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 0x3fe6c7dd7d44235bf92e5297dc9d75980a7baba2f21a82c1a541f9d4e025defa. 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/ac58597c-e4fc-47bd-a152-e25aee796a33.json and https://artists.proofprofile.net/proofs/artist/ac58597c-e4fc-47bd-a152-e25aee796a33.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 0x88ab46f81732330b47c2c118a3aa82e2ab0cdb0afe2d7a2ca5a6758a85e225cc. 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/TCJPH1834670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b010084a332131403bc64c7b9272fac102b6add6b05b3591c30667cab75f0ca. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T17:00:11Z), 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/TCJPH1834673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4052f554df7d001974d939a132f01cb5af635cbe98091c548fc3b02c8675c11. 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/TCJPK2081491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbf3ea02c75e2f2a03f94b206436d6012254baa5c2c9e15590b99dcfff2e5a1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CAENV2054408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7b2be0e6856fd8f2ba448167f35a73e54c82b992e70a8f4da65c589f9690cd. 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/TCJPQ2135004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a887a89dcc7b7335a5d05a9b739d6f33ca5426a8a6ff5d4856b24955847cdc. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/TCJPQ2135039.
RE:INCARNATED DRAGNER (feat. 小寺可南子) [Long Version]
RE:INCARNATED DRAGNER (feat. Kanako Kotera) [Long Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683657b355b9f6567546ecf012cf19d4166195ae44577ca0d77f5267f26b559a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCJPD2534785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181645c42993f87fbd6e56c11692e214ed7fd2afbe8c1817aae04aca0f438d26. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TCJPG2555247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181645c42993f87fbd6e56c11692e214ed7fd2afbe8c1817aae04aca0f438d26. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPG2555247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6343909cd40b21f8339356d07e0bb96cce8267ef2986884c347a0e8583ab6e5e. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:38:40Z), 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/TCJPG2558428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f5958bf0d6778dab42662f3fa11ab5a42d7a7fe1f7941a9b09ef7b9b3d6a97. 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/TCJPG2558657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956c246a08ec0b88e03603299dbf9c376f15dc1f3935818d6111f424d5fdbcb5. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/TCJPG2558665.
Cerberus (feat. Sakura Yoshida, Muratatam & Ikejirike)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1499cfaefb1f3b49991baefc5c529d49fb18e82849879b5a6ade3837ef4155d3. 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/TCJPG2558667.
Astroblade Symphony (feat. Masahiro "Godspeed" Aoki)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04046e258530bfe3a27e11a970ae69dd609638f0b54c42411f0df61bde0e9d4b. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCJPG2558824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ada9cda9c1590ea9fff16a67fee6ccebc1254a16f9b0a5594c7c3310372392. 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/TCJPG2558850.
Prayer -片割星- (feat. Isla・la♩) [Long Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cd7d0fd2fd8856c2fb934bca268077e38edf748aa8f3079493719b28418a8c. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/TCJPJ2538720.
Prayer -Katawareboshi- (feat. Isla·la) [Long Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cd7d0fd2fd8856c2fb934bca268077e38edf748aa8f3079493719b28418a8c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPJ2538720.
Arcaea Sound Collection: Memories of Myth
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f035fa79b7c97038a5f70a2046d6a1ec55e61ac2d576dc229144086aa7faf5e. 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/TCAHI2357298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621b41c54620c53fa4d49bf85e2355eca5e7f206ee36ade19a07652d4cb36012. 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/TCJPZ2413600.