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 0x9937be3d72e62e0f07c2fa5dacd05e5877034fb3fd61b25fd39306d796d10fe3. 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/93c75413-80e7-4930-a26a-fe23c9224530.json and https://artists.proofprofile.net/proofs/artist/93c75413-80e7-4930-a26a-fe23c9224530.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 0x06eaf94dca7dfad924e4cc9cbff4cadf0f616aace3c10b507dad86e759d7d705. 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/NL1AP2028059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5109e35128161ad4242c3eb953d63f615e0f820457a7668379040152945216. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NL1AP2028060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae01aada3f3f70c45b0bd632f6e8dcb98eb7a20e57980d5b69d6ddfd10b6282. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NL1AP2028061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9314d3c436eb344bdf83816fae533b2f137de9e2831bbcc6c95888fb326948a7. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/DEEP82200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2c321fbf24fcf9c1bec54c62869c7d68bb6ef7aa77f1f6dfe4f90d3b8f1db3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEEP82200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca703d7bcf48b97ba4027a72ed99f5063812eaec7e30f5dd8d3078e0f99041a. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:10:16Z), 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/DEEP82200068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0519314e60934b9ec9326a638eaa4eb06b3731d09afccdbcd4032c08b3a309. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DEEP82300125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0490bb7b8d3ec48a7435b0c776e187a6e74bb1d5c2a4f7fec70d6258a8ecf73b. 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/DEEP82400496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fa27681745365e0e3f90ffe0ba8705751e7362e36faf2e91e44a1e362533f6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEHK92104692.