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 0x886c964c142dc99b40211ca711ca177e2e8f772aed8a672648bf1df9106e7a88. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4df7dd30-cef4-4912-8281-066e428d4d12.json and https://artists.proofprofile.net/proofs/artist/4df7dd30-cef4-4912-8281-066e428d4d12.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 0xb96f822db7d14c4dea28bff49278c961bd7fa5d54818e1d99985ce37bb11a2fa. 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/QZTRX2336435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb021043ca4c23d19ae3c8b3c4db3a4e01a10af543e9d9507e502c36417397b6. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTRX2336436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda36ff66b9291d91aab1bf9508b7388679afde9005918d511d3aa25d8483f391. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:05:14Z), 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/QZTRX2336441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a3c2364728776b3e3cdb7a49d8e8442913e927bac0a7c0d985d9f4133e6953. 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/QZTRX2336443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e08dd3c5ef6bbb51362920b4d350ab0e15de557659f59a1c8cbfb75d1d3089. 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/QZTRX2336444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa850663acbc329f1e7f337364ba9af597277d8cd400c62f806adfdcfda9f184. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:36:20Z), 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/QZTRX2336445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7279a1ab8cf5f479f5f148400033ee155672b88c789d14eae3deebc73f5572. 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/QZTRX2336448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086eefd10472c0f77c6922baa9854fbe6cb8107a9d4f6fff6accfe376fbadfb5. 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/QZTRX2336449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5f53fc47f7cc56cd92589f8dc83566c2c59c30488c52cc28211e8b03fdfb15. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTRX2336451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91706723b6f0627e3d0c8c2cac1a34cb6e78d82cd8d3e699b5dcd698c68b54f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GX3HH2494257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773c2c4ed32f617e94f42d16042f1762fa24249c9ae17478e2060446646350b3. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GX3HH2480951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3c252402508fdae51fc4b0e3fde87f06f2efd2f623494380f7658e7384b1bd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GX3HH2463275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d61234093db1daee062774d930d61e8d8703d7ba8614c4767a291cb9a99436. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:56:46Z), 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/GX3HH2414994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50769f41155ca03da9fd2d25bf9bf7ca52edd20b154627786ad575bb0867df5. 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/USLZJ2516045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3917ea33a2b71495f1c4d8f7c4d6b3201227f03536e3f8d6aabf85a7ae4b7e1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:35:26Z), 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/USLZJ2516072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9767d2de14dc317ee056b760a37818274bdd3bf49f1daea8325440dd38f31564. 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/QZTRX2504248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a012957372227f8b774a21c2533ba5c3059b694ec3df65783bf2565dc8d2d08. 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/QZTRX2504249.