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 0x595cc3fff783546a2c0c12149864748e3f879d7ba6eb28ed196b3dc21975ea19. 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/7bfb7dca-4755-4234-8fd3-b42594708f05.json and https://artists.proofprofile.net/proofs/artist/7bfb7dca-4755-4234-8fd3-b42594708f05.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 0xd354a9abf925b03e87a9f59b6641b0babddc64bdf97e22d2cc7c72f3a3387679. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/JPTO00901207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c42c24e30873a7ea564a6311af945721325b4fab687596466c2c583934eba3b. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/JPTO00901208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7c8afb96415cbacf7badb739536252ba5b406741543be2b524586751b9bdbb. 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/JPTO01200265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cb3540f11146abe0ee7d78dd18a2190f69158c28f7221b0f03b5f3edb4896f. 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/JPTO01200267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3fe9e7eb17a51289f55f3785ca4b8e63a6c89232e0e8e0cf3a79f4a6d467bb. 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/JPTO01200270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748304f11d49129d283760187c694c643cccaeaa65dec60adec5b1afa522e5af. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/JPTO01200274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7808618b6468d544009484fd656bd66ddc4b56b8ab5b7a1be8a8285743c23f98. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/JPTO01304333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c73fb6e65e2b5ce5e5b694743ac7ec49425507d05e72ca15dc1d30c58318a5. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/JPTO01304330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e68e421226d32dbac6bb01169d3d8f066217087a3798123ccf46405157d05f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCJPO2152382.
Ultimate MC's Battle (feat. UMB SPECIAL BAND, Shigekazu Otake, Tomoyasu Takeuchi, TOMOHIKO a.k.a HEAVYLOOPER & Kaneko takumi)
Ultimate MC's Battle (feat. UMB SPECIAL BAND, Shigekazu Otake, Tomoyasu Takeuchi, Tomohiko a.k.a Heavy Looper & Takumi Kaneko) [Instrumental]
Ultimate MC's Battle (feat. UMB SPECIAL BAND, 大竹重寿, 竹内朋康, TOMOHIKO a.k.a HEAVYLOOPER & 金子巧)
Ultimate MC's Battle (feat. UMB SPECIAL BAND, 大竹重寿, 竹内朋康, Tomohiko a.k.a Heavy Looper & 金子巧) [Instrumental]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8d23f10accc1760455acdb80bd52106e78a524b466f306d4f15fc06af30d1e. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCJPW2386096.
EiGAzA (feat. A VIRGIN, Johnny & SUDARENDEGEOCHERO)
EiGAzA (feat. A VIRGIN, Johnny & 簾ンデゲオチェロ)
ただいまの歌 ~ふたりぼっちで行こうver.~
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c6d96cf69dbe47bbf5d18da6c91ec4bf74c6d088dcdd43e542950a899c80f1. 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/JPVI01814551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300dd902cfb9345ef728de41393d76e08385611fe33849bbf028fba98b2508d1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPY201907482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e39946294f75c8092062845a01b93895c59eb75c85efcd011e7232f5cfe4cb3. 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/TCJPO2132743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2ba98797226d89a888a3812cefcac47ab45652179e806eee0a12ed50aa5cc6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCJPO2132746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3547f3beaa41a2d549a7bf54c30f67ba0acf983dcfa56b0df6cf847a9b578624. 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/TCJPO2132750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d8c3bc31cf65ebc5be831dbe6699a4ac0babc04d297724e87a09dc040cb81f. 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/TCJPO2132823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e968a6f0dedcbb1e80364851245a59312fe848422d6554181d76aa1c36c3413. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TCJPO2158814.
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 0x4bb239ea1e4d4352df19def59a11e0c8649a16d7b83246f85132001346eaa82f. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/TCJPO2132753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc14207f531893731e4a84482992e21bb4ec33bb841dd9d9ec64a12247b66954. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCJPO2132797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcf88542c968f91690ab0957ef43fed463b59e97c958d52ac1a76a438da4843. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCJPO2132803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63623ad1eb2f50909b73b1e20993004a8f358971bf3584e4a66d6c828d265f6a. 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/TCJPO2132833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a10b47458217328677d152b1e9db5129927b10795f050c2f2c01c8f6d3d6ee. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCJPO2132840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0e489745ec620c9b329396c54cfc396ce511bdda318b7e7ccc653de2da5e7a. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCJPO2132844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2fa10bc53b83a482fa5e390cc0e4408bf1dd5cfcbbf132aa89512f6d677a70. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCJPO2132862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04ae72d15506d3d6e4cc8c07230756fcbfb9bdccab989180b8cd769f3c4a963. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCJPY2311769.