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 0x6b2ed7bc8532e45599388bbb90ef98cb702741f0539405e36534c4bdb5b0002f. 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/edf3a04b-aa49-43e4-a7f7-eb54d2a8b718.json and https://artists.proofprofile.net/proofs/artist/edf3a04b-aa49-43e4-a7f7-eb54d2a8b718.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 0xe663b6e3e426d62e5a3d75787858eb6d54ec8d762aad4e26838f925f1abd2792. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:08:46Z), 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/DGA082261819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe770ec7b8ac108d95a12f8376bc1c86a88ebcda823dc462e3f11d475a3aaa60f. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:27:39Z), 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/DGA082279840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1434b670576a7dd27f8102dc5e2a0deed80a08991220920061a8e35a6beff0. 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/FRX202334115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe821f792c4a17e7848623229e2e3eb714533ab625dbda8a000d26ece0ea54bff. 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/QZLQR2154219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b470775a7e33f49264e9050b821eedfa71f9a7cb22d4464996bdd63feea5725. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/ESA012513685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8c59353b27cd655c10f35611aa46308603aa76d551551022eccba2da2b129d. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/ESA012532232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4099d7eae5fa54269cb0ffb01208c6a15c388ca3f5829b74239fde2b74b3c8. 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/ESA012551415.