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 0x79920d67eb823f8e00e72f861053b68fb5d18da06781f9a93feeac32c8b52d1b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d2a328c-b420-4638-a880-ec03ccc4533d.json and https://artists.proofprofile.net/proofs/artist/8d2a328c-b420-4638-a880-ec03ccc4533d.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 0x06655ec6e37792e812801b9346ca2c18293c6eea215149dce641032ec2400714. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/SE6A91809304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46c5e21f92046abb5eaf552f7b94e2643164ef5cf533263b405742daf237554. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:44:40Z), 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/SE6A91809305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1148d0f718b18519e72d7b6ca57e8a2647b6ecfba4abb59a79041dac15a0d8. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:57:08Z), 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/SE6A91809310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afb1840a1af35d37eb0cb6f73cd53509d4118a9e5833eb05f4f0e51cec0b599. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:53:16Z), 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/SE5751866743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42bacf66f881ee960f9486b5f8735bdb80e0d8a04b8b9f6955efbf1d4974f33. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/SE6A91809311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9a692450cbc8b4c8cb2ca98a59bb0e64088f419036865d4e99fb4df1724a32. 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/SE6A91809312.