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 0x87eacc91cc846b77da73d534346176db8e88f4cf6a7472eaafe0b6d88d78fb8e. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7651fcde-3334-43cf-a465-655b5da6430b.json and https://artists.proofprofile.net/proofs/artist/7651fcde-3334-43cf-a465-655b5da6430b.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 0xf3048bea2156d394d2c3603027443d7367d90bc6c6bc15633188627152dbae69. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/UKBPE1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519e7950403e37b09b60f83176c178447f2abfb69be738300bca5b54620bd20d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/UKBPE1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862a54726a20ac09c8a24ad83277e2d91b72b5eac10274415c12445bbf856d9c. 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/UKBPE1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299d207fd3c05187369c5e2b14d64a5b3806eecb8bc8fd21c1894d0d1371d339. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/UKBPE1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48441dbc37557c66f43ebbc3caeb98229e1d0334265f395dc8a78ed6c462b775. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:51:12Z), 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/UKBPE1700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f994260c0915375f8c62442c136827a73dfb5426832a93ab45fa8f3f0f1ec2. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/UKBPE1600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7835dcaf822fdc11b91831f637592e7e3163e5a09b14a85b5db6c4130aff466. 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/UKBPE1700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb523e298329c34f7331df2fe256c8e461a2e9564625c32f9cd9c79b55372b5c3. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GBKPL2033696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041dbedeb52ec7c89f8c8b30d90cb00f94739e7b2409bf48d41360357fb05a05. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBKPL2166958.