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 0x8322aa34edbb5137acce183ea2dc4c15b1d3d2d79091a63008ca73e3dcc02e73. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc7beb32-edac-41f8-b38b-6f26ea749864.json and https://artists.proofprofile.net/proofs/artist/fc7beb32-edac-41f8-b38b-6f26ea749864.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 0xc64ee5e8c0092306779c374270d8f58d2076f81802195bdb507789be601dd3d8. 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/GBSMU6721545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf888e577a31be5dd96d7b5bf2e5daf35a2aef165573d56b54365d81d19bb2df. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBSMU6721546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aca98ce000408426543eafcf0cd324ffb209c86e386bbb08ba0c248c4a4818a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBSMU6721548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6601a72ac31b314877c816b8e6145a89071367c2e4d8441b77c74c0d8b29da. 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/GBSMU6721549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762faa316b53478f12929d34f7afb3bd5f8195c678be33ee87e81531c7bb6847. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBSMU6721540.
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 0xae5c275c175368e08e635bd123bda94d52dede4ac27a925281db0ef0b1a9a031. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBSMU6721541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13baa36244b069e45caeb4c797dfbfb491fb5e01c60baac7802967dbfdc69131. 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/GBSMU6721542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675dabb565d3c710fb4f023303d36500fbcb1a5ca8e84b4d58fa112e51f90f15. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBSMU6721543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdd9f6535e82327f090bc2670a54043891964a35f86ace9525bb23522fd320c. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/GBSMU6721544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acbe553095c503f5c6a59df64b3976bb3da4e3b477f6eed0eac0f32cbeaa930. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBSMU6721547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d84bed0ac8b4d3d299b5ccfcc453b14f889bf77ddb0cba89583f151e0b664d. 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/GBSMU4179283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133e8a19080d5ba39a210c141f3c5f1040301bc876369d3f98c6fe4f7decc4e3. 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/GBSMU4179284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646202641e4d9378205fe9299e4d43303380b68c7023a6090de5e952c81de506. 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/GBSMU4179306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe5e767ce2d95aecb3ad8e7054b040f3ec70a2517f0109b034d6713861e90d0. 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/GBSMU4179307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b7ff201d349654994ab0195b7ccb6b31955660849ddfd90881f737625380a7. 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/GBSMU4179308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af1cc7facf5089b117b11bc5c73f90156372f6a0dfd0b7efb729aae2b504d11. 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/GBSMU4179315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b21f4c5bae9c6845bc608b670a96144af312fc7f99b584cb2afb2ec51c6be8. 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/GBSMU4179316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbc9d2b1d1f2ae6bea3861942ae55061ebd276e4b199afec6bb5f8974f34e21. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBSMU4179317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052823507cfd92f5e439eef4bcbd45c34d0acfbafdc0b42a4e8a1e2b0ec8ff3a. 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/GBSMU4179322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4048cdb4e9c9eb65717df010c72c68a802420639d89e34f24411004464a705. 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/GBSMU4179323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac4b32ac1b9c5a0b2c4021b859b9b4f1298001828b00209faebf61bcb8d510a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBSMU4179324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90227a05b5f4adf2f419452c17229b2b29041d7faa533310e5e390a3e157f11. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:45:48Z), 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/GBSMU4179333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ae679ce6de2d6d9a7432960872e814c278a26c079bf0c8715795c19b8f1004. 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/GBSMU4179334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e56240bdf14e300d0d6e0006acda9e2ede23611028126c207a16c82ac068520. 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/GBSMU4179335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a60f6bc947539e2956b44884e88ba140bede72e6a835e03e04a83d8acbdae0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBSMU6973634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fa8c6b78905ff14389dd91ff2e1aca86da83b22b2c6468d900fa74cf51e2e2. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBSMU6973630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb766f61c04d8c0038c055077e90b8de373362ac6d125913a50b4631c6f822ba3. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBSMU6973632.