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 0xc17cda9d27950ac7aa2715c91ba650341dc3fadd5ded48ab4b2f33462950eb11. 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/46bab64c-eca8-492d-acd6-f00c9bdcc36e.json and https://artists.proofprofile.net/proofs/artist/46bab64c-eca8-492d-acd6-f00c9bdcc36e.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 0xdbfe0cade7e1727f1a9c54e3b19d3e170004edf004f55ac7705311a31ebaa8da. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZNWX2227712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab5ece14315a4f0136ef1816481466845b4f673c4579fe57133bd2b3154f68e. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZNWY2209472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03eb0d5ad450c991c4a720dde5c156445a034221ccc1fe3ed4563779ccfd76c1. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZFZ42350891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1aec0b90cf9920dc7e87ff18598acff939d90f66163ce23d5b8ff27ad370548. 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/QZES92357750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b246daafc6f13c5edf90931de76803b0aadf8336d2f41a0393d6da465a1c377. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZHN32373863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6417fc5f8276097b1497c51bda21a63689438a3aaf2d6ae8b049aa636be7784b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZQAY2388244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7fb8463eba987e65090609c0712b3a7ff47d9d8a00bc70ae421ff5c756c752. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZS7J2337321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67dd1adc473cad8befa4cafbcbc3e4672bcc0db1b8795bf8e431d5043319812. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZS7J2330807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01765c4db9a1077ebb9c07db2ace2ecf70e4fc452ed0cb9a11193371d89ccac7. 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/QZS7J2372512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09259917748cc794029a6110b20469503a8542ebc75ba86154d00a3f76e02107. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QZS7J2329635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642c974809a9fa62612caff4f8fe3c33343326db81dffb2c7821d49360e7de0a. 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/QZS7J2344139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50078a74fd251295a69edd13b927e0512c512a6b76a0b1a613f2f3eee4a29b2a. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZMEN2301735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab010dff2ff863c2f0957518c1ada4d5dc54e18e453eca8c5d5ac289c7f567a4. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZQAY2367336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c29fc8014f662b38535c1a79f1e58a36b5ae8984b13228afa845465ff579c97. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/CA5KR2375595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9102656ea5afa711386da8a2e7c03df6f062ccdf1e162a200fce58782779cd. 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/CA5KR2382859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81aea6be4fe77fe8d73a46afbf39d9554de61ccc1e037cc7409d2539122b1549. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTB72307646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd6ceea736de6663eb0e95efa37218d9cef0813e83271f2c06d1c054de7d6c1. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/QZDA82419327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49462d3a2e45586f5bb7cf7d5e4306966eec941da747b86439e5bd638f9063f5. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZK6G2473948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc6f33ce87546f35a784c928a0b2851db196a553ac54b115caa4621f4c3d2a8. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZK6G2432582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bac76379a7e6cd53c4474a018b5eedf989ee5ff74290830a0aa8c4da0f9169. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZK6G2432584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352ba90cbd53b78dc3e2af3138ae2fc0144d3792b9d05c0525127db0e809960e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZK6G2432585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b89dd1166876335876f66e6f98f7924ae618b254e4a14157536a1a7a2320c2. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZK6G2432586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb045e4fd5a494fda7255b552f93389ff2a7f11772d311f726248a2b2fa2a27ec. 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/QZK6G2432588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6caaded8945268137ca243311bb68aa31847e2a74238588bc195c99743eab87. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZK6G2432595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec1b367e9abf6cb4811d0e4b5e4f4e3452bdb6c842b1a49bb2e639837224702. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZTBC2404611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfa681a879ec31c2c312ad4c6771067e3e62f706c3db02575f12899ad0c6dac. 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/QZZ7N2463500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c2be0c82e4bb6947111ce9fbc72311e9947683814177ad0b12aae51702f8ef. 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/QMFME2476355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1479dddeaa6f5c30816afad1eacb324186355dba73481e462278986e163f1d. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZFZ22597098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4f1b4f9be4aa7d53e7d3b1e15eb7e84ba97053222916004948a855e40fcf78. 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/QZDA82590597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefacb0f71c1af8c27d4e0e7cd399d351da48002875243650687dbfbdbbb1780e. 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/QZTB92591899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90cc6f325f52851f12f30ccd6a7d85bfcf16106f4040cbe2447be219380ca8f. 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/QZHN92407944.