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 0x50c773a78fd85fd402eac9ee3ed29b8b2d367924a1c10b4d044c1aae301d6ef3. 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/b08f615f-b8a7-4e77-8c15-1d896ba46d56.json and https://artists.proofprofile.net/proofs/artist/b08f615f-b8a7-4e77-8c15-1d896ba46d56.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 0x19c572e37b002f0b9b38e399e49e77e376101d3fa42b82ca903258f747c832ab. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USQY51776288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13dde90e56da0d48d31581eecf467c6b061717b12974a389536ca6f79fc07057. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USQY51776289.
一緒に私たちは、市内の遺跡を歩く
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5395977e2cabb2acc45a9b9e4e1019593547092f18a1187b262503a7965d5678. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USQY51776290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb351d1d75346589f7926158ff368da4d823e68b58e2269edde41c05ee412bd5. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USQY51776292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb946e1d12a81afebd68227ce7316834dfe39191b865b3bb7c85e7e456e8e01a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USQY51776293.
私たちは、ハイパーマーケットをさまよう
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b08b9dc9e0dc4fe7275c2be225702c353d099322dce69ceea2092174705cc0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USQY51776294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4c37821bc865a9413279b094c9c7f3adcfbbd7c7ca4500c7ebf9a7e32ca4b2. Chain 2 (Bitcoin): anchored in block 957720 (2026-07-12T15:26:09Z), 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/USA2P1669041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c2d69e61eae1e7d1a8d384928d93c3ba57f9656411cc7f11c16158541b9929. Chain 2 (Bitcoin): anchored in block 957711 (2026-07-12T13:56:57Z), 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/USA2P1669042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dba25146746ba9d759281cd7c639c7164101b75ca90e4aeb54625295f96534b. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/GB5P51700286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69de0bebca2f18c70ee37477dce7f05f150682bf60abfaed9d805018d393b9c7. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/GB5P51700287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d678a66d3d31a97dabb2fa06a2d06ba8700b8d49c55ca3b23d69bd16f0d1bf. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USA2P1932285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475220abb1e0d3f3329bf6a28f1f6f1e97edc87dea67621c37d2d50f97a310c6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USA2P1932287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3055bd57dc0815e6fe2f19908247a70d3e3c1843f92bf6b76d9799e70149bc40. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USA2P1932288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9540b48c10623b94816e27c82fb12fb4f605b21b956c55ce75f4635edf8703. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USA2P1932289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48635b298e082a3fef0366967c4dd1ab946dc14cfc60f1640da82377ae40795. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USA2P1932291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00077183a77e8948d9ede3effbeb9277cd2074fe5864ca21c706fd2f71cffcb4. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USA2P1932292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369b4cc636dda8812631a03950a12a6cfd15096609392eaf802456a203e632b8. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USA2P2032400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58adb02bb456c2fbe54e80380bb2abaa50fe9aa99c780cd9ba79fa310640d6f3. 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/USA2P2032401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8f6931bf0cbd03b37c2503db8e086ff684e02be8a44e21ea11e8379fc3c0a6. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USA2P2038793.