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 0x17d7165970140911daebd02e04866eddfce66e1bf275267390fb51f1a341234f. 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/ad6f79f4-cc5e-4f17-a116-0a5b4fe33d45.json and https://artists.proofprofile.net/proofs/artist/ad6f79f4-cc5e-4f17-a116-0a5b4fe33d45.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 0xc2552f891095d7bcfefc4d2cab4c247b681a4ff0dde0bba8b80cdb276bfba877. 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/GBKQU1945977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad28a408117715851237f9f7e529ef3b71519f1f9ff2073621650c1076eade6c. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/GBKQU1949949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75901ce0a39dc8a2f24a92615df4054f9dc3e1dbcb53db632504714e042e6023. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/GBKQU1949950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958a4d5242f65027215fd3299f96c6fdecaac612e5c43873b7b8af2b2b17924c. 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/TCJPO2170283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e97cc20285123677a9be3d08fd2efd4adbb017cb93390cfc032c2da15d69da4. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCJPQ2124943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb459427ce740411616b65f52b168f5d43f19c05c62c024ae24fab29f4078963. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCJPQ2124958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e0833023c619df899bea498f9472277e65dc813ed7e1e6eb891de81d063022. 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/TCJPQ2124948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd1cdaeee4eed345ed6294f0cf288ba4f165f8dc7d6901bf33a5a311c155d57. 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/TCJPQ2124961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07b95d85b45e98fb6fa482b1347c5c9a61e13d9093842e55237349e3f3be2ab. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCJPQ2124965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3ffb9f3b27fbb7f1a3dc9ce361889511ea4cd418a9c603f28b914e236b44d2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBKQU2239422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab1411fe0840eecb597b9e29115a25236dc53e1a79f4860c579e62c2a6301b8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GBKQU2239423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6c856cfd7972a442d72a427f3701b84a0610719616f42bf2d5a301e566a374. 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/TCJPT2258455.
D-D-Dice and Tanchiky's Merry Christmas Song 2022
打打だいずとTanchikyのメリークリスマスソング2022
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd906bfa026e93f847d45f1d4dc553394ae23c0bc2a47f629b4c667b48c9183b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCJPW2367094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd906bfa026e93f847d45f1d4dc553394ae23c0bc2a47f629b4c667b48c9183b. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/TCJPW2367094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67721f903f2f1d0c98ae5e94a5ee590be8b7c6e9418a5d30dfe751f040e2fd77. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCJPX2368985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67721f903f2f1d0c98ae5e94a5ee590be8b7c6e9418a5d30dfe751f040e2fd77. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TCJPX2368985.
打打だいずとTanchikyのメリークリスマスソング2023
D-D-Dice and Tanchiky's Merry Christmas Song 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b93ebceb9faf794558e7531b629d3f31db36a24131c3a7d6ae6f4f1d6b571b. 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/TCJPZ2491625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b93ebceb9faf794558e7531b629d3f31db36a24131c3a7d6ae6f4f1d6b571b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCJPZ2491625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b93ebceb9faf794558e7531b629d3f31db36a24131c3a7d6ae6f4f1d6b571b. 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/TCJPZ2491625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b23016b3b0606435bf05350f58d517a000267c18b7673d8c81e2e2ca59d6677. 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/TCJPC2429429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b23016b3b0606435bf05350f58d517a000267c18b7673d8c81e2e2ca59d6677. 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/TCJPC2429429.
QUATTUORUX THE MOVIE -Original Soundtrack-
QUATTUORUX - Extended Rebirth for Destruction
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc1ffa0b09ee73988fa0376f161f8207a0c727d5214ed661d3f28ff085ec262. 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/TCJPC2460027.
劇場版QUATTUORUX -オリジナルサウンドトラック-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc1ffa0b09ee73988fa0376f161f8207a0c727d5214ed661d3f28ff085ec262. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCJPC2460027.
D-D-Dice and Tanchiky's Merry Christmas Song 2024
打打だいずとTanchikyのメリークリスマスソング2024
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf27c2ef8acb8b5db0fbc5b7e5098859efc51bb02c3dfba2c485913b6a65acdb. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/JPR502511653.
パステル・ドレスアップ (feat. 初音ミク&小春六花)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a97f7cb93a7541c65b83e85a06ea3a859f66a16a9786e19de615f74b4faa6d6. 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/JP92Q2301783.