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 0x26f17a55e7ca98615ac421c7870d1718c734bac5d030bc9de2efa0556f9e5695. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f42b5e12-e3a5-4856-9c18-0580a46480ea.json and https://artists.proofprofile.net/proofs/artist/f42b5e12-e3a5-4856-9c18-0580a46480ea.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 0x5d4013264fc4f4b5c48398e008cf17ae166db7cd35ffdb3b505b827e8e6addae. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:20:20Z), 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/TCACY1748828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e9098a490d5c90cd404e6469ae0a573f7cc25045baa1d835409469e3ea582f. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/TCADN1824622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80ad7231589c77715119b38abcddfee9fc4c8bd493def285364a1f8c44f9e15. 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/TCAEA1817604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5520bbfee0b95911dc7f139c13c9882fea91175ea5748fe1da26b1f2adc078. 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/GBLLT2018396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52bc6799ebc78ffecdc49ee22ed8d683fd99925c73bf3e77db2fd6897d2c8c35. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/UKTP72000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073c3ed66e4c1a89e4438116ab422b2d96eca8827866fb66aea7e3478a6bc0e3. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:54:31Z), 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/QMDA62448424.