thumb|200px|Bouguereau's L'Innocence: Women, young children, and lambs are all symbols of innocence. thumb|Innocence by Pierre Paul Prud'hon, Innocence is a lack of guilt, with respect to any kind of
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 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 0x5d1bca0d94d64607c6bb10a79876699fc950e418087b0f68b704ef664f8b4d70. 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/80e6e4b7-892f-46ee-8e0e-aae758ecb2cb.json and https://artists.proofprofile.net/proofs/artist/80e6e4b7-892f-46ee-8e0e-aae758ecb2cb.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 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 0x0782f650efe059a816908257d450bb64075abf716bb2ab7d56728dde2432fa82. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/GBAYK9000133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc63ef69358b8de8c7aba2bcd90163515aeff405cd86fd00f8136697f43b2a8. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/GBAYK9000134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb272fd73aa88143d789a9e29b65b1faf3091cf1d985e0457ee958df37a79d9. 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/GBAYK9000135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c46e31b7db71ed1daabb6659ddc105c8d1cdde0b81d356b5092f8a9be578adc. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBAYK9000136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa359d1def08ab33e609e83efb8022d157d0b7b04f083951ad7da531b19cedc33. 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/GBAYK9000137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06006540e6747edfaf2ed72adba18d122754eda757d22d0b8e65dc2542f9193f. 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/GBAYK9000138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bb3324ff63fdd73df3b477c5ccf889d96c7a221fe19e6a1372a6698e891eee. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBAYK9200115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d919d764f7ecfbadeee2199d352c6cd401ebe502aa2800acefafe5e87203094. 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/GBAYK9200116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae882e81c143b9987df4ef2b9d40356fac2875c4cdb9276495643be9b0a84235. 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/GBAYK9200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b40861e23663b03a23e5fc556e4f7a22296ddf0f6b59aa1dd7b4f823e0aebb. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/GBAYK9200124.