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 0x1653a1ca0bd784853c8caa450cedc71f2e3c24a9371bdefcea999beaaf0580bf. 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/6f9db777-9f63-4559-ab26-5d9ffa4b07df.json and https://artists.proofprofile.net/proofs/artist/6f9db777-9f63-4559-ab26-5d9ffa4b07df.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 0xfe377ac65c9b747e5ed72a4b8db6b9cb19178829475622fa7dbfa95574aad97b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USHM81668661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6693dc42a3ac0a04d710920c52be49e2fce5f8a445ac809350eb887a587b0b3c. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/USHM81668662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273a861d7860376836f3a582a9256cb826f0144b7f33d80e1d33e2c2b1cfa926. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:40:51Z), 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/USHM81668666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29923c21b1093b494179e4b0b5121d04fc00c3f91cd11797b597e81e2bdd806c. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:12:12Z), 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/USCGH2268952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3411360d493d0bef36e3b4693b6c9488d511cd4e582074f4277e0d552436178e. 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/USCGJ2387824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2e0b49f4db9780a191ca7beba40dd247f8b38066477809a41623ecc2dc2077. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:48:47Z), 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/USCGJ2387825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7ac5fbc533d038ad5a6de3d494bbeec681d3f97e3501157c184cf32bcfcc00. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:39:16Z), 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/USCGJ2387833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd73dfe5d8457e059e086e591f940aff2eef085d4ea55b88d762cbf16fad72a8. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/USCGJ2391931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c22fb786a0d5516442bfb893a3982b12ca15b7f7012ad274432129f71a9882. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/USCGJ2391936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301518606b5b5dabbb8b22fb799ac449541e8b99d11d0c2234ca082a0b2f247f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:12:57Z), 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/USCGJ2391945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f77d755f7bfae88cb2139a7147bc1390de76a2a2855736b2e18e1125069082. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:50:55Z), 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/USCGJ2391946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75118c8bed9e570b2b58dcc227090029ab83766bad6ea1f66874401a7ab324ff. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/USCGJ2391949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d5b48a1a73ac91699502059ba4649c72ef662246db98b86da68f0e52d91530. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USCGJ2392017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01c44d56820214ebd178a0bc0022f41a788144d68a83fa35e8f02531567df8e. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:51:15Z), 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/USCGJ2392032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d0f7164505523dedf1dfe58cba28fcae44e2eeeb878012810f202e06d7fa67. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/USL4R2452431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a13239be56e9552211b305362312b7b48dbfe478b3aeb8666a698684331b65d. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USL4R2452434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bc3aa21b03a55a589ade3768bf2719d1249198269bbe02e7c61cf947ed7c58. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZW9K2411047.