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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12aeb7402f76047e33e39326106fd303513f89039cbdd8d328c67f7e2de3b270. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6333a5e6-c05c-4b7b-bf5d-81652bfe7fbe.json and https://artists.proofprofile.net/proofs/artist/6333a5e6-c05c-4b7b-bf5d-81652bfe7fbe.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfedecc634966f81621c821597b4721b9a45bf150d3c1a8567006c91fdf83ef. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPU901402349.
七色シンフォニー -TV Size-(アニメ「四月は君の嘘」オープニング・テーマ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca8cd0c6a9f417934ff357a743f23da96558468e1674401744a312614007105. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:31:03Z), 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/JPU901602540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324fddbd8ef42e307d0a735923bb172bcf1851073eb51b0d3e43acb104913f9f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/JPU901600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebba5f63e0ad031434a799cd1a494f6611193d281c06c197d864e8800f3d9a6. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/JPU901800833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d8ccb51bdfb13df1e50347115927fa753efe10661a37a6a8c3d2f941f9a3c2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JPU901804392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c00b2e31e11d066ae9a72fbc7727e1a9a34a2b2364e7b3a21633362fef7489. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPU901901380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5d34e42459be0ff6e1db38584801b6669412945d351f9d8f52adf66e4dee2f. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/JPU901901378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aef04f08ec37666b9a9e76cde5ef45c9f799ca5439a0554265a23a741e6217a. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/JPU902002314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782137689bb85d9ad055f346961071e92435aa7a76bbe7ca27aee797fb97058a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/JPU902105046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe598139fb8bf19e50e144b67163f49c26460e6a219a8d139e13eab2b32a065e8. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/JPU902200156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9da4a149fbc442447ad0212aa20b8a75465449684dc05306b0ffc972a9c184. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/JPU902003412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d8ccb51bdfb13df1e50347115927fa753efe10661a37a6a8c3d2f941f9a3c2. 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/JPU901804392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cce3803a5a99c93e848ed06eb37d1f18c10944f11150a2baea0ae0151486fb. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/JPU902000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c79420ff4c0803c77aef0c1b7a6b089d83c144e56ef765d2fa114c6ef9c7021. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/TCJPD2592753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeffb11fe8403169bc2f1c60ebbc48015b878cf4a2b8fbcfb39040f4e14ba068. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT66K2551718.