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 0x13c3d7f5543f3e73e5cc3c68995d834f1c915659443dea79906a62fea117baf0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca696d3f-cf92-4cef-b2e3-b68c7809d1eb.json and https://artists.proofprofile.net/proofs/artist/ca696d3f-cf92-4cef-b2e3-b68c7809d1eb.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 0x4eac915de42419c3f5888cff8e84e415e77d532a3ec1adfd87b737228550a4d3. 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/TCADE1745216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0f2d37a85351a341c32830aa8fd9e77ab00604342b22188576c1ea360f27f6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCADE1745227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e66581f1d483d6ff2f2fda7cf9106a2910460393fe6be2b441b9f65161ccb0d. 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/DEBL60465269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a5fa33f7e08b45ccb6f8f4d443ee7872d50f2c6ec59acec88e7be830d4045a. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:32:48Z), 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/DEBL60465275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c3f316acb2f7af8d36b024e638c484ab9c6a8792f317038d123d50b5d562d6. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/DEVL11900524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c810ac7989a783caac507e396d2f92b97e7958b4e1106d4c2f14fa42386b778. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEVL11900532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3110efd64fb072fa18d0847b53625e1a07a7efb48622fbcc8490b537ceccac5b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:34:20Z), 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/DEVL11900536.