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 0xc07f0410f2ffc48620ad6667f11b54a2b67947f3442b6604fb0d6fbe68cc29ca. 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/f1f38ac5-a105-4bbf-a5af-5766399c9c1f.json and https://artists.proofprofile.net/proofs/artist/f1f38ac5-a105-4bbf-a5af-5766399c9c1f.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 0xe6fbe209d90b0f825e0322734dc57fd8db4ffd5c404bd11bbeae1e9026f73b7e. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/JPX562200475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a444f4b24fe23c081a3961a5f998b8731280c5172db9b3cf14f9ba83d1afe97. 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/JPX562200480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc1ea8909f1d101b0a0162f695ed15d7e838ab634e4887eb0f148b9af26003b. 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/JPX562200473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd2370d55a2c021be04e3291127ec56fb8f49c2262b682c394675f1e31cd9c5. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/JPX562200497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc2c6ec45b0346d05ed51f90e01e3df27a69d95e71f93c381d44e4706a6ed47. 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/JPA652206137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc2c6ec45b0346d05ed51f90e01e3df27a69d95e71f93c381d44e4706a6ed47. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPA652206137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcb6808cc4f121b2dcbda522f283db5df097b23b3b2c9c8a3d3c1252db88c53. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/JPA652306583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcb6808cc4f121b2dcbda522f283db5df097b23b3b2c9c8a3d3c1252db88c53. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/JPA652306583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66295b47975fc9b95b042237817696a00267a7f7d9f141bdb1101c8a2288014. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/JPA652308187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66295b47975fc9b95b042237817696a00267a7f7d9f141bdb1101c8a2288014. 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/JPA652308187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384a5110ee361df9c336b31ad893a17647ef3777141084ad7d80bcf7c9a70acb. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:40:02Z), 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/JP92U2400789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384a5110ee361df9c336b31ad893a17647ef3777141084ad7d80bcf7c9a70acb. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/JP92U2400789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818ebbaf733c881a38ec681fc4d6b4186df932fd100e623c75262267ed57995c. 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/JP92Q2302058.
VOCAMIX -VocaTECH & EDM Selection (Mixed by Shu) [DJ MIX]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fef373b1a5c7b814ccbd4e9c9290ac1a4f811597eb0d3aef4d4a48506c2de6. 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/JPS532400751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6ca221d5dba215ac836b4de0aaeea7a9170497e72efa28d7f14250b2493cfa. 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/JPS532400764.
レペゼン=インターネッツ！ (feat. 巡音ルカ&重音テト)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf354948b6dfff5312579528e205203012a5993936821ff83459c8a80a2f0df. 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/JP92Q2502314.