Mark Barlow (born 16 February 1984) is a former professional rugby league footballer who played in the 2000s and 2010s. He played at club level in 2002's Super League VII for the Wakefield Trinity Wil
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 0xd3458246f8e0012e3f8edfbc25b3896bcadf7d65229689a132703fa775488462. 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/07bb7505-8453-4d55-a98c-06153040620a.json and https://artists.proofprofile.net/proofs/artist/07bb7505-8453-4d55-a98c-06153040620a.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 0xb962c4a460a4083f7b9cafae9e05455b382280c0ff13d3772f030faa3677aaa0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZPLS2002392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047c5bfc0753a8aa4aadf46139d1582d5c595dab2209dfc6e391da11c2b93c64. 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/QZNWW2081223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb02f180b51874b3dec9b3c1761ade13af8f015db5b0802edb6b4820f1a0aea5. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZPLS2002393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa965cf6365222562ad83b19c9d2b18a2db33c8351407178da208ed445e1308e0. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZGXC2100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e0192c8e7ca3736b9d27f895cab7b5c682bcf882999fced5eb6157899a59e0. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZGXC2100135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b4c178f334a3c6f9b4307c53edcf6267a997a680c170be912322708ab26ff8. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZGXC2100137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c52d8133ba461d47e317ab00e34e9a41c0b861d9a79ec6ed3cf56eefd0437d. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZGXC2100138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792b5d7b012c435d55925155b566fa54f4281441c1bd6cf6269fb17a6d3f6f7b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZGXC2100136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281347982e982b4751e39211c933f69831d5fbf286337f10d4ac6ba241572166. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZGXC2100140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734371b9f6874882f5f86c5900a0f6f0f1415797ec5f9576b2179c5007d43b5b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZGXC2100141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd149af1f2965fb1edc5991c434e60c113ca27faadd57aa436a90865638a112c4. 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/QZGXC2100142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7102975641a26c207e49face30861b8a9a9c12aa6f775cb545343a52adce37cb. 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/US25L2000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7102975641a26c207e49face30861b8a9a9c12aa6f775cb545343a52adce37cb. 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/US25L2000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1265086a4ce9cbb4873179384fdfc029180ff6c00aaee99ad13ecdf555f3c9b5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US25L2100278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1265086a4ce9cbb4873179384fdfc029180ff6c00aaee99ad13ecdf555f3c9b5. 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/US25L2100278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b716438674684537ac3f8cf9041aaf098a6a1cea4948c14adf9175406541d9. 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/US25L2100283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b716438674684537ac3f8cf9041aaf098a6a1cea4948c14adf9175406541d9. 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/US25L2100283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23392ae8964e8fe701f458e12483c1ae4ba3b5edbdb438e8889ba992ac6c00f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZMEQ2164950.