thumb|The Seven Works of Mercy, by Frans II Francken, 1605. Mercy (, ; from Middle English, from Anglo-French , from Medieval Latin , "price paid, wages", from Latin , "merchandise") is benevolence
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7268e360aade52711ede12b97a65c5504d6fc54e8ef80cb053b97ecef5c96b1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732224351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f74c5372f13fb651d269660b4b34ef2f2c473b0043d08df143bf8a606719a74. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732224355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70902ef2087831aad0c02d2006fc793b8dc1b8940d0218a10326ee5fee5c07fe. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKG732224358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bf0543b7738b94d5a307073c32a0e5bce2dd559849ff1de3344c4abdb9e063. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKG732223568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777e88d518f85d5758de3ad790c3e0f79a12a1a516204d030a1044218d7b3c9e. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/HKG732118262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5638f519dd9d1b88116a9481a7abc33b1d9811521943a6e7430e9c763124643. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/INV882100002.