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 0xb7d8164c272b2232e6a31d4ccb7f61e8874815fc4d77237bcea450722adc85e6. 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/b7f033a4-de3e-4fb4-8034-0171fe2e364a.json and https://artists.proofprofile.net/proofs/artist/b7f033a4-de3e-4fb4-8034-0171fe2e364a.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 0x69607e930bf77fef34508b8e7b982531ae565a4973af10f1531293a76943e9b6. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JPA962300193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b74110d4b89ecd9ef75905ca683eee5c791c8f8b773fba232a9f57e02bbd778. 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/JPA962300195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd4671e9fb17294347f28fd5f805a860b514ee4ee6b69a788997acb83e93207. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/JPA962300194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2f69cc107cab1d94696e25d3089bfc4c06ff6aa34f6f5bf39c66f9f107c4fe. 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/JPA962100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee7c81da5006500047334db41730140f6613317e8595aacb22b85d362c4a4fe. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPR232401523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68acd8b35b0e46e840103cfabd1618421c239c94174f1b5cdd39f8857a4e0111. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPA962400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ddd94dea82ada4b477a8d2f236fc6dba769e6703e1d7e3253b26a517251723. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/JPA962200147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11120cb74506ce5c66010d34c1c7d38c37a384b7413b6ffbe11edf2bb0bc08af. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/JPA962100158.
Bright baby - From TV Tokyo's "synapusyu" January 2024 "Tsukiuta"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb13b7724e1e32161bfe9456315cc94321ab2e4c529722444bcff9034deca009. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/JPR232301315.
"Funny" and "Funky" - From TV Tokyo's "synapusyu" February 2024 "Tsukiuta"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e8dc1e3f20f0ec5e8f0c88205c78c138ee524e231def705336c7a20a207ee0. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/JPR232401316.
You are "norinori" - From TV Tokyo's "synapusyu" March 2024 "Tsukiuta"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb347e80b8f829cdb2e911f6c16dd1470db8b82a29c1cadfebdba8aa2d00b7aa4. 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/JPR232401317.
mokemon - From TV Tokyo's "synapusyu" April 2024 "Tsukiuta"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71852a04a9a1b16ade1dce2114253300d804e62d06cbdb0302301519679d5f89. 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/JPR232401515.
Drive - From TV Tokyo's "synapusyu" May 2024 "Tsukiuta"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c80686c8906bd38822902af1f6943d45afb9b10d7e294b14deb470a5e41977. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPR232401518.
Dancing on a rainy day - From TV Tokyo's "synapusyu" June 2024 "Tsukiuta"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd873d7f7dca98da2ece266535c5516d6b2381f08bf99d13e4c3ad1a3dfe29f24. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/JPR232401516.
Oh Ya Oh Ya - From TV Tokyo's "synapusyu" July 2024 "Tsukiuta"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe994610eb34df46fd44ac167250f70f846c6d6571add976d784de9a6cd53f24a. 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/JPR232401521.
Sunny Sun-San - From TV Tokyo's "synapusyu" August 2024 "Tsukiuta"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5738294c5b20bd35d78e851315705d9bbf11a75cdeffa3ac65415ca4edb7c75. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/JPR232401524.
Moon Rabbit - From TV Tokyo's "synapusyu" September 2024 "Tsukiuta"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886783c75a11c13dc1233dc6fae9ec29b497453dd256074145e5a7d565bdb176. 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/JPR232401525.
Sparkle - From TV Tokyo's "synapusyu" October 2024 "Tsukiuta"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1f9051a8ce11d164b767924182c28e5dcb3ed22d74237494ead091fb426792. 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/JPR232401526.
Ai! - From TV Tokyo's "synapusyu" December 2024 "Tsukiuta"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c608d48942bb6d2d70fb229b607336e9068fb65d11aec0e022d96b2e6204142. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPR232401527.