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 0xecaa48cffbd7d06874215e97d599679cd5ff74e19696d621a14dba689b5e7ada. 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/e767ca89-feb6-42bc-bd04-4bb192af5e50.json and https://artists.proofprofile.net/proofs/artist/e767ca89-feb6-42bc-bd04-4bb192af5e50.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 0xefb862b2f20996d1b0fdaa858cc4d730424a167c004483eb4afdb02cced8e8f3. 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/USGR19200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede8950abeb99a536141e6ec359dc33f7bded82b95cb9fd27ff9c295e9a86ccb. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USGR19200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fe510e92c19a5936fdb880baf903c2aa9a675322d23323f983c06d6f56e652. 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/USGR19200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fabc4d54e601b2a5266ac0aace176aa6006b2b19ea9e2f61f97d672d03389f. 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/USGR19200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624656e97bcf93624945f1872a98495e1d143811f088bf6015f985b60d008c6d. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USGR19200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b665d7d3e2420f0fbe84709c91fadbff51f6fa6eef3684c59026ad3f4787701. 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/USGR19200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774cfa0e3bef49a87bd0012c3883d7d03f4e96504ae4990c3d70ee278b6aa054. 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/USGR19200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2e36dedcfb05a333734de5a7e2a33e241afa2de449cc6193b0c5cf4f7bb014. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USGR19200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63381d92537bf364fa294bb979e6642707b42a1701df61f5afebcfcf7867bdf6. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USGR19200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaddb7cb8c5c0f2b138d615cf07cbfb7ef3e70af678fb37f29c9832248f3c4dc. 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/USGR19200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ffb49c1b84d43e873d5067b0735cf987166dc5d22184d55806e000f7f936ac. 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/USGR19200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74dd8632d46d221e389ac821cf10debf4181e0abbcc87393b24fb6f5d386d5a2. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USGR19200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f26ad56052650c3d008b0b27f9bd604e7a77154e3d3aa2161ab15dd8ebf6537. 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/USGR19200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5731c8a35df563225e0340467fdcf8d646f9e1f81266772b9dfda13fafc304f3. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/USGR19200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4ca956a5e519598c37e5bb405672a8e6052d1ea850354fed9f61c9e7ca3ff4. 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/USGR19200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09677df113a6a5c0c420e1c29c8771c131bf819e70f89787b48bc8d71164621b. 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/USGR19500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d3ccc85d61a37194ba977595f2c84684af55e97c29b5033da210156f0864a2. 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/USGR19500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd795ec9b1d54b3c1a8eadbcba375d7991f5277fc2c23294793f94f1c6b4364. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/USGR19500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a83e299963b9e3ceb7e97dfd385e33d90cbdcf22cf610fb0c651d5e0acf741. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/USGR19500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edbfa5df79c1add7a83f60092476da1f3acdef16a96567681e31780d2bcf6ec. 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/USGR19500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ef6aa3b7df737216df1edd4b088c3be956ef7f1404e80d315ed21876d1629a. 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/USGR19500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b75b6c6103957171e67297c892a979da3139716d6ebc67b575c860ba3f86c71. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/USGR19500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd2f374d666c3098b968f881b2c0f4ed01359eb658e4e967248ff621f25df97. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/USGR19700152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2342f2bd66e15581cd4ed556e6a9fc9e50eb48f8420cca6d55711a609a85b7. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/DED462100126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad9ffe7e89534ed045a9f77c59f4b4a5dcacc8b5899807c68ccf7edb8d0bdea. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/DED462300465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1b1ee22001d1f94bd80b3fc65686a788ed52f72952d8e093f61b1d5e4043e3. 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/DED462300466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909c8178bd3bac1e932c9c5a7c13fb787cbabde7dd5245f745904610ec27ecc9. 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/DED462300467.