Oka or OKA may refer to: "Officially known as", used to introduce an official name Vehicles Oka (automobile), a small car designed by AvtoVAZ and produced by ZMA and SeAZ OKA (truck), a large 4-w
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 0x38596a4d6706518fe74967b98bda8a15a7648e851dbadca625f22de4d3014c80. 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/f0060dc9-bc2f-46bd-bbba-d260e9450c7b.json and https://artists.proofprofile.net/proofs/artist/f0060dc9-bc2f-46bd-bbba-d260e9450c7b.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 0x46c0fa6262d6ebb9dcde67c321ff86997a90f4582b498f6308af98f13dcb634a. 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/USHM90592712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b4ec26d716b92a5d05c684b15652f42d5dc59a2024dda69458a764c82fd36a. 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/USHM90592714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63dc0b4b5e3488bc50c6f13d2c12f8dc92b17009f9c8c643ccf244cd5604489d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USHM90592715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bbf87191c37c462e64ffb3eb2c9785761193bc87f78beb63780ea02c15507e. 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/USHM90592716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892e1cfe80985a612b24375c6c070df867472bdc90a62a6e518423a176f85456. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/USHM90592717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0849ea9fd50d58d8063ad78a9dae4c76f17dbc32c6ab0fba9c7a304dbdd8f4. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USHM90592718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7921aa64ec561955ca89f1ae40fe80b74d580c84d92428310948d0e5e4b75b3a. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USHM90592724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef8833e0366e004105409c5f60f52d37611a553ae391e3ce25f4f1efbe6f6d5. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/USHM90592726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24240bd126745927f25c4d50b54ecffefb229b313e35d2f5b8f20a3b0b655f10. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USHM90592728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe6f4e50c0ea45b65f52269eefcd5bb055961128ecb20d8dd7b8f114e26a8c1. 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/USHM90592729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6147a1af19e26413c8223c3b5cdb6906c40128585c981dccb01190cc068bfd9a. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/USHM90592730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7321cee0a3b3e112bdc66ae3e0e91e8cccff42e535c07c03a6e9a764951b2f90. 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/USHM90592731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa039de5c7e8b7f861883c5ee8dcf79578aa4b2eba13ebfe2a58660a0f0b389df. 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/USHM90592735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be4387a0f2158875c7118c4670bab45984c74c2770aa3ffc91fec3003ed294f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USHM90592737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d4d640b996e14ebe4bb483b9f6b84d5ed718c3ca2e27b29d674d54e101b027. 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/USHM90592738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f948165411a6f9f2b742f33d4521bdf5f623233e705b4531fd25b4310c9765. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/USHM90592739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a763561d6e411c0ac342cc1dc5f5e8e27d77465562ca07fa55ea2092f2950b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/USHM90592740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3462e0a9c3a3a65a83bb97ee4d4097fdba8b23146ec541d8f41344215cbc1d53. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USHM90592741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889986cdf7c202952a90350050cb0bb783dfd2a47113b6c6de6f8da404fbf4da. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USHM90592742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d63b692b7384b34eff038247c57d003363af593d90fdfb9340f85307658339c. 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/USHM90592743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f8e2eba87efde405812310f040081dfcb8ceccd7d807696eac35b9969cd68d. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/USHM90592744.
Makes Me Happy (Artificial Coloring Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4b1953f1b0e5b10ec6dfa2e16161de2424eecfe982233bf8cb04e50dbc08d8. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/USL4R0766209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79cf7bd8c0c79c3ef533c3b5d8077d5f6ac8724e1772eed13ed404c7894657e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USHM80731479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0676e6f2c984abc3650550ba12804ad7488f6ee33443ccec26547919853bd02. 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/USHM80731480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dc6b4f6f8c0be376949216c495f73992346984a75de3f32f36ee05a096ca67. 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/USHM80731481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe8fa825da4625f477324c3eb575ff8ca1ac4a77c41e98fa7ec1cf16152d72e. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/USHM80731482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7267aa6c9be8a2ebc5c5dff7eb895d44b6ab0cf5b439b4e57f5fa6ed412dbe0c. 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/USHM80731483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d85a92f2b73c692342635dec1567b3809a9fee5aab06ad6b74c52162df337c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USHM80731484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd305bdf71d407642e394b3bf9bc891bfacef57db84916c2d4f9e5efb678f3054. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/USHM80731485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b00171cafb3d65440190ccbf466c2cdbfd0781415983428a8ae329089e49242. 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/QZK6L2535676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6ae99f6376137ecc717b1e54c09bd5a9bbce5e0cf8a93dbc81da69278347b2. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZK6L2535677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a523350588a990772d691b86f12db54b5b062e5fd5991d4ea8776a4a714d5a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USL4R2052917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6f261321f6152b9db71bafdbec0da7d401f2f0f6537274208fd447405a8d2f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USL4R2052918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb893e6e66ba1608f8c612c966ae4f6cf26528a9edcee296de609c94564032684. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USL4R2052919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57386a6fe6c52e9a45b9f96f283f856809e90a9e8db2690876b873c625e657f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USL4R2052920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97be3bb5c92de73f36c78794eb85249ec984d15224b1058e929e730572a1a48. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USL4R2052921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ad3ba312cd4cab2a51e80bda3ed8d20815d2ca2b5841085955b314a59b3051. 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/USL4R2052922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67e532a305f20b7196aff3434e6963956b16a54da2c6e1f4df2f291cf6482b7. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/USL4R2052923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86130bd06c83e885987af2686dc6ee3754a0f6bd323c4a1aa958e1e63c44144. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/USL4R2052925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc274fa03d300133d26ca432e506eae77dc1b2c83e746efe6e996561b54bb9eef. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USL4R2052926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8920d602949b18c0f6952fb4cec961178a542f856a188235486c9895a334d9. 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/CAVP11500020.