Jacob Lee Williams (born c.1983),Serwer, Jesse (2011) "From Harlesden to Yokohama: UK reggae star Gappy Ranks", The Guardian, 7 April 2011. Retrieved 22 December 2014 better known as Gappy Ranks, is a
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 0x8902c483354f6dd807189071e2fd287a0c121a214304f2908c89d486b7a7c167. 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/3708dfeb-75a9-4fd8-87e6-5be084c53be8.json and https://artists.proofprofile.net/proofs/artist/3708dfeb-75a9-4fd8-87e6-5be084c53be8.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 0x325766bdcaaca0fa4367aaddfa928c109b47f862449f30eb0ee98d9b4a8f82ac. 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/GB8KE2324906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3467acb67369375d2a54c03c7b92eadd8d2ad1f83176dae7238a2be44b5d3c0c. 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/GB8KE2325200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9feed9daac9a806016eb735c5dda9948e973f8dab09fd79aaae8ac2d467845da. 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/GB8KE2324606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba0d4a67c08114d2aea7b2f5ca7ee1c333b121e5f83240a76855b22498af55f. 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/GB8KE2304228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f1d5be3b98f4b601f8e5b252bc43e58994723849ee90893f714256c2a1675d. 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/GB8KE2325203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9b61898382b4461bb7fe88affda12db2337e80365d99e4c023021cd9521133. 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/GB8KE2305896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1822be9450066f8c6e8fa8aafaed152e0c845aa0b5551e8bb7f6f6799e1c2f8. 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/GB8KE2325204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1e44071103869f4c3604f13369339b33552f0db9479606f0bddf863f5fb968. 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/GB8KE2308598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4630511910fde7ca88c9a12970f2f669db67151350d2bd28249abdea785ca2a7. 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/GB8KE2325206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ba94d2434d04c32de4f7260ac65ddd71f8a1691f75ec899f671cdc1a1f307a. 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/GB8KE2325207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05a5c4786367b667f984d6e705e08c0499d0afc69d92ad9e2785b198d99c876. 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/GBFG92400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd103878d210120809f78223287a97fe3f4e281146f727e83ffe365f299ae890. 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/QM4TW1945378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2811253a43aab1effb2a82c1e156fbe09a6f065a23cc03f9000674c968b5ee21. 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/USQY51761308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2979a4b1a4dc5fca25357ff244615e6e67a31cc20be5174703f04a2d175ed7d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2P1622341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912327e5aa6b7c9489bccc6514d0f1b8c785ab3b427340f1dcf246a0b1354a9a. 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/USA2P1622342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021124af4befd0477d9a5289c29a2428d09e45d3069c517908cd3e95150aa572. 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/USA2P1622347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c18873ffefd81e71d49b7b07a2cb49dc466af8548f41b47cccd951e86f2e808. 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/USA2P1622349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84829a890143c16e03d260c33b1a87ed433f4a3d66a7f2fe138f14bbee56de50. 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/USA2P1622350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a87623f5f40d47af354cf03db3f8999391b4a5b311498e21ba4431dbbd3218. 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/NZDI11300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf8acbe3287591796b29baf4264652169c8f381a4bdfbe4a887c7a763167997. 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/NZDI11400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff0a1da572edb8c3712946cb4d0cc759b2f3134a1c3e355fc436d2a03d82078. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/NZDI11400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0016959f1c620b40866cedd3cde0d0a0e22bcb94be34fdd5d2c694a8b1b21576. 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/USA2P1342924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0ea3745d534b4063e9c19c1a01a0fd701c86b35f35773e93762d335f5e40eb. 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/USA2P1342926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1cfff7d28c5ce8402750da25515bfef130b82b653f8c9065ebdf6b8c7882a05. 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/USA2P1342932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61ee7531060126cab237408c8b07bc44183eed24db8c6edde778e3b07803b2c. 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/USA2P1149128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11824ee60756e47767a34177dcc6b8776aa7f6019227d04d3c025fec05ef32c. 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/USA2P1149130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f15dc2bd6ed7e76801c0c79cc13b7eb42ef04ee591ce73f2123a5ebe670260. 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/USA2P1149134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9379414f8c2c20ef037bcc893b632ca5c079e6311db17028f7207fce55dd74ad. 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/USA2P1149135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6ca48d5b218950313a1cd9ae3a4af98f6c33fa56d4c9ec347faca6d8c4c55e. 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/USA2P1149136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1df9112dc2f0d33fe76509f677339961de1afb0ddbd25405b4ff184a9c1033. 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/GB7FN0900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6307c3bc7bc284675c91c929e9019b5d2eccd95a631d068f944114012b7f2dea. 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/GB7FN0900039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d9528caa791c03999fa96394c646e4d72b88724fcb8e134a7688e3e1b533a8. 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/GB7FN0900082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fd08df1cbe643a8447cfc2de33621ee6a4a29963a20cbac20abd4038243576. 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/GB7FN0900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe668f1f0612d7d4faa6b1ee4ac8267e8137e83c4a7ddedf47152c088b7add60e. 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/QZMEQ2448915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d6d78e908da39eb40095123899b270fc658c1ded1981955638c2d849be9a99. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAGH2291166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc187d6920411bde367c9cdbff0c00602f47667633229b22d3e797a5f65462a. 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/USUYG1388857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673aa359e7da9eeda532d1ae32a1ada55e564f1bcceaa81174f2162fa4ebbde2. 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/USVPR1600818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175930151e026a9fdc7b9d0c6f5d094383e5c672700fd3941fa457d6ec189c59. 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/USCCW1610611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cbd626285011272d89e6ac4b03510e49d53ce54324b31831033dbc43ff7cc91. 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/USCCW1610591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da4d85a0cc183d7b0a42532de6c7a3d827eec0e3848e47dd98fc81cc85071ca. 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/USCCW1610592.