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 0x7c208e75caabe7a86b628a613bbd9d67f3564e12280def0eeb413962ec7fe684. 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/4520eb12-17c6-407f-ab6b-62116038aa4c.json and https://artists.proofprofile.net/proofs/artist/4520eb12-17c6-407f-ab6b-62116038aa4c.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 0x89da67b35859c7cff4e02f87179c536c60ca5edaefd407ca87bfc3337d9c90de. 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/JPT551601006.
ピアノ協奏曲 ロ短調 アレグロ・アパッショナート
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4754f82974a1f134f9eec9f8a2f4ea6f99829f1ccb1d1fe94739fd6b6b7523f. 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/JPCO02411310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a282c81a9aa8b2e91ad72607473504c6a624a9354b68ea3220758fd0732bb09. 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/JPCO02409750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3affd508d41f04b6b774d36d51de5ad341348d8549c01ef5b0488d5cb35c92de. 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/JPCO02421380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92206ad56bedbd88b40b706a2be60d162eb5e8b2d630444e6504a2c45c01925. 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/JPCO02421540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a83435769428d48ca0e60977f828f9b707585f2552df984046288fce391e30e. 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/JPCO02421570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07b70ed07fe1542185b675d0bad8ca6d7f76366e4f2b2d5aafee1ba9ec863fb. 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/JPT551900136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c0f53b7e6ce58c80224addca710374536b20e029661e274ba44183875329cf. 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/JPT551900137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057067d8221ad4d74cfeb40ff1fef6b439dee616834608733651b24e6a691915. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/JPT551900138.
La Parfum de Fleurs - ユーリ!!! on CONCERT CD
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d77494e3d86b8d30b3b60e26b32020302d3c553282f94586778758fb56dfeb. 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/JPT551900139.
The Inferno」 - 映画"上海ブレイド"より ユーリ!!! on CONCERT CD
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cff930b61575ddd3feb0948df36d41c4b1a6beeff9f21f39ba7a356f1259bb4. 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/JPT551900147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872410515afc30b020efae5e1da9569e8482e09d2686f1d472712d11053bead1. 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/JPT551900148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb7e3cd06d32d812d37f452036e3ce5a17b0f071d48ac0f81a14a1dcbb5068c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/JPT551900149.
Shall We Skate?」 - 映画"王様とスケーター"より ユーリ!!! on CONCERT CD
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ef642c36241d34336b50c41eb59f66d2d3ea606693846e19017ff8e6382747. 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/JPT551900152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383cd406f6032317f5eaab50f8daf0996695921c17b63e40c4adf78a3ab1430f. 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/JPT551900153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ef7f33b15aabc2993ec28f4910d4cd9473ca65431f61b21a66dbb5e3495c9a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/JPT551900154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996a8c5e32415c4fe9be3d80e54f04c42b99e9f7a7d50b03268c288d09d6f758. 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/JPT551900156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2757adbd3bba09e18b541c3268274d1d4ac064ac7ac0c619aaed6e385c1c62. 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/JPT551900157.
ベートーヴェン:交響曲第9番 第2楽章 「降臨」 - 建国版 ユーリ!!! on CONCERT CD
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b05c0cdaf45b2b3087836ea68d219a7e30549d5f4492e9510a30e1e2ea4669. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPT551900158.
ピアノ協奏曲 ロ短調 アレグロ・アパッショナート - ユーリ!!! on CONCERT CD
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236c2cf8a8f4758eef133d839992d43b928b87e954c0a4b2af7325badaf00cb5. 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/JPT551900159.