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 0x5b3a66d2d6ee07a78a4c98d880ccda7c2a265033399921529af71818aaf92432. 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/a5c0d103-1a32-4911-ae2c-e1ac9c4f11ec.json and https://artists.proofprofile.net/proofs/artist/a5c0d103-1a32-4911-ae2c-e1ac9c4f11ec.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 0x9ed72e60b5ef8f63afc820f1b7f1ef912066f938b19f4c0bdf7a8ed124213540. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:29:57Z), 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/QZNMW2456530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb176764865dd652287f13f0d174f7ffe7f84668bdbc22804c009fe4db9a93eff. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZNMW2458202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efc4fc66fcbf449117fc3ababa05aa549be3daf679ec7a01bf18bcf0249291f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:31:40Z), 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/QZMEV2543523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec6f45dbf24080868d1f8a18e1e55d13bde730e4113cc56a94845d75fbe93d4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMWW2511164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf261cdaf879d156043d59d1f36af972b016356b914d83d09eb3a8d4aaab3b550. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZA742524534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617d60a662511372d1c4bba1949b9d97f93b9e263ccf1cd8173d98c0e0865aee. 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/CH7812536617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84de304cdca699193fdaa07543fcc9d1f3c2680f7153fff34355d3579e57a894. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZA742525319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5668ff35d2c5c14b6316653d4097be1f1271b3cc0154cbbe7537d3b182bdb3b2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTGW2406604.