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 0x8811149cade80546e07d0a7c9a0dbee4718f28cd16c84936bd3d3d7980c70d39. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c528ff2-d1bd-4402-9a56-95e79076fffc.json and https://artists.proofprofile.net/proofs/artist/5c528ff2-d1bd-4402-9a56-95e79076fffc.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 0xc9de0bddacfce561e2bfa051b86a51235afc6bf790199bfea67b80c875b85a27. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:45:31Z), 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/QZNWZ2375503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e88b47574e37db032b475e81de35676686f9c82497545e8cc4d2d9ebc7c07b3. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZNWZ2375504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7443a39163dae5b70a9b7405ab910e2e1afd7f34d666792fb9b7b1776f5211. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/ZB2QC2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c0363772b5afc3650976e4f933f07518c1f2f9e9998b9f1dbae3fcaa6be505. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ZB2QC2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407d3aa67fb3ccd3fa1546eca8c751aa3a909b57220789b984036d851a99f960. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:33:47Z), 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/ZB2QC2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3728d113b1f42bfa55df771367f0e5e86a3af28b15401def196e2c0fd848c94d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ZB2QC2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968332a712dfd3a9d16ee1467104ae3177f308f98e18ae8a971a1d29301a8bb9. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:03:23Z), 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/ZB2QC2400011.