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 0x6f0e8950953bb6ad6e4a6c38b2f094cfdd9b058956a0155c224344263fc6a3b9. 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/622c3aef-b946-451a-9d4a-c8816696ffca.json and https://artists.proofprofile.net/proofs/artist/622c3aef-b946-451a-9d4a-c8816696ffca.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 0x6ba0159c397f6ddfb7df162a4000f057359d6ef3003878d17ec1fa8b1e39b0b5. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:59:02Z), 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/FR59R2196885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4317e874a82bb909b2c16df365decf86cd0fc9ec92b0fc38381735b89612f5b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR96X2201869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60846bd67b3e72f59af53a3166e136c4f5bc795b9e44673c10e964a02b9931cc. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:18:15Z), 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/FRX282373151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ecebf81097092d1e874840edf731b7d7542d5fe30f23469ec07cc947f4d778. 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/FRX282372626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7353fd9b8226a129cc84a76e818e50f31243598fd23afc9f5ec2dbd537b0f641. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:06:54Z), 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/DGA072340428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacde89e5b52937063b3a21aeb5dc4c18534fd8077eedfc8d97b45cb2d31a8e86. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DGA062403483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcf9e849374106a851e2227fc2b853c0070e5d750d81243924011fc1b526f09. 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/FR2X42509990.