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 0xdb73f406b50823cdc46c11236fd2d3d07e9b9bbc25590fb75be8d945ac85611b. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9f96a28-7765-46ee-8aa0-053c9c6c456f.json and https://artists.proofprofile.net/proofs/artist/b9f96a28-7765-46ee-8aa0-053c9c6c456f.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 0x3c972539ffbc95b1257f8b8349c0500bba78eb3182075fd6da4646b4fe15cdfe. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:07Z), 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/QM42K2567865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97fbeea48f60401e1330f29228ad625c3e79476a6115ce7c4252799e35c544e3. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZS632577292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0dcad9782558364223d2275e095c232ae8362cc6ee6844b9bd69221f6049f53. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZMHL2557718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ff3810456958ed0fe8b229a36ea4df1077bb6154924d55126576fe05aa89e0. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZMHL2524296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d92e0167c6612cfb9f11b21d9c6dcf1a28ea3701469ddd3563dc6cb39b2c4a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZS632594958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2d99eb2df7e6abb0268898a970bc28fd3ebb0c67422d6384f0eb2fa531bbe2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:17:00Z), 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/QZS632528642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976059c6fee09bedb5e894334bccc2fdc40e266499f53a7fd9f09e60c7c434ae. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMHK2598464.