Matt Duncan (born 29 August 1959) is a former Scotland international rugby union player. Rugby Union career Amateur career At club level, he played on the wing for West of Scotland. Provincial car
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 0x5d7a117ac88715afb318d5e227c0a928955b44f09b17ed850eaf205e7a8feb41. 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/396a73c5-c959-44a2-94d5-ad84bd9e3733.json and https://artists.proofprofile.net/proofs/artist/396a73c5-c959-44a2-94d5-ad84bd9e3733.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 0x08b6c20bc23ffaa4a220c1643c6b8fe13b0d7a06e5111bce4639181153f336a5. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/USQY51336644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7683e924254df72beb2d13606519c3c32531fb3b7000a1f6c0a9e5dc9d200f3. 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/USQY51336650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0684335efb0520d729c075ac0db8967557fb4354f7aa5cef2b72420d5f40ef11. 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/USQY51336656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d478986efbd3331f3c726893ec1f5c13e843b2f484ea2c932c6b9dc9e94e7b5. 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/USQY51606293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4d2181a1fbe31fe6064a7fc2ff93be31190c1a0593e30b12139fbb9c708067. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USQY51606296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b842c301a3e3524e0b9a3ddcc269f43cae3b34f2b051e66bc22d7970b6346b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USQY51784736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5932a8d90e6ac97f64190ddaeac0873584e6e66d5b152d805a942bcd6fd54814. 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/USQY51784737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae670bc1f704943430c4c5d570b9f964994268b311e3903b65d1ad4739c7b8d. 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/USQY51784738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a20418717ea3d29a881a51fb40c22fa8a3e36d58331e30f045f1b88bf9ce8c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USQY51784739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d21601ce197aef9b755bfce562936272c6505d20ce98e175c024991cff28860. 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/TCAFD2024294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6342d4216e340e2a6fabab6cccdb1c5b0dcb753fd09c067db949063ebb2fc9f4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAFH2079081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992233cfcc6ac9b93542651007cf14ef0aaa75e83945ccc1ba3c860f52b4690d. 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/NL8RL2330489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb669217e93a132aee4b4a9e66bd419948610608076f896cea918836e5ec28a86. 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/NL8RL2429745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f09ea5c841b90f00b21241d20d18349022441f1d6bdc67a53a6e65d948e07e8. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/NL8RL2430910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6fe2aaf62cc3b26186a9f10b3cc4d2dae3c13f1a0d25df30461a4c90539125. 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/US96H2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942474259a10f4af225e8e3f9520e614e394c4ad4de1301209ead7d1c2290a5e. 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/US96H2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1e19765282fe97c6aeab8a4d84f266bd7ab3f900a33f153eddae65ce08c245. 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/US96H2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da500d90206d9bd35919805d72f60a5cae8383ee630c42e4c0191091819fdc1. 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/TCAFH2079044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734c02d4d0b3c01b203db7c6044d0c34dbe26379132364e780f0617ce346127d. 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/GBWUL1825319.