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 0x11297f466c72a1e4df1c905f3dde784f67d30929dc0d681b88094bbe40056120. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe981d9e-4029-4767-ad1d-e0e63ec7d576.json and https://artists.proofprofile.net/proofs/artist/fe981d9e-4029-4767-ad1d-e0e63ec7d576.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 0x56d05e973992912ac79eac4204b53bb5cd373d00baeac5fce2726adfc68cd949. 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/QZK6Q1929369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b12b781b67b0e155e8f488919193a45a3ceb402a90dfab44664330c42a858ef. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6Q1929370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fac8b9d29a8cdbbcc689fb05df74aaa97646658f030c6e346d31027884f386d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6Q1929371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe866b562f04fe21d9baa4a1ec67b7ca0b32b2506c75f8cf107c4cb0554efcafb. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZK6Q1929373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780e2b7c5b5e3300c09968a15804b3c1abb6cbe07be2005ffe3f1060fce2719a. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:08:36Z), 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/QZK6Q1929374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb6bdeb4c076052645c8904a7965f8e6bc1c2a59074b7a20fc18b7dca87b79e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6Q1929375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b495907363b809fe09aa36b6d1d3f716ed3b66c8a798cb94007bc1ee6f09c6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6Q1929376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa621bf809cf0d22c3931650197e182aeff307b23acc12d9b9b6db7a0e7cfdc2e. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZK6Q1929378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5d7faa75ac68c00b805003311a43a09c8c57a05ebf63e26d8d260128293646. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZK6Q1929380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59677f81edeb9c8b3e2ebf3d6ef56cbeeeb5ec4753976dba4c75cb1b203f4dd4. 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/QZK6Q1929382.