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 0xb268a1891f54fbc541702aed5838ba6bc31e952484497eed57c4ebcb9a0d4796. 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/e79c237e-57a5-4211-9641-c31fa3a8e354.json and https://artists.proofprofile.net/proofs/artist/e79c237e-57a5-4211-9641-c31fa3a8e354.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 0x33f06eeb58a933649fb5a3f2198c1203bb8574d19414194ae8051c2acc9d7546. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZDA52324908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8542b62b6722be2118e10a316358f4188b07a32c3e94fee439dba2ef3c90e1a. 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/QZDA52326719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c695d7affcaa28b02cd68157561d2ee04eb5947981888aa6f5f3fe2a84ff00. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZDA52382647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6554ce575f360b2b7c32d8cfa975d490c53102830db6c2c074cb2aba0cbdb9. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZDA52382676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e57899bcbe21779e394dbcbedeae3a6665616606185560111b55469648adff. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZDA52382705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcfc5634689b3afbddc72581c353835a87892139936db4c98256334ee735b81. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:15:01Z), 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/QZDA62396736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa27f9d9ed44d63219d9271cc948d853eacf5a31526be5822587ab7970621bd. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:51:39Z), 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/QZDA52382652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97591d0bc21c1f7d347dc9bbe7de51bf24e552f743bddec307d4b7b0379fd39. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZES72333950.