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 0x9fea92c9f684bbb9fc68679f0d44d509b5aeea043208123108280f677fc9a52c. 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/7f1c4cc7-320c-425b-bed3-9294d74fd7a8.json and https://artists.proofprofile.net/proofs/artist/7f1c4cc7-320c-425b-bed3-9294d74fd7a8.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 0x2fb5da4059961f3db63a3550a21d322910967409a6ce7c3150a922b9031b38b1. 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/QZTAW2366890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d773de9d3eab6c0144095d4673c08ed69531ebc0fe7a65a2ae65f2b1bf2efbf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTAW2366891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf20cead03c1b01819fa302bd80127fa6d81555db642df5f5bd20b1be52a5692. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTAW2366892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145e7ed766d7fdfa16e9ac3c96654bee0a933993c21045aa74d2126341337c26. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTAW2366893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebe5bcbdcb2a1056e0dc258db13c67ea3c82027ec12820fca3b179ff62fb76d. 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/QZTAW2366894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f69cc3e8f3e3a2d59e873ab41a707b16c7db222fb0e14a23caf163e24733c1e. 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/QZTAW2366895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2c5cb5d066cb2ea434079c5d3811fb9d4149f7f308548acb3641b2e4c4c593. 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/QZTAW2366896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53cd0830337c5a972dff83206c07d9273bd4160347a9b2bfe4d433d8144638b. 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/QZMEP2471477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ec33de883949dfeefcf5611da76b3423abec77c40f1d9a2c603523d8d6c5d6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEP2471478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c403070b2c342d82f66b27f459d5b7b778b3560e5210876e9c8e655110c71f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN32496269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2736642521a4bfd1bb6b71931a604c851a7834c78e0b2c0932981a523b2c6e80. 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/QZNWW2307969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf89bc9510a2657b2bc0ecea57230affbeeb872dcbb4e4c5f104bac21f60c324. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWW2307970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91e47f0704911ba630e8e8185200503ad12d1620ee1f094e2edde72e5b6e73c. 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/QZNWW2307971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b09d635352ba4e447556e031f3c35d73a9a013b20cf4c6a4b413de88cc20a7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWW2307972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150b9c907420efb0d2f7ff57c463dbfde1adf08564835df87480aecd98bad0f3. 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/QZK6L2353948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0ec4b021b73f5b752b846903078c9db0fda660bd7f8d318ee76b1f200bbea8. 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/QZK6L2353949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dac5fde4070b804ba6dabfe3e7409f5d6923f679582c365a8ef8614c731651a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZK6L2353950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862adbc82bddc15f43a9912eb9502b2a0dfc2428dbea9d974010fc18ea1a12e4. 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/QZK6L2353951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0668d5b62b0339080044ed7a5b35d10f590e0f9eb01b6641a1388313af2b680. 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/QZK6L2353952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc051c7537f00a8e92add8bcd2cb0e5247616f5e5f3fc98f15ffc81e1c7fd67f6. 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/QZHN52305372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33587776cebccaf7e6f8c07aac4f05465d00e5bf08a091483704fa8e5d7eaa96. 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/QZDA52388548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd8d6c6c90ddab73df3633c362a969aa0a7a6db9543f4c7bd706cd48ec02bf2. 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/QZHN72324013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b53c0c7b223b9328f17cd43e8867248723baebcfca8b0d0dce25057ed5396f. 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/QZHN72324011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ec9864b6101be9490f78b73fca6bb47b4ceae30fb4eaecb567d66ba9fa13a4. 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/QZHN62335685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ea940d3110ef00e90aecc7d54dbce76eab310780bc80bbfb1ad9ff1fed601b. 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/QZHN52362217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2da507163de98f6f3ae11f24f3a1f6b6044ad830b3470843873f08ffcd2887. 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/QZHN52364633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262ec5f667c1b98c720e9d0506c24e4404e5b3703e06f193ee404edf584415f5. 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/QZFYZ2352803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f855ac7c75364d3f39f2d43d49cac5a7c2a07eb1e33e88b830869748a6fe28. 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/QZTB92253887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce9a9cff208907567d572d0b4f84394eff68ec0c961602e5d99581c7ac4d579. 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/QZTAX2294123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e00ee8c629505b2b6aca33d4e4d48068ec97286eaf6801b3973a770a8fbdbd3. 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/QZTAT2288695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6662bf7cbd27c0f5c6972f59e7131cbd8437993307e346fb58d3f0a4d5bbfa2f. 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/QZNWY2266557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2d4602d1dacc990c86345b45d972362fb6df8d17adcb261c8b0fbfd2b6ab27. 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/QZMEP2292365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d60157261d9bda7b25095e2fc2930693c43e3158f3a7cbb930ab3003e36b45. 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/QZMEP2226843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a33de429056002009ba23d27f9a9e40d57bab86fc1ec1a3bf6ab9db7949abd. 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/QZK6G2275919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe196ebce807882449029c7654777923fd12421954e0789cbf9618f2ce7d51ef9. 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/QZK6M2234745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a14368bef0ed1128195ee083d6a3211082e6b835cb96be91896436e7b53e83. 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/QZHN82279934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2370b4d49a17de260078398c40259178f467c6a78af256e4fbc42a3a7c2985d2. 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/QZHN52266809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2462697d312ddd7e23d66561d5d41d65572678f113d29e5bf617be7cb42b478. 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/QZHN42216450.