Kudo or KUDO may refer to: KOAN (AM), a radio station (1080 AM) in Anchorage, Alaska, United States, which held the call sign KUDO from 2002 to 2013 Kūdō, a martial art and a combat sport, also cal
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 0x698bff4a645ae4a23bf0bf32bb22c35192963ecec04ca5a89724f9d24dba0c52. 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/9f2ccb0e-9985-4c34-9594-ff6881e3b6d2.json and https://artists.proofprofile.net/proofs/artist/9f2ccb0e-9985-4c34-9594-ff6881e3b6d2.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 0x8e1d7cbaa0ee91e040bc804c9fbfa72cd56db924cb64e509f70316806deb02bf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEZ2079361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883b33a34748095a25a73b7d7b4125ef3a9aacc4ff2b3dded9cdbdc180558b5b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEZ2079363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cae3a0ab0d121481c3d902b5bbf1cd84663b2f574088fd9904ab8579b9aa108. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEZ2079365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087efc760a6d8fc5c60a7cfe77c529cf6f99c375ef749c0ff7f6d4b54d505369. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEZ2079367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5797c7e6773e7214f31a2860f4761b7255dcabe1d0e46d23a0f75b677f6f08b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEZ2079369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec0d5316648273cba08ad1a1b8d03f8fbffadcbeaa05af59ca1344ff938aaa4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEZ2079370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68b3510c0cb20de549ee518e7aad625ff0bf1360bcdcbc0ca8deaf5995114dd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEZ2079371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31f928a8adf950f2d2f1e6ece15d0f9d3517746975cc0071c36fc3a736155c1. 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/TCAEZ2079373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf750fe6362e1ae60e9e1338181d3b573171bbdb24a520a56173c0527a030a5db. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEZ2079377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2d62e5aac65d91fc854b8bc52ed3de26c75f150aacc1ab655bb4d45e35cd2c. 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/USLZJ1712756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3068857d979a7be97e1e4289c2254098b48d376c74fc0bd66bd7eb6b2caf520a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USLZJ1712758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59820bd6992c3a638a2ac6623c022c55864b6b29cd90f44d692c1c63ea650e1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USLZJ1712759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54d79caeb87375035f50f68b9a04309861d9d59d94db6e69042a80ded9ec97a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USLZJ1712757.
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 0x175b285e8a659bb7ad70e82f932e00a05a814ac36cf1534725e9ec6c37f8ef32. 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/GBKQU2148362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480efbdaffa5229ea4406e5534e9a273d1e3d38cd6e29c371fb6867e2b8b2e7f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2148363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5448893c1a221ac3ea1ca02688ca6e4600cbbc7ec64bee65475cb75f9032ee5a. 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/GBKQU2148364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b55acd6f4a36d0328878451b51ad99635f43fe30dfb8eb99674835ca1d78075. 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/GBKQU2148365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d04f94a5b2914c78204670ff2ee85b38889e8a7fedababe1acb9817bab9786. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2148366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec42cc4e2ee0299c6c84260340b4e395eaabd049b9bb0f5e72694b61c0ef44bc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2148367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354ebce1d1edda5d6ab2028b92f7f2d85d1845f3bd9f685e42595d07adc8c379. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLX9G2100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e6a4528cc9278160292058558f0110936d0551d32537e7834d5326b5a18471. 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/NLX9G2100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0000a85d2de9d28c2a0a71d974ee2c156a9fd5961ef111ef0578c1d03b5366d4. 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/QZFZ61994922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42997a6f07bceeddf8d82ab976f0df3e01701934af8b0cd0663987430404fb3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ61994924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf268a7225526ddf9eab6a14b91cd72eca402522d178652e8c580969a348a96ff. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2152075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a41a5207dda65a4cbefc36e44919296fefba3cd482f6d320fab3e205b27f00. 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/GBKQU2152076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c80d4fbc2277d72a168e04868ea49b775fce99e854f18074b4498cb3063cf17. 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/GBKQU2152077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752645038fab25630b0da28b34470ac3f69f3b0a5d34f5f99c000de982dc9248. 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/GBKQU2152078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e130b241e3dc86419f8177e854f3c06a2f2fff071337e4564019584c9d121bd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2155126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44063f9e1a57867375e9e66bfdcfcf3fa1c8c4e8eeb0e1b8b3f7aa9ccf5fa177. 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/GBKQU2152079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7197502569a53f5cc7409084584aa2e7628be323f2fada4d299fb7d0784f8ce8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2152080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb1b9cf99853c4458afd9cfbfe1d8d014355deff8c3321597bce412fc3e2abe. 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/GBKQU2152081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056980c5cfdbf4ad51af86f3db368c43d859a0b559a29acaa1821174763963fc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2155127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb88ac5245a715e1b961086049d28cbbf9e58c91e9dab8e495a40df7d7a5a359. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2152082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e6041d7969b4d02ff886f10c690a7f85c010d734e1d7c746bf8f7e7608c298. 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/QM42K1754077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28f559cd84ddbece51e4127da4d54f6d5673e5c290b4c7233992cf9a27b1c9d. 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/QM42K1767134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b845938a30bcf0f6ec53be164a46595c4f80cd9342c65311f29f146a567dd42. 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/QM42K1737483.