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 0xeb1db7f08f4180a1ef04ca45ef6ae15035101e15a3904ce438ffed2509ece042. 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/efd0c3fb-98e9-4e14-b215-08c4acc90876.json and https://artists.proofprofile.net/proofs/artist/efd0c3fb-98e9-4e14-b215-08c4acc90876.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 0x53a9b76d3561bc857998bbb8207dd56edd2601e3a23a8ebd59a705485c76f30d. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZK6Q1901511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123c5a7a79b1446d05d972ae00889c4e26a20276b51fd2e1661c01453848e1ce. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZK6Q1901513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc4c164df7783cdb0b3cf417a2924465b09e9c560249a852496b3176a416a7d. 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/QZK6Q1901519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9319a258b22b19a67a920998de920a6fee331f866e7c59843abfb364b7e85b13. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZK6Q1901520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8830f0da3b42ad7b04834b2d2da7f632832c16e5aa8c18f49348033269a9ee66. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZK6Q1901524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabac8bb09a8e1ce070d568852456d3355bddfb77f50e110b09f161b38576f87. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZK6Q1901527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd2c9874aa7c27a98193b49a2b8f5b79d44fe776fce6334a3ac92b26571a002. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZK6P1965902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb476157cca9c9f813d7efbc35b4da82f9c9da9fc4d8b4dce3d0929a4c8306c65. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6P1965908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4f7435f042895283a8ba177eef4ca02e901465f497efe8492963fc26671aac. 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/QZK6P1965909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25bddd6d770531a6975176611c1062969333428e37c35a2cf6d335c6b12e12d. 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/QZK6P1965916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda756efcac2bbb80a87724084d81385e6201ef7cceb3937045a8b6c5f4ccc822. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:43:17Z), 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/QZTAW2370370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeef10cf1c581bb0716cf7007cc68382b65fcd7643b6f809972ed9ead3255461. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:38:54Z), 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/QZTAW2370374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb6fb20bd386cf315dd4ab25dff41d6e627c2744e9a284b52c07ba0fb1a0ed5. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZTAW2370383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266aa153c3945d248e542c346a1218fd8fb8c2f6d248ebb32c61ce230eddf0ac. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZTAW2352492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc78d7c23798b4839679218ba0a540c24b9941c73a4df2cb11ea9d51f892566. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTAW2352496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e11d7f0ab7170a48338d0b8ea1dfcbabc010988730c56509d1d5d29198431b4. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:40:00Z), 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/QZTAW2352503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ae8f8d14ca39ea832af245f047bde81dd174166e03c2b1f9f027ecbd9e10dd. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTAW2352504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485719f4f7ea3ddd69407f416fea3a8e4dd51a2b502d4ec4ed521c50dd710913. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:47:30Z), 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/QZTAW2352506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133099e80007db283f8d8443636c2892a6e4c44bf25a64cd21674fa015524a6b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:38:16Z), 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/QZTAW2367978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c63b7b407ef87a5e5aec63d72ef690f6dd6577a386f18900c4a545041b84d37. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:56:30Z), 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/QZTAW2367979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d96293fe75f3fb2f02068351583c64492d561f236a8039bc2c103c448eea87e. 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/QZTAW2367983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304d23105e6f3d4e862858d6e16a089582ea829aa369a2e5e85bc1a9239d9f5e. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZTAW2367984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041f9bd190860eb645d6ec449109ef5fb807a53742232447f7308d9a2ffdd99f. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZWDW2442521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf13ee3804b01cbf982f570fda20171e98c26cdb05b6ceea55139c3154381e2f. 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/QZWDW2442524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d895326e2e6a5eb17ee62da795b89f56bc4c9bc5faceb984d82cbd00ce2cd56. 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/QZWDW2442527.