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 0x7550e90057accb0117cd3f90e740bf030b7c702cfe706318d60afb091e87c58c. 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/e6666b62-b0f1-4a50-bac8-ffe6713ee787.json and https://artists.proofprofile.net/proofs/artist/e6666b62-b0f1-4a50-bac8-ffe6713ee787.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 0x9582e169f010fa644a95b4ec84133ec622283db94b34540a0d37c3cf3ac7500e. 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/QZ8LD1919345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f52be2deb2960368b6d6d37599c7f5f9f2f626d073ef5e654cbfa827a6d38e5. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZES61907653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3f3bc751dc21aefb6321c55ef4fe222e47ad30314ff967e921413ac2e577a5. 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/QZFYW1958175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431b4689147d45ed03cad5bec736ea0671fa720ff080ec0dded80f6e640e03ba. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZFYZ1904677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a4895dd36bf7b9ee171b1ba94c978e11ae2e44ffef256edbaf6fd3c76d16bb. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZFYZ1938911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b91e81a0e9b4023e807480563b4dfeba5829dbe6dc3a977601a6ae93101773. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZFYZ1938913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaed97e1f978dda9849610018608edf47404481b512b0aed5e1a2fd1b2727717. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZHN41944661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3060d197607e4e73656146a240980713604f738d1194123d175c802ff30a173f. 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/QZHN81908490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058013911fb93be33298e0eb79b5d35277f9a3afebf963d9bb3fb30ee1296ce7. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZFYX2013304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18826f79d3e19005d812cb63787bffcc0e30bf3424ea1b17aaaf7b3564282aa0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFZ22017253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace5c09f258ad6665586928e854dc1048d02ced74c076288e3c82d80c79fdf1f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFZ22017257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4400fe5872096d1abee9630b98b2abc12c7e27a144df364b61d08470af704bb. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZFZ22017258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa211601db986e96069a10b0cca059ff1ca5de0eb66871273af35dc884f51ca8d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZFZ22017259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4b7d4d86db45d41de54eaf9290ab29d944b54ab29b490cc762d70fc2fffe0d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USLD91727276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe9fa7b3a426c230ba4a45dd610d531c52707e93cfb00049e7a13214e85fa47. 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/USLD91727938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28551b13ad3ac3ba4a5aab84356ae516cc430b73fffb732d84ee0f68ac71606e. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/USLD91728246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b2e8b53af0718971ef38a8e857f05af77969974ba8fee88a95b47905b3fa0e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USLD91728658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2fd8757e15f629c62a9daf7153649fe7777cc62b1f5e11fcdac1bae5dddcea2. 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/USLD91728900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84c0c5b4b34f0950521ba55f80df277a2c1c40e1e3d667c508dd99d7927a11b. 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/USLD91728901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3958f943e99afe9f4972f5dd4eb53239571c4dd95bf24fc428484d9d143bba0. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/USLD91728903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119cee72a754026771ef66c874085b1b73be9dadf51e5d73b902ae73fe5777a2. 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/USLD91728904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89057e47ee5b35c1f79dda24f7f59b346449cadc6fb9355cfc22eda3b336256. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/USLD91730688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ea97186c6f5087d559298b4442dfc14f88e8caee16aadc779598a473828858. 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/USQX92102662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8c104888d40e67d68bb10050fca71df8e59c10eaed24d85744e82786d58223. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USQX92105344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be97841e57f45c0071736002c0c199fdd174dd64b3142d23b87aed82176d9c8. 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/USQX92105591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf2d36e6c6e03e2e8e76039ed43f9c33169717337857bf108586d39f5b77ed4. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/USQX92105596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa45cc22790ae95c1fa5543b704c0d9afcdae9bf5fc619f326263657a2fb8a069. 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/USQX92105653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a5fd52c850bc8215911f76250d279418e2053d73ff38cb11b0fb78e1c70ee8. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USQX92105654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4537272f8fb4414e8cb0a6eada004f5b67ff9da13200fa8591a4ebc2efe7f005. 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/USLD91732857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfd29ecf7a6bcda7580737339f0cbf267caa757058bd56397c8d1fe27104cf0. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/QZHN72221819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e14972a6d147f6a18aa6d239bf8345c0672e1fa5abdbcc5ad5d4e679f84a153. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZHNA2291105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9f91bda6753f358f2bacc1c844e3b5f54d0b371f98bb5001433e70cf401681. 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/QZTB92219407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb331fd056f0488cd50d98e99b55cc58a5fcab6e97a9b9649dfa89d23ddc798. 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/QZTB92219408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ceb22a8cb485724ac2669d67400d661c9a1228af87aaeeeb1c2b2f39ea585b. 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/QZTB92219410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f5a00fe909d813dffdcd3fdfb0f341862fd0bd0b83036e05d1c71b0f2e0601. 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/QZTB92219411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c9e4578d4d74f3bf4d80b8f8db1ffdb7c6c2fa1dec28244d15061a3a9c3425. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZES72359590.