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 0x77981d1306e618e4854878ad5bc7b477dffbd0174d34666f1a4f195815f523d9. 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/d48f7266-cebb-4e6a-a857-56692c13db77.json and https://artists.proofprofile.net/proofs/artist/d48f7266-cebb-4e6a-a857-56692c13db77.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 0x073b4b04d7138173997d5793dcb36a949168288d452b4a6f3888ce7692b14e87. 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/JPV752307374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cacb1be4c19549b5e7720e1fda570c722937cc46f18a5000f2e1c1a9dea31e. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/JPV752307375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd723be76b54cc584b76fbf7542572fb3dec48fd47dde3694c1a6089f1613432. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPPO02304210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd365dea7bd16495c430a092cefbd08f6a346199e17c3ebdb697bdc937e44aae2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPPO02304182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc46d0f07c1d229d24fb7faa02f2a5b72e28df110408bac7b2c92f1e0b0398b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPV752104676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d2a5037cc583e029e7a3146d110d831f67b96502d6be11e7df17e3d67017f1. 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/JPV752104677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3dfa9e25435287eb127b7071d87795e86b5f3e0b611af6d268d21d944cebe8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPV752104678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899436205bb34edd4fb25c3299742916a0f22dfbb2fcc0e6aee5978ed8663847. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPV752104679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb3f4acc43fb6d4c00d15364dc6a5c3561bab38518d5073f569713880621fa2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPV752104680.
けーきりろん feat. 六科なじむ (CV: 日高里菜) - Album ver.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27997d7ca5d02a14392faf8d126b77e76adfbbd86ee4a5db5d8dab3cfe99da73. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPV752104690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaaefec2023824a5b65cc1ed8bae6a86cf5f389fcf269cfd705a41218bbd74ab. 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/JPV752104681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf299845b81b206ad8bcfa13366a1fcb59e284afcbe6a6065ee728824d37b8730. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPV752104682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef225ff75266224bd4367772415414cdc4d5dcf62327fda75499a1490620bfa. 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/JPV752104683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe37b02997b6e985970fae7bca0832747f8e3e31a3d99dec6837d5ca7b19d4d0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPV752104687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7efbb9fa40f95f8639a86ac65aef5f9933afc4ca8e99b73633ea0b1b6147ca. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/JPV752104684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b9728c6384d7c0f5114037d045a4199113796bac988387d49cdea6ba6e6be1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPV752104688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4752cccf30e67472807b3693855b58284dd9f7d17731a22532c4b07c2bc4381. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/JPV752104685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0bc93081b773c62a8604c6ff8e53e56fcbcfc75bdf93e87688ebd6e8beb741. 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/JPV752105267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af17e66a23133a6406ff101031b288f385a303a6d98c1cc602c017d758eeef2. 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/JPX562300572.