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 0x4e6ca77dd13a05fb5fb7615291c63219020050f2ed1877a67282c2b6bfaf56a6. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98a5bfcc-9a7d-4e3d-a2bc-5e087eb59059.json and https://artists.proofprofile.net/proofs/artist/98a5bfcc-9a7d-4e3d-a2bc-5e087eb59059.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 0xb30b576dbaa0eedd388b9165638cc21287200a68bfaaac9b4087c3820b245129. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DECY52200270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ce17319f06cd7242c6267504538256db2ba015917b946303755286631b337c. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/DECY52200272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ad718a558262909360d7083e39e51e453bc1c5e026b11f58f8fa0357c28347. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DECY52200273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ae6fda738d7ab08c8f81683037b069f389e580a7bc5e1be5db878e5ab4e8b7. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/NLS6R1883637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3f1c1192ae256d811de564f47757b13140881e16114e709f630c252a91a85d. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZK6J2012693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef11fde2add51173ea611517b10bf96884eabffad770daa01d63e550a8bdda48. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZK6J2012694.
Something's Missing - Paper Street Soul Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8118c2133b90a1c6b19af31656ed7dd4f624b451bb1c4caa29fdb8e35f4b6cd4. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZK6J2012695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8ae6d9fe44c1e11da59640e1e4a12ccfecf241684fed8bd64270c908493bef. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBKQU2300500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859ca53765b4a411d1689a581fc0ff7e507d0e5c7a4790a2bba2a35803f5d0d3. 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/GBKQU2300502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce45892805ca1215b8a49ec6d279eafa47dcfeb25246e79a7f38b04ecb139c0. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBKQU1460633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47f7cf0ca0889a423914db0682b50cefba5e2d3a5d3273948e2d889a309fedc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBKQU1460634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7b5dd0b8b2ce53a4f281c081633abf579e1b749fc783fe4c82ea0a7734c06b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBKQU1460635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e3cce33a21e653c9d68d2b2f169a2198956b50a44883dce663d5a05490b751. 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/FR6V80325433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375141246315884b95fe467d5a3b8f0c699545c07613f256d228fc02c2f104f2. 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/FR6V80325434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67aaa93a3d4a4425732a9965df05c27da8b3e52eb89199a854d42013c99e1b7f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FR6V80325436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9324c6ab84df80005d42d67b1f5e468ed03b4b3cc10ad482e2077f7f1bccf5bd. 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/FRX201607583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67624c6e83e2b4c9aaeff38bb67fb146cba3d05e698914abfaf087b932b8fc4. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/FRX201607584.