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 0x7fc406ca6d5d0f6837f49730a2e61287968df255547ba54d86bb785bac015acf. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e306bcb4-c27f-4744-880e-4fa1de088453.json and https://artists.proofprofile.net/proofs/artist/e306bcb4-c27f-4744-880e-4fa1de088453.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 0x793f585e8e9355695e9c9d9f5e14935a9f7413d66a28036c85c7c58b4a944d0c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTPX2364049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0037fe2d58a631919445245dde93804f06ba0d27950d92296b1ef4cbd203a27. 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/QZTPX2364051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eff0715aeecc4d952d29b44d547a382fa77402f9128f9e311c9ddfaf6b168c1. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZTPX2362278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d53284d36f2781888e4a02ef6c69781ee0ee329290e8e28959a5850cbfc8d6. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZHZ42211208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1ad42ce1c95a057fd887ce50d166ef18476019c0e5cef36550aa8016342100. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZHZ42211215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f0629aec889ddc32fe528a2ca8eac8fe5af696fdb14e1d889f10b6f3c6e585. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZNJZ2218063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18dd909ab581d7a39563d3037ebbf708c2d99088769a6937c5e2273814d17fc8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US7VG2311644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a67b8da570e68247009da59786258f84e43f2d7b6aab339c31300daa6aa5ad6. 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/US7VG2311645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b565506e3ea161a336dd9f9944c65703ad89d87e2057442ea172639eea1659. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US7VG2311649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ec03ca3286071c29803974794bc7e7dcbecd964fffdcdb6d7be331ca9a8c5b. 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/US7VG2311646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa53a37493983b4ebbcb6d75dd1116c90373abf26b2e1f9834cb15ab60f9bbfd0. 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/US7VG2311647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f76a55712e5ba3cae1817b309e15e54a6facea69d06ab157e4da4d92c2028d. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/US7VG2311648.