1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5056dccdcb67093901f65d48644fa8aba85ae4e7a6e6e7e3a40b6222e75139. 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/3a7d2a06-e303-4267-9da7-db75897a3ad6.json and https://artists.proofprofile.net/proofs/artist/3a7d2a06-e303-4267-9da7-db75897a3ad6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305cf40dcdfed23bb100142c402a763e87beb6c08bc70f6cca18f2f9f02bf752. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5MqZFxSAGTKqnUbBVLlkM5.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5MqZFxSAGTKqnUbBVLlkM5.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305cf40dcdfed23bb100142c402a763e87beb6c08bc70f6cca18f2f9f02bf752. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1p24ocb4bvCRId4cquDUHl.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1p24ocb4bvCRId4cquDUHl.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b22a44ccf61a749ae928af4af0ef86cd645c91472cfc529b84fa8edffea4ce. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5J1ZyBPmRGD8uIoMw6tzvb.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5J1ZyBPmRGD8uIoMw6tzvb.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ddffea49c7c0ac8e3374242df4ea4290abe85d58bb6e99f0d1845ed150652f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3X3MJOy234znJI7iOLBaL9.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3X3MJOy234znJI7iOLBaL9.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3657cc3e34a9caf1b2b2c195d10945fee94b15123c40fd6d0fb03f5953e95ee. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1qvK4SiFWA2wKKyPF6RR32.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1qvK4SiFWA2wKKyPF6RR32.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a92f0720f3716618e8adc7ccf50cd8d5ba5ed92183b7e7049a6008ce8a51ec5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1e83LbYSYSdqwcYsuq3sA8.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1e83LbYSYSdqwcYsuq3sA8.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93af72d56b1c3eaa91fa988fb683ce14c83eae05e84da5b554e8d124aa5601b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/3LnpGgqfghEHStdPfedv76.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/3LnpGgqfghEHStdPfedv76.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480c6ae9bb3c7beb8242e2036a24ecb2d03b770ae4b3849c1c45bf23392e7c06. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5RPlOCaXlgGG4Mx9sz3nKo.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5RPlOCaXlgGG4Mx9sz3nKo.
Veranda feat. Kanano Senritsu - maeshima soshi Remix
{"copyright_id":"0x6c4e77086f3cc7c95f54002bd96576e3212299c0c5cc3b929ea7fb9fa27573fb","isrc":"JPVI02401111","name":"Impure Love Story","registered_at":"2026-06-23T11:00:05Z","spotify_id":"4KoUwbgu9nrTheDM6f5JfQ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4e77086f3cc7c95f54002bd96576e3212299c0c5cc3b929ea7fb9fa27573fb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4KoUwbgu9nrTheDM6f5JfQ.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4KoUwbgu9nrTheDM6f5JfQ.
Usodarake no nichijo no nakade (Re-Recorded ver.)
{"copyright_id":"0x87a4cedb09cfa4438bf9a3258c360895def429549d0226495a715b9c735d433f","isrc":"JPVI02400121","name":"Veranda feat. Kanano Senritsu","registered_at":"2026-06-11T14:44:16Z","spotify_id":"4AqItzmfMyiqIRrtw9S95T","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a4cedb09cfa4438bf9a3258c360895def429549d0226495a715b9c735d433f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4AqItzmfMyiqIRrtw9S95T.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4AqItzmfMyiqIRrtw9S95T.
{"copyright_id":"0x87a4cedb09cfa4438bf9a3258c360895def429549d0226495a715b9c735d433f","isrc":"JPVI02400121","name":"Veranda feat. Kanano Senritsu","registered_at":"2026-06-11T14:44:16Z","spotify_id":"4eQy3KR6AwncK3adZNJVV3","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a4cedb09cfa4438bf9a3258c360895def429549d0226495a715b9c735d433f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4eQy3KR6AwncK3adZNJVV3.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4eQy3KR6AwncK3adZNJVV3.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e58a703b70cdfeb0b62972891690ec2b9719c76de565bb403fed343ca5ac6b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/01cPDnLoiWyCl0Sj9G5xjd.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/01cPDnLoiWyCl0Sj9G5xjd.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7531f549690ff17fdc2e11c131e9429ab6632245f0ae3d7d9bdc4767b3642dd3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4wMuEM5OxTHEwBfuvQgVDb.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4wMuEM5OxTHEwBfuvQgVDb.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e29de4fab5ee2e44ce3d0af581cae78452aab3f92ad5c558927204682a3c1f8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2cg3kcWIvavYN4YajDvvco.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2cg3kcWIvavYN4YajDvvco.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb67c530ff8a801c9deb2e27a6d4e468abcbca14f2d287af2cbde5b0ea384df. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2A9dAj285m7uUgdGPSRIAM.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2A9dAj285m7uUgdGPSRIAM.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b22a44ccf61a749ae928af4af0ef86cd645c91472cfc529b84fa8edffea4ce. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2MtTAPmEoGKUC0vDloY6nw.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2MtTAPmEoGKUC0vDloY6nw.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480c6ae9bb3c7beb8242e2036a24ecb2d03b770ae4b3849c1c45bf23392e7c06. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1TBHbljkZmfH15BkKowBDK.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1TBHbljkZmfH15BkKowBDK.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a92f0720f3716618e8adc7ccf50cd8d5ba5ed92183b7e7049a6008ce8a51ec5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/23AdLPEUScszzqA51mU6wq.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/23AdLPEUScszzqA51mU6wq.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305cf40dcdfed23bb100142c402a763e87beb6c08bc70f6cca18f2f9f02bf752. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1G5cJCr6WwmiKRGlCbq6WS.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1G5cJCr6WwmiKRGlCbq6WS.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93af72d56b1c3eaa91fa988fb683ce14c83eae05e84da5b554e8d124aa5601b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/122YvdT88kNsdUAdrbxUka.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/122YvdT88kNsdUAdrbxUka.
{"copyright_id":"0xdcd93db6abaecaaad19f13a62488861f2ea89c872cd8d341926f8bea8476e996","isrc":"JPVI02101933","name":"Yuuutsu to baito","registered_at":"2026-06-27T09:41:37Z","spotify_id":"6RRBxTFtvKzvNY1c0dYugR","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd93db6abaecaaad19f13a62488861f2ea89c872cd8d341926f8bea8476e996. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6RRBxTFtvKzvNY1c0dYugR.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6RRBxTFtvKzvNY1c0dYugR.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7872c51715119df36a328961f7d316ce1a8a994bcaf225460dfcac95b74af68b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/79z5mTeZIIS1UQnFbMVJ17.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/79z5mTeZIIS1UQnFbMVJ17.
{"copyright_id":"0x37a137c12b111278e4fa85b92d2e174b11f7aefbe86d91b374399fd505f3723b","isrc":"JPVI02100791","name":"Even if the world hates me","registered_at":"2026-06-27T09:42:48Z","spotify_id":"2a2alZCw8oZlDGciBUlZvl","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a137c12b111278e4fa85b92d2e174b11f7aefbe86d91b374399fd505f3723b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2a2alZCw8oZlDGciBUlZvl.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2a2alZCw8oZlDGciBUlZvl.