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 0xf786284ba7dd1c452c1b416a32cf940dfcc75896ded2c3d709e7739c4b10aa37. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcdfaac7-93a5-45c5-8488-f36fd5ba39d2.json and https://artists.proofprofile.net/proofs/artist/bcdfaac7-93a5-45c5-8488-f36fd5ba39d2.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 0xaeac0a7aa830a20b93a04e5fa3841cb8a3e0d88d37c03770e7b3695681ded0db. 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/USHM20702137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d1f578e3c9ddfbfc8eaeacf10ede95693d22f9983316edc2f82033237216fd. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QM6XG1500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b34aea99a89dd149051a7302fa5b9123ba06555c47396519ada35c3e527c01c. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/USWPG1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36119cad6ca9a2ba234c7d8f3863b3b0ff46dcd8a0da64c4428260b22c04a820. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:57:41Z), 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/USACX2100639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c48176474d16994f88b85a27bdf088baf2adb2c9817b3da89e5503779d70d3e. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USACX2100640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd2feb357e8e2811d9547a08b2f42f461a4c365104cd9b20de1b3a5fcfae008. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:28:50Z), 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/USACX2100643.