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 0x966c8328d0d8c9cf88122b8d89d4dbf5385fe59269e594d619121d114fc44b5e. 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/da492fa1-29b6-4a36-a089-6b5c07950adb.json and https://artists.proofprofile.net/proofs/artist/da492fa1-29b6-4a36-a089-6b5c07950adb.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 0x6225bcd94f8810c4e32f29ba62b46dd15a98c6317540a4abe4e35d484f19798b. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/UKU6H1941846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe2f6276159b9b652e27b6023bb08cae498c7704656b2f13581b4d28c31e48d. 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/UKU6H1941847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520b62362f05c0b101ea8f519165cffaef5e30ce5ded840b9e3f0cee8d81b78e. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:37:13Z), 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/UKU6H1941093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7383da320bed875ad9523768bc820e662773e50b28218a6ad90e3262439ecd6b. 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/UKU6H1941096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde52a7398dcb861fbb9c7786ad710310961d3fa43cf0aca635f533a5ddee8c3e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:54:36Z), 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/UKU6H1941098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3fca961e8e962dd20b9fdc104c0d2fb9ea3c4c34f93b36d338d64746783c3b. 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/UKU6H1941100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcb940791f8c8ce444f94fed99a82c050b87ee7c056b3c2f3140526b6a41068. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:32:06Z), 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/UKU6H1941101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff8be296f9b476592320dd0e510166fe2c48b5da633cabf23ac8a7ca049a514. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/UKU6H1941104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac511ceaa0596fa469829382e521f42fec91c7038fa7173c86cf757d8b97081b. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/UKU6H1941105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5331d78fc5463566dd75ca1c77ef867a1fa5b36450e06a4b53bbe96fb9b4492d. 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/UKU6H1941106.