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 0xa895f62ae962f3af7d82a6f7921f108c0ae1ae58a9aaae235de82fa0e8c24a5b. 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/d9a260d1-2f42-4a46-a1eb-9d5c990785aa.json and https://artists.proofprofile.net/proofs/artist/d9a260d1-2f42-4a46-a1eb-9d5c990785aa.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 0x4cc81f82ba0858590cc7eeed53f7ac5675cefc826a6a6bcc006b98bf42248471. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:50:21Z), 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/ARY391500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab2a27711593dc2abaa916aa42dce6c4f52cb578800018f77f3cf608f7597e8. 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/ARY391500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55fc3cdf40a44fcbbd7ad970ae25bd66b564c32fb42b5f4f8cdcc6941ad3093. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:05:51Z), 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/ARY391500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf106cfe807aab3cd2612acb841f9dcfd0c0f8d2e7ec2a8eec5982b22694298ba. 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/ARY391500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d9bcee406f3dc10262d34f95e6b28619d25a009cd82ccf5060269d04acc620. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:27:05Z), 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/ARY391500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb81a6e456245ce44c45cffb2e155d8b1f86c0d11c09c228fb0303c32ee725d5. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:44:28Z), 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/ARY391500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc481f981cb8c83ec04598183d9883745fa313945358d86b37eb12e7e9e2f9235. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ARY391500001.