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 0xff651d3e78fa1bae0727504b3fda0073ef5fbc46328ccbaa3b6ec3b64ab0c88e. 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/f62361fe-d059-4abb-8c09-3a352695c61a.json and https://artists.proofprofile.net/proofs/artist/f62361fe-d059-4abb-8c09-3a352695c61a.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 0xd33c21296968f9d091fe3d895a09e3b61e07e70b9a378a75b818b6b7795728ae. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:22:16Z), 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/TCJPG1743743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345948f6a4ea2d94b310e49ebebbb1f62876d5725226162a626031a724dc83ba. 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/JPC841900501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ce30bc938ac42e56e87f9b0613879b21acf27ce296172a7b6fc5006fd3bc59. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/JPC841901101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ad5ae9a15866868ec2fd3ec50fe0f4734291cd9307e26e6616ddaebf8ab239. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPC841901501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d6214d8c7c9bda29c38544972623d5a1f1d2a0f136098e671396d541d29298. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/JPC842000202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa42226dabb7acfda63dee6f6a150b00fb6fd0d35b28067261ab087d578d984. 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/JPC842000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ce30bc938ac42e56e87f9b0613879b21acf27ce296172a7b6fc5006fd3bc59. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/JPC841901101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc823596d4f92b177303fcdc2d3f9ef457a849a35a74b0ae1e16808241491e551. 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/JPPO02003701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe015818ecc1d76db6b94b1f72c6b0fa89778a9a98bb5b564afb697c79225a281. 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/JPPO02100613.
sleep sleep - Strings Live Sessions 2021
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944b9eb5c6f881f720b87f6e561c68eff01f9a6a7dafe0c16db81915214a7f08. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/JPPO02102419.
Gaming Party Xmas (maeshima soshi Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a974a0b6f80f12f500e270586241f4c5c160a5e4bac744b54e3bd344640586. 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/JPPO02103291.
Gaming Party Xmas (ONEMAN LIVE “WAKE WE UP!!!” at EBISU LIQUIDROOM. 2022.9.16)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c8cb8299bf396960ba51ed2f0295ccb3423e56f2fdd2b3f2f97d821c999f2e. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/JPPO02300410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152227f489d52cf4c87fea5d960e5c70f8038ff398472d2928c5d4b7c2fbd30f. 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/JPPO02302178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964052c01f1a289fe6f9ecccff069f5d65feeb3b591379c890c5aff8a6cd0ddc. 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/JPPO02302478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed420dda41f7b003bfb497f79269784b613852bc36c182b5dda8ac12df57a41. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/JPPO02402964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa867fb93111e95016e9495da5b9871cba54fe38c1802e6926e81b9ff42abebfd. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/JPPO02500836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ce5e1c92f734d80fd8b5db150f89cc4bd0c47be421d076cce1969871c7fa57. 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/TCJPM2058112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d7b10d3f7f167eb7ac2b39e1c43dbc45cd6833c81bcff5b1428bb26b31a58f. 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/TCJPO2100387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99f94e0741c764df9109b7e3d01879b5378c3eee6aa9346d14a2fa0032f7840. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:25:12Z), 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/TCJPO2100397.