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 0xd7d844cb42f5c419f55a64c9c003c505f038d7e62675d94ef6e229a05210c9a0. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbc7aed7-5763-484e-9bf7-789d959c77ac.json and https://artists.proofprofile.net/proofs/artist/cbc7aed7-5763-484e-9bf7-789d959c77ac.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 0xe0b9f7c7f7c71dd31c111242abe0527a69b2c953ca245bc06edc20cbea908156. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:43:52Z), 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/DERH82463510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769d01bbe5f966eb8b76600b9585164983dd99668daa8f673ab4ba0af20d92a5. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/DERH82467201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6deee422f90d3909c5de66a39f3e93fa0f11f44340ad8275aa81e980395c63. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DERH82467203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df101ce95edad3b5844d20327eff19d52043fd39dd090c0ce301abf1e647504. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:36:11Z), 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/DERH82467204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243d5a6c1840048e682ebfe81574f963573f657f393c4909115f92ef1e1d975e. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/DERH82467205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27093cbba21e0ac9c2f41cec9542ed7ed76e71ba24330ecea551b7874324815. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DERH82467207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8face9a7cf8dd8024930e707f579179db29905e47b8ef8c35575b95d9ad5ccd. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:38:21Z), 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/DERH82467208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd6a64dc6cdd5a73ce4122d1197a74fcdc5cbc5aea00c1ee0a791ad40c405bc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DERH82458101.