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 0xdb62daa3455ea7d0e1de0134ad268b84f8aecfb94a15f260197072750c8f09e5. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10962467-a16a-4321-835f-67d5a9371d73.json and https://artists.proofprofile.net/proofs/artist/10962467-a16a-4321-835f-67d5a9371d73.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 0x50a1f54733b663a5b0116685cf07b6fc6598ccb7df4c222f59ab838acdfd5a78. 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/DEC530940251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c37ff6d16cb9784b3ba41a3dc8575f116d49d7d29c86d917955700892f9091c. 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/TCABW1475078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb3fb2e01a2b597f5fc2f00299ef6c8dc3c5d2aaaf7e083db1ca2a1b82e9a12. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:55:49Z), 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/TCADG1711898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183e0a8f175729a510df8d8abf77f4026240d9421e1536fd04bd9c870ef58e8f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCADG1745135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb13a30526305f6a7a94ae3d20cb7c3cd343e4e291ff536f70615d5bf806aa8c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:56:19Z), 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/DEM071700231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bcfc33f61a2a48b89c2d113d910050c2b02314839151c90f118c88ff7ec53b. 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/DEM071700250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49dc9408edcff68459ccc58d0c47afa58a5fc0c61677ddf42313abecb1800137. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TCAFG2086998.