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 0x385ebacad52a827f66df62394cb0944adef09823aff8401a310a148d0a1a6dde. 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/d7ca9e6d-09a5-47f8-9298-c6ee8d8b8e9a.json and https://artists.proofprofile.net/proofs/artist/d7ca9e6d-09a5-47f8-9298-c6ee8d8b8e9a.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 0xc5358c86e1c557b1898ecaea8c8591e74c504e5be8a0d1da6516033138e9bc98. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/FR59R1940541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f69f5554d54d966f26992d74a4ac258d130b304cb03f597c4ea7fe217191fe. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T05:07:12Z), 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/FR96X1962343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0820f84fbc858fe4496b8165cf67ca11f838f050fc1ca979d237b8ef9b724154. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:07:20Z), 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/FRX281932960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb15a0f422f96309828dba4b522a9cecb3a00deffe05c57ba9dac940e5c22723. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:50:06Z), 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/NLRD51962957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fb79d3ddac4222bd8080fcc40c75523988d314c0a131715be4068785cbc494. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CH6542168047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd032560e6ab4e15406941aebfa5d4eabea914fe0a9dab08dfe6721e1dcb30870. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/FR9W12144779.