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 0xba13bed4d79a9f37a7b451de6497865f64911eabbbc9d325222650de8f704f97. 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/45171b74-9dfe-451c-9599-c3d3243d90d1.json and https://artists.proofprofile.net/proofs/artist/45171b74-9dfe-451c-9599-c3d3243d90d1.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 0x9e0871dfb04dbd671dc6456e6e581872b2774a98c52f14087ededa7af06f2d30. 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/TCAGS2237797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4487f6e95ad7d45ffb50419912449711501fb3caeff778202eda2cda44f44db. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:13:44Z), 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/TCAHA2307207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28384032e3eb6473f7749ab442af6fc77c6781bcd703aee52e68d3298783e1ed. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:22:01Z), 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/TCAIB2428399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76bd3bc1a86c5f4209e6987240cc38befd2fc8273958da031653190353ddf7a. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:56:16Z), 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/TCAIM2424532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8654f8867c5571fe482303c9b564736a968ef13cd399c4cb74c483738ab836ed. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCAIT2412215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e5c9f66f68046f7674a35c36464af609bc6dde636dc130a54bb7c85fea7d12. 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/TCAIZ2483692.