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 0x01ebdc8815a1f07b6ce29150e9018b38e233932ff034e20445654e1fe39f554e. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4644767-65fa-48e5-822c-1e9ce6d1630a.json and https://artists.proofprofile.net/proofs/artist/f4644767-65fa-48e5-822c-1e9ce6d1630a.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 0xa0e542515103c74e86c4c25aeebb8c142bf7255f2a3585ca9c32619bbdabe9df. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZPJ32371190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd23e9356b90976a369b5e973d66355d7109a69f1720187c067dd749e3838d7. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:31:14Z), 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/BGA472422724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7435782f1fa49ece3e0e32e2f6147b4caa50461cf6f32ec8e74d835eb040b17. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZPJ32444913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4fe2f2025b2c40e25eedd886e2641eb5957e7af1ed2d4abd6e86f1f948d9b9. 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/QZPJ32444914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f5dcb7d2ad768149b0098f1e2663e3e0bb3be4a7474f37375a3b98e16c0238. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BGA472441867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee6851f95506b336df978fabb02d3d402b9fbf0aad5cd10ec6d1ac896c78eb9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BGA472440950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd7564dbea135844f130400b37371673091a1fb636918c1eb3ac9e307ee36eb. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:51:53Z), 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/QZPJ32341423.