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 0xf670a392f190399b88f2a5ae6d764b0417415754972ff74e6e5d6e3f2200165d. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/711b13c5-ace9-4eea-8172-2b77e558c654.json and https://artists.proofprofile.net/proofs/artist/711b13c5-ace9-4eea-8172-2b77e558c654.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 0x12facf8302777a05a488205f3fa001bbf7565f36631c49bbb2de612f5d345668. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:55:55Z), 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/QZDFP2048128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a0b2a57e05f9d8830548fd584775dcc98067ebf1a064f0e06b3ed84f37e89b. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZDFP2057057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605af9f40bc171fa7ff8c3e35d863c88a2f5e9048fa9de23c0445745a1696820. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:33:09Z), 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/QZDFP2056974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f06351ba5ce10b048f4fe3c4cf8804b57beee06c3e8b6aecac1eaf20477ffd. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QZDFP2057056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314198a7ac7084939b654ae685f71e682af87ca7196fff0c906ce9048d982a6d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZDFP2071721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d09822e4bbee9ec4dda88740c50da2f81afdb4f838e4ab74fa62535158ebc2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDFP2071965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462b06b044a15b297ab1beceb4bcb2e58aa4f385333866509b5e74056d4ab6cc. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZDFP2116817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c029fb61526e7ec80011ead5c41ff30ff42eb2878eebe6e8ec811119b7a7c5c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDFP2158621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ec6ad60ee1b0c4cd24703100268f33b85d2fb6ae955686d2c00a72a74c33d0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZTPX2569043.