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 0x8a7223fff0a3c7691c260243abdba221318b04cbb6550a4ee6e587bd5404bd93. 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/e7ff9ba8-8c22-4df4-9400-864f6135060a.json and https://artists.proofprofile.net/proofs/artist/e7ff9ba8-8c22-4df4-9400-864f6135060a.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 0xc9ac3d693681319a208fb7f81462356d6a9701e26dd0f319c5dd3ac7b0f80542. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/JPB601884837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca04aab9707f5c541a9da82c5c3744f554f3e0fcbce8e566120fa78ae58c8005. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/TCJPK2083474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5800bfdaa6b3fcba6522d7ee30f0dc1f41f44f71afd71a05d91757987256e34a. 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/TCJPM2012786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa016ca18fe3c6b3febe033e77179f565ae69c9d9879c6bd2ebc7decdd4b1a116. 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/TCJPO2153778.
Never Drink in front of Shimokitazawa station
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b60fa400cf49dbe58d78a8ee06db9823d15191c72273d76856b1ca3d986956. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JP92N2368748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa9f3798398c2cfd24073ddce032535aa88970b8e7b26dfa35bc75c1d928a10. 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/JP92N2368750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044a326749114c7b3360c4861b0ff9238be2100c9974c53cf6249c22bef05886. 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/JP92N2368752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40466c6384d38da3a5922d09c0cdbbca5c4934e7869d2cc65394e628fcff8f6. 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/JP92N2368753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafd9cc39c15ba9341895593e0c61ccb6ac440d835f3a9c5aac85a5d382c0459. 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/JP92N2368758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360e65c1bce78bb0adaa6de181bd11887bd0b04b739b00a25df08d5fdab77eec. 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/TCJPE2557865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e0819583cc6d1c5681284dd22a7ff01d1aaebbccc6db170bf037e47106b4b9. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/TCJPH2576899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0d81981e5647fb5b8750f949cda931aa70f34cec0864c1a60754a7cd529b5f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCJPL2561617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32af3e8e73bbd81a243d96b76d793373aa159e7b9601f6669731f2fb7a00b59b. 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/TCJPL2561660.
PLANET TOKYO (feat. ZIW, NSK, HALELU, Akusa, Ole, Chapapa & okkaaa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x495cb2b1c8b85a2bdc1e4fa7d15ad9f03c896c4d4d34c5b770124a38e17a90d0. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCJPK2076530.