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 0xff73ff5fcd7c0ae755507802ea71a23f61f8c05e92527a9eed9f65a8467fc40f. 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/efc1c51b-723e-45b0-8449-227a0d54f6d4.json and https://artists.proofprofile.net/proofs/artist/efc1c51b-723e-45b0-8449-227a0d54f6d4.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 0x90603c8f9ef5f8488c6d5baedef1ac964436f98f88ea03c62e968000013225e6. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:07:40Z), 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/QZTB22384483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0847913b02f8051392794bbcc6421db63309fc206499755f900b8c37b8fc6c33. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:00:25Z), 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/QZWFJ2362157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b0213bf8305a8ef29088d6b5ce6eccefa087fc37832eba03c044cf492d0002. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USLD91759497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf091c922ee06ea353fcb7ad76cb8f0f2b2352a7904b3e01f83001a5b41f0ce. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/USLD91762269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf273cd44d49341e31d01f6ac34a12dfa8f4780d752e46b6f12db8f29b1437655. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:06:42Z), 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/USLD91769995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b334134dc8eaff77dd24369871b7d701d48a4f108964c0bf9cf776627885d4. 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/USLD91778406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167eb2af8e4dbff167207939071fd1171d0d4e3e2fab9b4b5296ac98f12b7631. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USLD91780137.