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 0xfbfb66c1499394cd8b74784e4ad7f4d192e4df494c200e838f110caf51de404e. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7da3fd6-50d2-4729-9fb4-2b84b14dd8e7.json and https://artists.proofprofile.net/proofs/artist/f7da3fd6-50d2-4729-9fb4-2b84b14dd8e7.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 0xe42b6ab06ad60af555a8d2959f0439f287f8c569ae446c48d28ce454662a0ea0. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:17:07Z), 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/QZRP52195496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1878d9707454ac589211d78a974056444c0a348691fc8fb7459bff159f1167d5. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/QZES51913641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4d4cff58132bf35ce551efb0206caed6ba94d35c4a1b9a25fe54b1bdce0883. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZES51913642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b18c52f1c8f3fcce4e9de4dd575198c34ccc608a09ed0002c0722ca98dfa56. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZES51913643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4457c613fdc705fc14dd612d2a7efa8b9b4d51ea12a4e50774f165370e48ce57. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:54:33Z), 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/QZES51913646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc720526a781c4b53bbe089c3cb667ff5b468d00264fce137ffbb6db7fc62b8a3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZES51913648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f54919575e0ac5b90ccd02e5e138176133fb0afecd813e4c4cd943e6de3dc5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZES51913649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0b2eb5f0d271cbd669a8c100e2b435ed49ce6c6afd1dbfb72c53e6179b8fbc. 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/QZES51913650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6b91621829207b83d12edc39de2de12f502d950b83877a90eee582b2ead021. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZES51913652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb695afda1b5f736eeba5221104d6dd0daea2a2a90f5057ea2c06c2c67ed0c4b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:24:55Z), 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/QZTB72280249.