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 0x1cc6ffa626910772db0aa1fcb3c6cfa51f441aae474fd56e44b9f9ceb73d1348. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28f55e40-6e64-4e34-b143-b5732006e0ef.json and https://artists.proofprofile.net/proofs/artist/28f55e40-6e64-4e34-b143-b5732006e0ef.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 0x40869d29afbebb115763d3f7d8d4836ccf23058265fbb02b6242d99b8d0df4d8. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:52:19Z), 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/QZHNA2551510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab20e6c52a61877fa8f32377acfd1328a86a585369f340970882f5443382b3eb. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZHNA2551514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af3884e2f7f78c4654582f51d49021ddc5961032141d1a6d1865080f976bdc7. 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/QZHNA2551515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ad8b466165f0f9722a590cff2807f4b37534c6f0609840e773b1d46e22eeff. 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/QZHNA2551523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88820dfccc44d36fe889f325f29824357b47ab3dd576ce18b94416c394fc9be2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHNA2551525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc658b497504e2dcbb312f6fa347313f6af1f2d0596395af9d6f40b9ef9c2ca. 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/QZHNA2551531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021e385f6cbec5d4d2ab1a0c77ad441d6f6ac58bf7ad40096251a153988cc476. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/QZHNA2551534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc459be61dcb1ffa2588872ef39e6bd3995a3b835e6c96fc843c78a6d22a9c6. 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/QZHNA2551576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a79124e2399f0807866f87f0dba0043833c8e6fa444446d79067556c45dd08b. 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/QZHNA2551598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8233f7d37df8651b3dfc5a552b6c54273e81fbfd94d45236e4b7bfa8677dd2f1. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZHNA2551599.