ef40f1499e0bec443b3d0888b4e1595f2e11b2db06e032d. 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/GBVEV2200222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6243f724de98db7155746595ab7fbeb407635076736af83653fac7009dbd1fa9. 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/GBVEV2200223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d912546e0083ec2b431c8395f5ae6983ca99ff48294b113a300d11cda25b41. 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/GBVEV2200225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0993524fab05724afddfcc39c906321ed44f5de20d3de8cf41c5431c36cf690. 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/UKNJE2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f679fcb74196030dcb903a903d67dd00ee8c572de0e948e3e85515ca390ae79. 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/UKNJE2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df915f3221c2100dac7b093562de2b79250c739125cfea8440e14e3c956c164. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/UKNJE2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6cbdf9665711e6ee73f5901229719c3f41f060d27db95b496b0a6ff45df702f. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/UKNJE2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3707f7a9f9336d355a8de719c4066b455c30f155c54693229e673e6a7f64442. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/UKNJE2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2412d97e2da7539941ed73d9f64458a8034ab2abcc0dcb75009c40a7372ea11e. 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/UKNJE2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc0535a9bda9cd0e45206c0227be570bca98b3666048af4b99d6f76cc834d5f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/UKNJE2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df915f3221c2100dac7b093562de2b79250c739125cfea8440e14e3c956c164. 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/UKNJE2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f679fcb74196030dcb903a903d67dd00ee8c572de0e948e3e85515ca390ae79. 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/UKNJE2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68151713140eaeab04043e3630a50bbcb1766d29c5dc63f9407c48ffc29e04e8. 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/UKNJE2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be700b0fc8762c16e7e64e2e3cc37b808fca8bc5b3ef9c1ac741ace30cb2fcc. 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/UKNJE2500013.