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 0x30aeb969fbf76bf249c09e0967c2cd9b5b9368d58f22cbafa98d25ccdf246ecc. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d331083-e957-4f9a-a801-ffe966b75bd0.json and https://artists.proofprofile.net/proofs/artist/8d331083-e957-4f9a-a801-ffe966b75bd0.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 0x719a0a897fe24bfdac0113e586218fcd026473e167dc0ed5f00ec048ed20cd41. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:46:25Z), 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/PT4CA2033885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cfeef3f5c6e898cf4e18ae719c3494e215af073150e432835b77cae00fc342. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:40:21Z), 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/QZZ972424045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e16b126f9ff2dc754443e37bae30d2f71c659208778d72759e2226284ab5e9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ESA012579384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee4c5b7bb1d8e3be48c3445823c6625967b7b3b6956e2c9d8aad65f232db028. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ESA012579371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10731561bc3a73b4c168f814158d8f8c8fea185cc55b56afa4ec53fa9e736ea4. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/ESA012579372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98737cb4e7dd187a2af1a49e415c851d746e2899fd585e4f6e56ca96a64a1ce. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/ESA012579373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd05cb1381494f48f8e0b5ac2fd9df43ba8147d394d75993fe4d0e4ba36c9c1. 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/ESA012579396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4852f28b2b73a1308f0e163c9cb1180a3f6fffd487368659941cd02261ff4a5c. 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/ESA012579337.