thumb|Sopwith Triplane in flight (2014) A triplane is a fixed-wing aircraft equipped with three vertically stacked wing planes. Tailplanes and canard foreplanes are not normally included in this count
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 0x3c819a3d1fa63802e29e26a61963e050b784804ceab3e0ad906da5011205aa07. 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/676be748-142c-4c11-84ba-16f4070e48d3.json and https://artists.proofprofile.net/proofs/artist/676be748-142c-4c11-84ba-16f4070e48d3.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 0xb6c46a2a159a4306c0c1a22ba0588968654c6e9e2061ed719d92ba388815a6c5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPB600571801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee49ec1751a94d45de97b61979dea66e4e8151d4f1ba153536dca6a532f3d3e3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPB600756801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92657c03f5a1f16a2cd7009cb4f31336d9df0d5c428a19d4480e55ceda378b71. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPB600913501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9579794ab3f4838ffeee3aab3427e2bd7bd180fb6f34e27e9c03f5f1e1ad9fad. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/JPB601005801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920e215e77c502a75319724622f862143665247659a768de5692844e96a8aa1e. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/JPB600973601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f70487dc2bfec608e9203000d023cc2664a21603857c96a795c8c44d18830da. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/JPB601229201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5be1a4eb3bce19bcb41332579926c0e7ed2e1d78a4b23b6f253f644d8c77e9. 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/JPB601302237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd8395749f7f02766b3732b0d4f5906df3c8e7f18ba19c49720eebbd661d249. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/JPB601303817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5be1a4eb3bce19bcb41332579926c0e7ed2e1d78a4b23b6f253f644d8c77e9. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/JPB601302237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85649b7a568ac4621b9f431003f991ab08de05dabdcb97302f620fa7a7715c9. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/JPP972100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48300b933e93df8a3f5c9d8920f2eed5dee342dd39c188ef7d02283351fa70a9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPZ922213317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7d5b5bf6af6a8f7c09f232de59d70451bad222bc6ef375acdd35071bf282ee. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPY832400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a855df6473e077f632d4764690d40d70877ea0c3f08250be63111855c738c05. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPY832400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560c46ce37b5e6d41fe30031e130888131eb3076d9b336c4e93df3a331fb4c2f. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TCJPA2422397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7b5bc5dd4079a009c0fdb367595dcc8f22a6be46388d0ced9a06359af4d2b3. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/JPZ442400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0472dad96f6543650065851817ed7d8c0472849a8d0592bce883a09e0fcd0d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPZ442400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560c46ce37b5e6d41fe30031e130888131eb3076d9b336c4e93df3a331fb4c2f. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/TCJPA2422397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7b5bc5dd4079a009c0fdb367595dcc8f22a6be46388d0ced9a06359af4d2b3. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/JPZ442400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef1f10e7a3b0c06fe86520faf3fbd931e5fce9a4879994992acd1424fed2d17. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCJPA2486818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305c59d6a7e4d04df3a614ea82da9f78db0b0fc83e4d8d8c4fd4e73ba3491bb2. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/JPZ442400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07ec0620420b5db49b6b4c10a892b0ba57e2a838d5110c8ea4b6fccba457dd5. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/JPZ442400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b01eeeeef06dd6738711258e8623db9c8e7042c319f98567667921b39233c2. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPZ442400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb5988808d062383085456610fceea3a1b82abb7d4662e6cd2adea9b8e58fa9. 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/JPZ442400015.