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 0x8e2476c88ef62c05868739528e18f20578c2c82ffd8904401488ac10980f20f0. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7058507a-a982-4377-97ad-e823bc6977eb.json and https://artists.proofprofile.net/proofs/artist/7058507a-a982-4377-97ad-e823bc6977eb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Oto No Wa: Selected Sounds of Japan 1988-2018
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 0x53dee5963ea06c235073677df028efdee99cb73b865ab6771f3725f7dcd8caad. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPZ921701567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2fe13f5911c80d278f954dc4ebd5bdfa4eb981d4e57a1b419ef72341a3804e. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/DKAZ72015002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e912cae9ec033ca182076961f5b279bacb43d748777e7377dfb1df1ea51d93. 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/DKAZ72015003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83b8ae1b34a4b28033f42937947f357513abf1a750c86a5ff291bbee0665e8e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPB609921802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76157e6c7423cd93ec9871586c41c6a0861afb2621c98488373899574558941. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DKAZ72015006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a6aa6294163b5ad266db5441ce6f9c4b0e5c83c11ba89f0f37fc3e04aa25d0. 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/JPU200700058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1143a1314f488ca6e7b805e02469ada53187cdb03b2328439ae01ce283c5942. 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/JPZ921704489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bf758d84163b2dd5545f34caf55a21b6d4deb65885d2016ac9014c9e591090. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/JPZ920602320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47246e9964390a6f7875bcfbfc16164e540dfa23b62af7164d0f309261ffdfa3. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/JPU200700047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1ca0c7eb949be46c0470f82563ca3c2a3a62deea442acf74b1cf1078b2243e. 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/JPU201800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646bb4bde98d39b6d8f5c3c900590f31631f0e96e4aab7d118f27534917d6759. 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/JPB531600458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84a064d8b176b0bd1346922a14b440b031a886af37de4599241a37ea3b12e96. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DKAZ72015013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de0ab18ca867ba9ef696020b96e9ed41fa0b4b46679a9097e0712d222377317. 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/JPB740600031.
Past And Future - Flower Records 20th Anniversary -
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba26b148f0ab64b310d56245d9804adc339f104ad312ac5a7e4d30fc96b57d2e. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/JPU202200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a7c226d81816350003b6d41b30e5b30f351cbc40cb985f9d18d929f5dd1a37. 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/JPU202200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69faf0862f663fde7250cdc45b0f05ade26c07d612567fef0f10d974f9b0bd74. 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/JPU202200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd7b6191d683ca23a7021678ea58a618b7704fb601e1e8a136c40ffd0e970b5. 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/JPU202200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680c429b57b71720779a340c7799c63f133466734c95c8f62902426be3fec389. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPU202200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54d7eeb8de2ebb405191e447d4eee27dda0f71ca0bf68173919c7662d8a09b3. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/JPU202200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a816368cab9d5cd0808f86eeb92f38746bf43fd785a196d75f7bd9f036c298. 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/JPU202200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa4fda155b3fb4bf14921a00cf2eae34faf4aa3febf1f40df1fbec60f9f9230. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPU202200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973352295c4dc282ab1b95adf71c66f261e2bdb3a2299630fdbcec789aad4063. 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/JPU202200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7085bf9aedc90294b636db9291f162d8355b0d7008c15bf2d7353aab6a72436a. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/JPU202200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772083a043b38ea5c4c142be24c509bf655914601cc21b61dc33471c04b3957b. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/JPU202200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acece5e6c87dfaa9b1f971c7a007a8b65d4530a4fb8dc07b48b787f78f2a32d. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZDA72301284.