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 0x5b82a10463f3880105e356049cb9d57d14940423b4921704df5b70afaf1c477e. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4ccc7d5-0761-406d-b37c-1bbdc226f413.json and https://artists.proofprofile.net/proofs/artist/d4ccc7d5-0761-406d-b37c-1bbdc226f413.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 0xab9a70a7d5cd9b68b6d80f5ed700c2e68c5877b895f0d7a47f80e9c7e30cb62a. 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/QZDA72492154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d00c7f80c586e0add3bcb67e9fb290586c2b7d0b41f72abe2fdb5fb63f26adf. 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/QZDA72492156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71d880bdbd646bdc0e0e1caee69b69596f69949cc181201072b52d6146007fe. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:11:39Z), 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/QZDA72492162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5bfa94195a4e3b68af7e013e539c2c9470443e04ae98bd6ab2837417048095. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T03:51:16Z), 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/QZDA72421970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cdd116be033c1f1a15734fa2238bb457e6d9b415bebe74b0e2fa6c4bf33d984. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZDA72421973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497f6c3fce01e60f6a57d2aa278dc2af9d0b1b1b0f8604d9a847f5a10edea021. 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/QZDA82401415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2227ef987c56b888c4eef02a3d31364395720202086bdf37072955b879b0db24. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZDA72421961.