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 0x493af68168cc6e9025a2e18b61562b97f9fa85d2122a2a300876a2d2f5b7d923. 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/cdbdbdb8-d274-4f90-ba50-ed8376a0973a.json and https://artists.proofprofile.net/proofs/artist/cdbdbdb8-d274-4f90-ba50-ed8376a0973a.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 0xfbea60c04556f0c8a68bcf4d1111aa8c0bfbbeb73652fc8cb1b067c1b3240ee2. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZHNC2320821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3931275bf72219f106747d3f0f396ddc8ca7e3a9dfbb5be9a7ce106a26bf555. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMER2470593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217a6140f066c1e8216a19465a9130846f34a600847a7abab147a5402f8bd8f2. 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/QZMEM2494860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31434409c469775af8e5fd1e5774fafc149ef0377c17aa02314d6b6df5836cbf. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:37:11Z), 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/QZRP52463948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cfc769fa981f0df1c47fb86d253ba09f37d25f14f925c5c83c891cfbdf76e3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB82483633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b52bfe122f583a5c727b6c57b03e5b8b8fc0a68a22dc4b23b1bc6db8e5d9fa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB82483635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6496fa0f55efbb6d320f2fd37ae2e4b077c8c6b6b0afd220599c424c8969c54e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB82483636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10dceadb45aef21e1e793d9adfbed1ce9120fdc46b0c7d1177245805170c8918. 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/QZTB82483640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf5895ada7c59072dacd109f77958233fed18d3cbb197370cba6792907ffe77. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES82577428.