thumb|right|Minoan gold votive double axe or labrys, less than 4 inches tall. On the left blade is an inscription in undeciphered Linear A; possibly an invocation to the goddess Demeter.|257x257px La
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 0x735d5acb667cabff5097c607ce0303c385e8fc8ee40e4082bdac45459acc0088. 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/96b1b4f9-48d3-4acf-a730-a50ce72c10c6.json and https://artists.proofprofile.net/proofs/artist/96b1b4f9-48d3-4acf-a730-a50ce72c10c6.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 0x0a82d7cf6bc22e33b18a4cdddcb22ebe9e4d1c5445e79c5539b2928b863c3250. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/TCADF1744025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe964973b93e3b22a6639f3a51e20c5e25fe1894d5fa24f25a11652914ffe99b6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/TCADF1744033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2d23cd9cae920a2499ba863a4dcaae4d4f2d1c22eddb93994daf931b7e1257. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TCADF1744036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd829ea67ce1d1c3f70d2009543c66b21130dba53bafb2b88c5c149dd54ae1928. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/TCADF1744039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb961cf41bf151a29e6b23e35fa9d8932efdfc512f76cc9c984e073edf7566c6. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAES2027977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986abab9afd017d391b1cbf360f50fed41f4d9b8d7a5e4c92da03c4143f8de24. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAFO2132871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c827a348a57dd1557de5587114bf41f88a794622bbf773c59ecd88312d6cfb. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/TCAGH2254942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5ed3aa404c97c35b0e795b533b76ee307da8fe7cad9ceee397e1db11a76814. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TCAGM2203053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5ed3aa404c97c35b0e795b533b76ee307da8fe7cad9ceee397e1db11a76814. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/TCAGM2203053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d78718df15a950b12bd41a1f38f6b77f6981d94e43ce57dd91b88821af4baee. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TCAGE2253846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163c3f91140f4b48b7dde8a47ed9234efef69c16a5929d436780c276252d0877. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAHA2394405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c827a348a57dd1557de5587114bf41f88a794622bbf773c59ecd88312d6cfb. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAGH2254942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebcab211edaf042922fcd95fe3eb8d714b72bd107670a765f3b8fd6a2576668. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/TCAHJ2309094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf20913f0cf48ea83c4f82b8f4f904ac89a857dbc536bf7a3ba33fdac35314f. 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/TCAHH2368467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08752ba4a4932df8e8b1435b08ecdaa8192fd5baaf9d363f1ac88986dad59015. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/TCAHJ2309202.
Songs I Forgot About (Rediscovered Discarded Demos)