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 0xbe214d3daa2e845688ad6edfe03ffbf5c0f774e8c5f27ad50fc143da89459d30. 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/0fdc1e3b-e8e2-401c-a349-8718956cba98.json and https://artists.proofprofile.net/proofs/artist/0fdc1e3b-e8e2-401c-a349-8718956cba98.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 0x3fc4a1e94501a4e3ed27fc7e6f8149401891906052b2f9c84f08a2bf552ac561. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAIQ2453625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc547942385033ff228ae3d1eef3184a6b8eefe7e8e1caa1d1cb5e8ef1c840d93. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAIR2453629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x148cda5b807fe4c7f07a64ad2939b63562cce8de2fb2d9d8f9c65e07b1fcb766. 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/TCAIR2453634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04dd5344dd6ced371943a25e74957b7491c1ce31dceda219bea005f298c401d0. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/TCAIR2453639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfb94a1551b352938629263f71f9ab81507718be97923d429735aadf46dc363. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/TCAIQ2453641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0505e149c5c2de1f7846519520a1fc54d22048db1e67210cf55c7e0d397e7038. 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/TCAIQ2453647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcece6f58dbb62fe7f91de375c4e89d0441ea550c1ff2e7735e5ceaf8c4da5cc. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/TCAIR2453648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b27b053f123743a679d9a121536130ae270df00744cfba2cf17f7880726577. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCAIQ2453650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ce27ef84c38922c49e636572c45e287c5b7f6897792bcaefbdd7039644c8ef. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/TCAJE2537658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19682b85b7bf5d8f52e76c897d5bc669dadc2f235f7f53c9b5641cec02e449b. 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/TCAJE2537666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6ea5fb48603af9c89e3327b3c90cd77a8f327ae098172e01a70d3d940005dd. 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/TCAJE2537671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f42d672fb88da02f0de76e3223a39717532997cec777605d7d862984cebfcf. 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/TCAJE2537676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5274d56ca65cdd1a4e865ca9b2d81693bfca8fdcf5faa2796054a56f619897f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAJE2537684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe29c35cc8f792fead3260a78f6bfdc666968c31c7b9edcec7a1d4452b3fb23. 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/TCAJE2537687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2eafd6753a28be099161aca6bc5e9a3bc70c3a63cf74a9bbd4b72e40206f96c. 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/TCAJE2537694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f8b494b74039bbfbf06702264a6721d3dbc6b6956070ddc95af23232e32f97. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/TCAJE2537696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9023418d30ca7eb655ce36ec3d34cca2a094995898e35b4df493128971fa4409. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/TCAJE2538151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2650d427a07474bf54ec3ffc9421748e0eb99846a0d59799cbb6a4ee72d6f426. 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/TCAJE2538155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3d29d94ed0efaa1e8de9bd3239a87b19a628beaf6998212e4d0494530cb70e. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAJE2538159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cde1d699e728378d30c5438e2028cb32cf02bffd1285787fb3bcfd07c28ab9. 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/TCAJE2538166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d819ed6fa4b9ed6756455e5118c384af181ec29057c77d16a8083166da81bd. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAJE2538170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34243f141c75f21a2846ecfc21cc606e4de70112bf73fb4cd706ccbbf2fa12e6. 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/TCAJE2538183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dac5fbec0d5a13ab7912bd1f999457a50f3eaa54277b103713dd8a8fb83e789. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/TCAJE2538190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb73edef2b9972cdce3d1f243a2fa956980a988ce26b6cfe0e79898883a6c32. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAJE2538195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855d16cc1d2d0aad5d21d424b908dc53715e8394e8b3fa884254aaaaa04fb22c. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCAJI2550534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4b43aa5c718b0f05d96344906181aedfdbbc06cda814f9c83320fa0d066901. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/TCAJI2550543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcafb34241a1664a980bf8641349e7ad150630be5d8634a8a8d239ee61127ba8. 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/TCAJI2550546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0932ea55e0f570931de7e3a55751244d0adcc5b848dffc4922fd842672f828. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCAJI2550553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334c4241aca97bb23096c67c5cbc581c6f1b2bd1c818d426316394d116356121. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/TCAJI2550556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec86a77b4cba800456005e0c4e38de83d3bd392d8778d927d1b8617270a301b. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/TCAJI2550558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bd6d37dd437437674edf9bb497bc52e2372a012175fa30c25fa1e25735f3fd. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAJI2550561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4669aa1f24f3c85783dbba4a1fe6ef3da6c786e5a3a6dbca7183af67656f10e6. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/TCAJI2550564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad00e99a5b477aa8cbe9f5af856a948d969e608d241cf0a979b86bf6f3a8d43e. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/TCAJI2550644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d7066531e3369723d99e0ae7e9dbec79b5f8b128a2d75a201da8630871f24b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAJI2550670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12fc3eb85650ba8be3eab6f1fc995bada56f991a78d67c1f0bce3c314c2c7c4. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCAJI2550676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526cd70e76412d06a51899ee76a06e1ea58fd0a079893d9b630947bc78c893bd. 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/TCAJI2550680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67b995c8a83b2b6eac62b7fe917807e0f05811761cd6ef998d47f0ce52b35d7. 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/TCAJI2550686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d10d57ccac603da1320770fc3bf2de15759d1c0555e429507b788244e877a6. 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/TCAJI2550691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2c3250f294f3f4b26380188533a12a169208efe669783e0ee9571337366fba. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAJI2550695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f38c0d150e6b5c70c97f177ef6d86e71c1c6aef3322f32e71037844bbc0232. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAJI2550700.