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 0x5e6358b46a5731321281a5d16490615f2550ccb105a77beaa2fe69647d79cdf4. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bec63d6-f5e9-4404-9cd2-0f94ae9d6485.json and https://artists.proofprofile.net/proofs/artist/1bec63d6-f5e9-4404-9cd2-0f94ae9d6485.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 0x342e4cf23871e6e723adcadf98be18c434c2015265d8151d231f32532b7e3970. 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/QZFZ22004279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd289d014cd17e8f0eef8d087ab3d825b83c0aa416fc6559dcf829346632b2e0d. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZFZ32036719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58782e5825858ec2c2b4f38af8e3cdc8d1a9e048b9565b13fd9cb4ed3f80119. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ32036720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ed1ce1ea112b815d4f28f6d2855d8528845dc8f67ee49966a319a3c438eff1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFZ32036721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7739a73d8d06ce9c484a4d1a690881cb46e34e1e32d2db12d7f1d0856679f7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFZ32036722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6db580c72d6217a915d1238a0ebcb6410378f872e1f75784a94c43c81f2dfc5. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZFZ32036728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c7485579bdb6073cc0507622b7ca414e81ea82cc05b341d1a8fffb2478ba98. 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/QZNWV2274843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7be2f2f172cedafa0fe0ec1aeeea35c2e9348fe256a31906c6b7dbc2f3e2a1. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZNWV2274852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69bf4ed92a739b70dae26156c0a5ef5e452e19ad04cda15587ece24effdaacc8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:15:09Z), 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/QZNWV2274853.