thumb|"I Shall Make You Fishers of Men"; a stained glass window at Kilmore Quay, Ireland "Fishers of men" (, 'fishermen of men', from , 'seaman, fisherman', and , 'man, human being, woman') is a phras
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 0x817d8fa3e0fe1756338e6d94b7450e702578bfe36a8b424dfc763f9740eee0d2. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f148e99-e1ff-4d8e-8680-62991173eb75.json and https://artists.proofprofile.net/proofs/artist/8f148e99-e1ff-4d8e-8680-62991173eb75.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 0x2a0dc1cd63a709005417c6bfe888f738adaaa4cd7ec3e0965dc4205753b778ac. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USHM21619403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf27d5c5ef007075c7f4c9385b212fd10cb55b381881ed8688217297b5760985. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:37:14Z), 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/USHM21619404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6b898ad37268bab7037ec88708915cbb6ef3f27b548b83ece9ece8d96850b6. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:50:28Z), 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/USHM21619405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11966089e37d73437e4cd5c4682817236ea3526e2f7cd2f9af8a0488ed87c959. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/USHM21619406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adb5db380cc6be99160064dae503e646601d245354affa759497dccef633bfb. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/USHM21619408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cdbf2114df656ecae55fa47e071444e92f1f5d425185f0c136a0e46804afee. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:48:53Z), 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/USHM21619410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf58a2e8249ca03037c8dd6f9286f32388097183d784e313f0a61328d03dca9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:22:42Z), 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/USHM21619412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0a5773e8bc33480e3769629ed36594d49892bf5f1cc02e849f3a09897d5fc5. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:52:32Z), 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/QMEZE1773239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7dc80889f365462cfbee27127bac0d5911068b45d2299ebe744538849015ff. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QMEZE1773242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8af8994cde3f8b84c64f9252797d2d5c095ec4e3ae5e66775d8234a1cd48916. 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/QMEZE1773243.