Mark Howard may refer to: Mark Howard (footballer, born January 1986), English footballer Mark Howard (footballer, born September 1986), English football goalkeeper Mark Howard (broadcaster) (born
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 0x00e84beea798a657f05c6fcebf1264baad07e7d8a9d4ac61c9367b1c8079e31c. 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/4e192657-eea6-4f48-ac99-5e404b771d63.json and https://artists.proofprofile.net/proofs/artist/4e192657-eea6-4f48-ac99-5e404b771d63.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 0x8767ec8397cb674d19761ad4c391b0d54615dbef959494d2325c357699872299. 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/US43Z0910232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186cf28319ae2b13d3abbc9fd6e97636ea16146363fe54b04ee27a087ba404ff. 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/US43Z0910233.
O Come And Sing Unto The Lord - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3444278c622f3d1e88b2401ba4dbd1877bc07739c27ff09b50540c8134426120. 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/US43Z0910234.
I Heard The Voice Of Jesus Say - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86985889e5650b2678f43c8035362fd12e8ee8fd75852b5ab42b2e4721760703. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/US43Z0910235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4f8a73091346af8cc9fccd4b99a312f67eff7da2e63a4f5e8ab9ce5338e0e7. 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/US43Z0910238.
Let All Things Now Living - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8204467111ac04802c33daa372b27e571a469c65f1593c13f04d4c697ef7883b. 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/US43Z0910239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b7f9621d60c31723340a70966b6661bd5a5c7f0b356c2446878216b332d2f5. 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/US43Z0910240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5842c51c5301e5f606e2a534c5348fa0ddebe826a715915d287995d02170c396. 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/US43Z0910241.
The Darkest Hour Is Just Before Dawn - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e5a3c3d07242d9e61cf76acd98c77f623e12d9d5c8d795765c7397e2668091. 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/US43Z0910474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc911b9cea467457f86d82aa059a38d6ecd746f62efb9326923112771759044b3. 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/US43Z0910400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ba2c91ba3b98bc8b886c4b60449bc1308c4b0ab2ec77496b7240f635988692. 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/US43Z0910409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6166ed29c07fee6536f0ce60b4b1b7a27ede9ffebd13bb6b76f6cfa7ef918a8. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/US43Z0910444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0329e8b27bbd46c942583e9819bf9306c3bb189311cbb2123629e23612a10e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/US43Z0910445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d4ea966df2330d08557e8e4a6cfea64be88673d8c781a2c0dcaf5f5e777b1a. 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/US43Z0910454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74da442d3685e01cb51c46d0465dc2db6e7d8f51d2a9f9428b5be7e2057ba337. 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/US43Z0910315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383b216ff6ef9f2c98b36c12d4f3c1d55fc36b0f147cbc91b635af0c447033aa. 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/US43Z0910316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb89fa59ec3a8cffcb8199a8b93046bd23f94c515f62230bb509e3968800cc3c. 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/US43Z0910317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4105f8b2f8d1f7611d01e2405eb039ae3a93b1569712723eae6d4a76ed2d82. 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/US43Z0910318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405138d37ecc27aa4902f026da0e84378652bafa4e39ad7241b392af4092507c. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/US43Z0910319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bcc3bda697c9f262cd9151a09aa9db19f788febc627136a607fc7d76ec46fa. 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/US43Z0910320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7dae9b83b06d95a62e32a80e7856f40bb0369f66a18f08b610bc5c5940f7d9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/US43Z0910321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88e2e6b6937d419b4f2b15ee9fdc3f3055f0a3904377571f391acf90a687db3. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/US43Z0910322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852e14cc9b3e76c9573d7eab9886cffcb6b56995b3ab361dfcbc690f627035f3. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/US43Z0910323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b2a98991be8b722c9d115e701985cd8c0657224300ba32ebf919457d6b158c. 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/US43Z0910324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbe09db39eb530708f6270cceedf7fe49db7e8614f5585c564c0aef64ccf23c. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/US43Z0910325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2ae6f5df276f22302e9d0b0a922dc4a54c577ee7daa3940d24d15a07b00fa2. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/US43Z0910326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f518c202297fea4a1450497443455d761a6f0beb85480c383bb6ec71915cb6e. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/US43Z0910327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143905a108df6071470bfebff5b317a2aa333ae3352c7a8b0f6a868055a4852f. 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/US43Z0910328.
Sling Blade (Music from the Motion Picture)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe06e659cd3484a3341566d9e84671008bc14a6336e38d2b3e0bf1bff841b490. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USUG11100035.