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 0xc467a8b596bd2aeb754ea6f0e261c4d49326896ad35ef95530dd55710d07dbec. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7fd3b07-28ec-4062-9081-ffcd9375fcf7.json and https://artists.proofprofile.net/proofs/artist/f7fd3b07-28ec-4062-9081-ffcd9375fcf7.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 0xd7b58b22b927fd857f4b6c8d788be299890285b8cd1b200d6d33ac655f770b8d. 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/QZTAZ2434785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db0d0f950b24ed9095eb0128c5ef57d603b8a57cf5fd0d315dd898df8fa1b74. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAZ2434786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f435d9215e0ae1f8cf915a1876569c98b2bc581f688503f060c9cbace9f24e. 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/QZTAZ2434788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe306777d4d09900f8498d72df51cd1f3e2e8e0e9265eb08afa96c3d06d810206. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZTAZ2434789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75da3fdd41ec1fe3b1c736272605f075ffe3bcf458d96cda08a8ecd9b0bc763. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZTAZ2434790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58920ee64717f388ec11c37080af2d6b229dca4c972f90a1d3d1b9c5ea6ca95f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTAZ2434792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadeab9d8200ac3529f25d57a0174b5cfbf769798ba7dd5fb26a3f37bd0ef6242. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZTAZ2434793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed948d24aea4efde7bbc038754bad66a8c4912add7393403458c2d1ce0bbea81. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN52521413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76a51b22eec971a45b02d311cbe3163721574fa529fe4f9105cd787761e3596. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN52521414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc48661119620cad65968c7f044399db95fe6b797c6946e342ee5333a7027d54. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZHN52521415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663febd8aa42241106694dfc0511e834fc38a86f94e77b3bb5e9c12057a197f2. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZHN52521417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8eeefe799ba5c40febcf859233cdd86a60a61cdc0d482ab6df0707571d1167. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZHN52521418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a5024692d78c9ca8fcbbd8ddfd48d6b5d027c720fb202d4a53b8f7eceaeda3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN52521419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2c24cd081c7e610d2605eaca4e459334892e6fc7ed5b18b100097111b6b8d4. 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/QZHN52521420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b97a1da19588ee273b252fb2c85e779d4d8fc8312a7a0f7a75dbd2427f9bd5c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6N2532143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ade16bc3a3bdaf685b51916543659122f57ce28a9adb7eae022994c8f80a4e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6N2532144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1dd1a05b049bb000f9ca0fdeefe43956e3c71c5e8fb91e8cc77a3b095bf385. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6N2532147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4abbbaf43c648c7a76c2abb370866aae9502d8b029be215218cbd9f113f027. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZK6N2532148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d75e073c9af9fa8ddfa20f34bb6d7fb29ce022d3e2712029c76c13fd69a0288. 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/QZK6N2532149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93358f48d431cd24f7807ebd8c551da2f5ae56deeed417fd62a0f11619f88f5. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZK6N2532150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fffcfcc54309cfef1afb01d3c3eabc046608a4f465911332981200a4343840. 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/QZK6N2532151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfd83743b8e0f5db6b0df589ce40e307053817a398adca45901455a9ce5e8e3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6N2532152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698ae0758a939320d14a10b7e9557a3d54d0ed077b8a338e8e808f84cd2d9b83. 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/QZMEM2577155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4360063ec44051a74c7a737fe76640560171d6e42caaec7a0937996e00744a93. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:31:48Z), 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/QZMEM2577156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4eb48787f9ff177f8889f9321321132ca1ed09be7096978c25ee7467550b24b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMEM2577157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b1369ffc9376e3addf896c84d6f33079d74eb0d858cc3a46ffd8b07e452093. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZMEM2577158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4031e8a6839df600bb680ef15db89d034ba23f5af03bd562b6fc78abedd6c0f. 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/QZMEM2577159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b31e36fd1b232c4d055f5b51e49ebf7867cae2f639bb877a5bf552b139a19d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:00:04Z), 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/QZMEM2577160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5242427c4ccacf3f94bcc7b02128b8d6f145154ddb3387e419ace5c27f393357. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:09:04Z), 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/QZMEM2577161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb28172005dd45a652f1c5c4b2397228b906e233c79550022caad406bb05f61. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:05:26Z), 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/QZMEM2577162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3990f34cadc7bc9c696a8263439eb4f0d97a03132e724364e8b57f06aaedacc. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:38:47Z), 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/QZMEM2577163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8bf97a1ba43deadd18ea2d3c9a47909c14279d0ab6e585bed2dc681f0b6676. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZMEM2577164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c3c7faad0389b8a1cf3467c272dceed37a3d4ed4fd6cb5d070824512abef48. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZMEM2577165.