thumbnail|Tokotoko in Te Papa, Museum of New Zealand. A tokotoko is a traditional Māori carved ceremonial walking stick. On a marae it is a symbol of authority and status for the speaker holding it.
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 0x9cdf9e7d9bfd96d29e045380b0ae65e48b5709044c11ac6e23089c2a7e03db14. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c717b9bb-a335-4423-8e2f-eab0df53b456.json and https://artists.proofprofile.net/proofs/artist/c717b9bb-a335-4423-8e2f-eab0df53b456.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 0xfa393edaa578b911fd8ba5ece1b90b52e9bf2e987a4e8e3755d99b128c05ee63. 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/JPE560901313.
ポケットサイズ・ドキュメンタリ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a02e46b68b566dc62f51e396600016dfc4e9d984c6d87e563214dee6d3d5eb. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:25:40Z), 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/JPA651402869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff1eb2b8d1920643869854e4a3583db001c827ed610e4785a6cb7b2552b4c04. 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/JPA651402870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6465b062c50b0981472aba4a999ba438e9f43d1875ca0cc3827348f3feab224a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:11:24Z), 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/JPA651302661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84207618f2012fe47123d53966f73ac9725bb6e4e7209400b00dc2f8cf45ba8d. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:40:49Z), 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/JPA651402871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8b9b04c270c79bb34ea44ee0f3a096f1cca3131ba9dddb2bbb732fcee1f8ab. 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/JPA651302322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24a4d50a8b632daa9f2ef2abc8c5d985f97e27f769cfba57b4ceb632aa837ee. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPA651603623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb182e65c8687d73b3253ad1eea09c497a7286fa09de5d90fe2e2a76dab0f0b8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/JPA651603625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4744e89f7adfaf82f07ed01f661e44b810a7033b3c0dbbed3c7c07c7e492b10a. 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/JPA651603626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf4f94b9f393da78fb109992565c52fd3bb4e2193698f82a0738f0a5ff7c8c6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPA651603628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5e54c84f6706aa9e672e25328cd04332ba74d75ca942d136bbda1c4a5d0018. 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/JPA651603629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72e4fa9f385d1df0d245749f7f78248b8ed9a37db022e3f8f83db45187c20ce. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/JPA651804333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1c7bccd0a68fbc82a0c09068def5bc32c808e34a60414d9f10f49f538dd035. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/JPA651201925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542668a937b0745c9f7c83adac9eea65fbc246d864aad3c5af121230c9e554e7. 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/JPA651603555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e97ef1967991292fc125b5c9dfac37f0958d2d5c9c6a26c5e74362a9252271. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/JPA651804334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58649c9ec31cf15870b7fd24716283311acd87d7b666ab72c4673e3154658ced. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:06:00Z), 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/JPA651804210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6892b8d868436679446b027227f584aedac98a895574596d0d57fa3ba17e46b. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:04:53Z), 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/JPA651804335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2beea0bf31ae2bfa704e1a0b6368b12bbd961c0de496fb68c1c66d62c96c5546. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/JPA651804336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a77c9d4781e5bafd595bad758adf08b6e0c75f25c3ce65a1d2a83a3e8b35435. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/JPA651703681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6c5f4ac2cb60d52af9f24794a92d1dd161d92833c98ad6804f16cdb26ddbd9. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/JPA651703774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1319f442243840ad0e5ca15b2992db82306e2d66c0a94fdd873620c5667fba4f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/JPA651904818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802769c401d90e83f609856472be835fc6c3082590f6399b4d6edcb5ef050adc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/JPA651703924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ac003fcd2b6b5f0ecc9673866af874457fe5f669a03309ea8e1a94b6dca863. 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/JPA651804424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a91ced941126f4ec031711a489e58233be6f441e20d42bf8d4e5d3959a3aa4. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:27:52Z), 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/JPA651703680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a30c1fda7006edafa53707928ca1ac189f01584c9ac8ae01652bfc97e47fba. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/JPA652105315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bcc27c6e4c08ccdc6270a39170191e09b4b11f63cbb664b45d7f57d824ea99. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPA651904744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b73dd77f75c34810c5bcb349fc1edf6003863bd97f33014b53b885f7034f6c. 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/JPA652105317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986b07d93e55500ec0a0cee210fc874367d6c925de1b052f5865dff4b56d90ec. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:12:43Z), 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/JPA652307136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247027ac335a6dd698d0e4cb757aa0344bc31a3881f21c3503fa10c0d3fa504f. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:37:38Z), 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/JPA652307137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85a4534f8dc5e88788b30b6c321b7c45cf411585c9d8de22aaab8fa6a918bc4. 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/JPA652105660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5dd363a5bad02366e5079faf88da840f59cda09f21a0ccc2279d515f75fdd9. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/JPA652307139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9100964e80ad0de8d837f533dba152f8f43077cd39f311be6e1edcad2c58af. 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/JPA652307140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d394cce3703da0a950d593d0cb9b2028189ff4892d1e5ec176c953689be5108. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/JP92Q2400250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1c5308d9783236d5422657fb480efe8feb219f5bba3b9ba13718150f72af21. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/JPR502407645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3be2c6c0989524bf70f067beb7c9e7d46be32a6c8d56cfeeef1cc07246f3bce. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:18:16Z), 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/JP92Q2401294.
Zettai Tokimeki Delivery (feat. Ayaponzu)
CHUNITHM ALL JUSTICE COLLECTION episode III 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6346d9e6f545cbf64072884e495075525f65bb6bb0848ce28f3d9e24c9ed259. 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/TCJPA2487993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7cf2fd7f51c41f5baf6aaacb8e0085a68f055b2f415d104ed8f935de9d9e92. 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/JPC232200031.
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 0x5ee7b32d4e5c1681b3f5ddf93917e65c7d706956b09e564e7eb6e34779a8d255. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/JPY392200406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd6c0b9fa8e852e093fd05e2370dc81c031cfeedb6a3f0792b5ce7881d99fbb. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPA652400011.