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 0x9e1566c17f8219076e595a13757a8761c5de930c95ca493c3b4bf53d2d4acda3. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fdcadeb0-9c9e-4140-ac71-ac759a0acb42.json and https://artists.proofprofile.net/proofs/artist/fdcadeb0-9c9e-4140-ac71-ac759a0acb42.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 0x0331c1277b9ede2968126fdc575ce7beb73e92a55b36f27074b4850f7c11e818. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USHM82365739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bf8819e21ce4aff0efaa3603cd48423c778f1e927d95faeadbf61050f174ef. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:44:45Z), 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/USY242465573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b092026f0d6e375514d013a9e7da5101c69c538df4e690f5c5f9da7fd38d8c0. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:49:37Z), 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/USY242490747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649b0685bbb85e0a22fdba6450d28d4b874cb7422f2c03d3ba29d38b21a8c4f2. 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/USY242490776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe90ff487d8f67e5f7fd98ac3b8a04865c98081f05edb625766a8625c36890c2. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:23:43Z), 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/USY242490791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2561d0f64615539b403e66a2fdc2c66fb421907cdba126d4c4eabedbe984af. 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/USY242490834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4e62f684134b6e997010691b7397174a4bb44754c68d7df8398b4439a05e36. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USY242499577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220830adc16a251f280438a9d56894794328220239188ded1d822a1f8388bf45. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:24:26Z), 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/USY242499578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2550baf5476869cf9ea04d7cf9fcc64ae63bf84a9a8babf8b554f043cb2d6251. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USY242499580.