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 0x0982dba1ebad2cf03de38f37d580e564e422dba9cdace94a1f24697d2ae240f0. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dacc81a9-33de-49a6-b161-701dd4fc3787.json and https://artists.proofprofile.net/proofs/artist/dacc81a9-33de-49a6-b161-701dd4fc3787.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 0xa28ec7c305d5684da1aaaf49f01edcbc66cc56c0df6d644b433bd2c2fe22b610. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:43:51Z), 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/QZS632575511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e958dae2413d622fea01336b0718c5630dfd771e4cd75738994ebbf9942dbf. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:03:25Z), 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/QM42K2508962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb8e5d594aab73ba76622944eafde053c741474bd3d91674e0de62b311faafa. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:08:16Z), 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/QZS632504411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481490e101b83be18cb43cd78e31a470bd52d8bafd6b7b63076eeb6198a2ebd8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:29:02Z), 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/QM42K2589893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6d65d38939001b2756e3f2d212a23a7dcc4d143de24dcfd3cac8784692862f. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:10:40Z), 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/QZMHP2564587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f54e9da4b106e646d9b253804f9e887d6e75be6ccb538530d4d4ed61ef05452. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZMHP2555029.