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 0x5d27f835459b12327cccb7615e00e664fadee1bd2e548347bfe021a3623f4596. 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/e6d526ae-ffb0-46c0-97a7-02ef6962da2a.json and https://artists.proofprofile.net/proofs/artist/e6d526ae-ffb0-46c0-97a7-02ef6962da2a.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 0x37b29e16b663fb5b1bd5cf1ae6fea3e00171cd6cb1f249499b9254ec0734f9d5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFYY2387701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3e9048cbcc863d5e46eed915f6c179a7ed4199a560544b0b0b15eb693ec1b3. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:18:38Z), 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/QZHN32324915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea48ad0bb9ec3a04db69078f8a470f37d6fee5a08a63f18efb2b2ae976f59555. 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/QZHN52309045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573332e27444cbb9ea996154b883f93d8e6ef338e657c3150d648d456fbce68e. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZWFK2323767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cadc2c1786f66edafa76274a5c232af1850a14cfe7e08cb6847e97cfdfb5450. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QT3F32431480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e357cc11499c3f2c5ea50c22480c07043518526db02f8ee7b2deea3d5341147. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ42447835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9049fb668c240b531d227531d3952b1d120d5ca85c62b4437661fb4731e1c5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:25:47Z), 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/QZFZ42447839.