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 0xae6b498d8c8c6d468b2c10bec25bd9f8087e5255135967f9979942be1ef4ea5d. 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/a7361034-2fd7-4c66-9ae6-0ac3f75f768c.json and https://artists.proofprofile.net/proofs/artist/a7361034-2fd7-4c66-9ae6-0ac3f75f768c.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 0xbf2e292f1e7f8e531b72c2ed10d877a4e3bffa8419bed6de79992bbf400b18b4. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/INK602101005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf68d98cdef4b9b89943e8925a67a80f51a03d776a5e76d8e88813a4b32f5c30. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/INK602204736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbb001bc194c1ab0b75749a9edc232f6d2a82b971bb5576eb8da18e4d6381e0. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:57:42Z), 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/INK602204737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc473fe255bc225e2251b335deab812b40a17ec846ab6021a42d79f7e05dfce23. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/INK602204739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc760fefd39f726ae056a8da48ae365c10e71e38d42a2e691a781c33ded9f48. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/INK602413364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b09165c8b5911eae232bbd3a8315864eb42821efc4b10a192942f2aa50e331. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/INK602514008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb325c110e1635055688a324af815405395f4611d84afc1ce6288761250d3741d. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:27:59Z), 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/INK602515906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4caf9f4f57cbf5c8cc635d6a819e15b4369069e72095a4b4480527b25cd817. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:01:29Z), 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/INK602515907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc624815e378dea9dd2cf1607509cf8ccdb0865a38eacfa8cc90e72eba995ecbe. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/INK602515908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f68004c5f079a486db65f97548e640e4b487ce3a724b0cd535e312491656d9. 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/INK602515909.