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 0x70b287cc92197064a53e9242217b9ab82ba907e8f197d92ade4b8634685bb4da. 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/fa65690c-726f-4694-8596-74c78ca328d7.json and https://artists.proofprofile.net/proofs/artist/fa65690c-726f-4694-8596-74c78ca328d7.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 0x577bb5fc2c26add7d558e349f7bcd449fda5c0d1e8d9eb8dc768731c570b83da. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZWFQ2335379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde90f6dedb4ac171405c9ac73c2f74e054b21850c148bb679cb1adc9c6bd04dd. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZFYX2531967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2153ded5a258835bc797fbf64d410f439dea6a1612eeb8c4842844b166fcba7d. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:38:57Z), 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/QT3F22412812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dd2d9b5eeecb5800eb36805ff99a34b99545b512a923739ecce87956fe3cd8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFYX2546420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2f2f47150aa9f79b6e6510a32a36f8498f96e1ea43e6cd19b6e4e825e61280. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:20:39Z), 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/QT3F22412813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bfe6d103d1da8fa9542905c40e4de864865ca65e22b4ee29becff5d465bd17. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-22T00:33:00Z), 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/QZFYX2546421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52aa2c023a46d78d9d04679cd0377a2a2e67deeea6df4ad3bee15f7f52d4d810. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:09:45Z), 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/QZFYX2546424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5028cf8c6d269f1852562125a1fffc44b1e58d17bc366f22266f44d32126ede4. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:50:45Z), 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/QZHN82562611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d530033d880bbca4c239c87c5cdc84b583d64e655aabb3349bc516a847bb54. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN82562613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ef7fa02465f69aa4b3977a41ff101002d4fc6fd5050b574e0aa2f846528a61. 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/QZHN82562614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26360705ca47f2578cb280cc846f6ba51cb0194111751eebd8951bd12ea22712. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:56:37Z), 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/QZHN82562616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf7b7436bbb8c552cd3f372363a513c6f195d21129bc5b018a41507e4f69e96. 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/QZK6Q2599282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa381409e9509d3f9fdadc588acea93a7a5c57c0aa97eca51b87cca31afdfc8. 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/QZTAY2534824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98afd7379de684bea662734271328d8de14c4e5bac5197c08e3b3a9759074e3a. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZTAY2534825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae48bff4fc57569f99fddbe111233bb549a7ee89017d25478b58ee2cbe549f6. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:10:29Z), 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/QZTAY2534826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb064a9bc14aba2c0441862d5f878ca3473f30f96870290ee530069254a681f3. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTAY2534827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7f9617b846005a39907839f82aa30f00812f2ed46ef072d6c6c0cb80c0b6b7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTAY2534829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0063055f8d7b479044db91fff2b5dbc1ce65f60dc55fefc3350bd565d9740b6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:35:59Z), 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/QZTAY2534830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b2d4aedbf460b62a354669c6bd7aa66a56ce8a4ac21d8b6a7ca5ea5026a40e. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZTAY2534831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0cf9057a8e9ed3f73bfbaba597108faa249b840cedd5ef15d005e3d43565d4. 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/QZWFL2537767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bdcb2fa96a0242e8b6df7fd9038c6a1ac1bc4e985b4e3381a466b030e3e911. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFL2537768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b936bc486bc73306a17f941835bb5f96e258459c421351c2d4f6108b55e92d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZWFL2537769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbacf6a0060292d010137b275e3bac667c4039495cb4d5a14124c407c458e312. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:00:56Z), 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/QZWFL2537770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa468837ec3e5984633a9ad66ba9bb52d7aa18b86267ddd2a5c48c82b1e9b2f. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:22:31Z), 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/QZWFL2537772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12098c0ee77ea5ddecbd25536e9fcc12d21b2ee8460cb8f9d8ff45b20eb4f6e0. 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/QZWFL2537773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21832e4e00b480046400d1bd404f327929bc63d516f32ff1de3285c231cf2543. 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/QZZ792530630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99e4b136de092a618b13f79cf232c719d336732bcab9324d969ae0181aa89da. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ7V2560992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee12b5292578c50371036f05fc31db4158fc4b0cbf1d8fbe41d8054120af9497. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:01:21Z), 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/QT3F92572253.