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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b09f5fb7a34676250147b01927acc0fe740893c341fc8b93124227eb2e6e674. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30d6aaba-700e-481a-8cd5-aa2626deded6.json and https://artists.proofprofile.net/proofs/artist/30d6aaba-700e-481a-8cd5-aa2626deded6.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb450f6bce80574c87e093dbe2c39b834fc2ef7fc85b99d743c669ab3f602b75f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFYW2168600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0837f7ecd1da8d7a215e3a0ed8dc4e76a66053d89d90d7dbce63812b91e7c4e2. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:54:55Z), 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/QZFYW2168601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe5d7ff9eaa93973767f61f5084ef0272783ad44181f719d745db83b9b89b1c. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZFYW2168602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce13f40a10bfd659323c7ed787605dce39d2422ee9c2c22244ea93171347b4b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZFYW2168604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc14ec67b25b7210109cb709eccc0db85946b7d0d706871ec3c9a422f0255bf. 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/QZMEP2326183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef7bc1652e22994a4f89f0122c2d8cbbbf85e5c52f343e51d62ed95793a59b7. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:40:50Z), 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/QZHNA2140352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d03aa5e14aed1dc14ec5ed1616f13fbd344055c290685891506a645751a54e. 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/QZHNA2140353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c772b2da7f2adee4dea595be454ecc8c0c17859b3cad649a9b7d2e8ac509926. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QZHNA2140356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3331d7a6d66683489b5f526eb9a2e534bcfa6f74f1ea0ea5b5d80f4ac0dc026c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHNA2140357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f1a7d5c9fdc81c2068b1681ffda25fed9a857e88bd9ab6672924b30372fa93. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZHN72206122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300028ee044a98296833e8c893fefbdb0955c40878b9347304cedc3be3fa71a1. 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/QZNWZ2268302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e990557cafb7881792731d9c460742bba68a5a2be076d76f707c969cc43c2d. 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/QZFZ72120125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b10d32c277ef09723dd35dd977836c5c63e587833db34d969e999ea83ac2849. 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/QZNWZ2268305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6275ec1b5bd111a4688935fe95e12fb58f16618ba086222b34f1db31844e853. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/QZNWZ2268306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c7d00ebe7af3194039bfaa480ccdaf619b0bb156e029188b0e73d84a7a2453. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWZ2268307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcaf82e66d2418656dab338b332a19682d950426b073088b0bbfbc0510cbe807. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWZ2268309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874aa61371c6eb8dd5f7ef136ad90c905462873db7a8d8106f389b487c7c7697. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWZ2268314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098349070828af61420f31130a21273c7bdc2b2b44edf8d4e6aa1ee6021b731c. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZNWZ2268300.
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 0x5251bf4a106de8f216e4685d4a7563b0463497ce9edae9f6f2c15f29ff5ec531. 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/QZNWZ2268301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b90f5da29796e82883af6d5258fb19a22ba1d8ede467784dd40275c9291774. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZNWZ2268303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00188693a7d15e3be934ea099f1c7f8bc21da4f7aed1fbf9babd91db988260b. 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/QZNWZ2268304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfb1f86a796927351555c440d69b99fc589fee182de26c1474826e2afd230ed. 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/QZNWZ2268308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161282b4b643c9e8f48a43cf306fde1485dff1acfc65840aaed7796cc2d9bf1f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNWZ2268310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd501bcd69da2bd8cb1bb20b0018c689ed82e09b87ae2ebce0cef2e8ea617c876. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZNWZ2268311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe57fa6b76266b7a84b771db2eeb0226642e90f847b3c745b09dffc70bd4dff. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZNWZ2268312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb803c73ceade2f4918026341f88e83c0f6ea55edaa9276c6f80b2061087dd336. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZNWZ2268313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1081b215781f0ccefc9be8d0756a9a35d0a2c925f8277b6b7523ee65baf05272. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:09:45Z), 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/QZFZ62337798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe22f8240f010d5431448381a7dbc2a58ad149aea8de062c490a4acec3e9d1e6. 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/QZHN32314109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f4588c89f15bb92f03d2dfd066798150e19b285bab07cceb62cd058844cdd9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN92325175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c89ffc250a81503abf67761913578609c4b77dc059418f63a1d6f7fb4708211. 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/QZMER2372913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a1e79abeae9ecc9210aa3953877a3e5ad56750ac9654e3c3ea889468080c6f. 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/QZTAT2383820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad082e020b928fe5b709f2bbf9be500ae822fde60d826560633b837ad1435639. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA72435209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2c167e2dcb176830baf6abc5d0db1d08ed7479faf3b5c1f537d75b95814534. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZNJV2429249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d2a5acb6e9fc4208e3c58566c3513a19e8f3bd07b9e1702ddb2b31fc6c776d. 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/QZNJV2455073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97ac05df50e7dcfc3db193b3445bd46277e8c0e49b660bd9121d0f46cca9746. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNJV2455074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfc353842942c2bc05ebdcaca79774000885d1c60c7b1ecd19e89ce5b83a684. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZW9L2490167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87f83e21fb80d10d5002095612cb46f495af49206368eb855256925b857f718. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/US7VG2596770.