KRUU may refer to: KRUU-LP, a defunct low-power radio station (100.1 FM) that was licensed to serve Fairfield, Iowa KWQW, a radio station (98.3 FM) licensed to serve Boone, Iowa, which held the call
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 0x4f4498139ff2fedc345e19223194f9c5814c185f42b27bf88e3662fbf2862627. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d35705bc-bae9-4d1e-ad35-04960c5bf70f.json and https://artists.proofprofile.net/proofs/artist/d35705bc-bae9-4d1e-ad35-04960c5bf70f.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 0x2fdf76a8167a3aa6ddaa9c1fa444c61eebb3ce51c683a0d8292821ff93779c18. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZK6L2456075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4017daf1af27897b92ec0da20d0bb23742d65d0711c738c4168616da19602a50. 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/QZTAS2458462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbcb30d1748544ab7f6f5fe9bc6676922354c55806fbc246e879d0e08464b78. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZTAS2458463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f114ec7e3d5fe3709618b9092a09dfbb5747107164e5403bdf481deca793f40. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZRP42441800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54126cdd2cccc6a18daa5fb316edb1faf6d6a98e28e63126b38137664f5e444. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZTAS2458466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca331769d7bbf542b058e3745f7ac1330b358043ff4ca20e0439ff801ea1625. 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/QZTAS2458468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6adbd3bb9db0c2889b07f6fcc4fba5905bbfd619d74d008b289c1a675784320a. 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/QZTB92483188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4058b24df7f349a465a189d0bd652dcfc66ad790f083d8d74c5d811e5edad75. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZWFT2415325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443fc7a94ee967866406eddeeb1ea0bac3ee13e0cf7ccda2cbb5324415782b56. 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/QZZ7M2446937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d47fdd2b1600c3ba4163e9da4878449731f7e3980b6b5f6f019a5535de92599. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZZ7P2498724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ce14b3c759f60494be16e1e41139e1da8c41c82d4c1f313b2b913a839d76e0. 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/QZFYX2533412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6b4e3b2545e268a52d0f6f3dab7127f9d99f3af1682a49c7d8771273035606. 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/QZDA62502150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6bb74893e84d0e8fab4a7ac036ea08c8a88c76abc7f98fb61a7c1fca43cb4f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZES92529517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f7a0c6855bed3109875bde6ca97fe33e25e374b703a06c2e519c835a7f68de. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZES52507418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de95beaf98f2dfa60735cf01085786780e86481a5603e0672958b6244680fda. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZES92529518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa09f641919a4c01b2ac8230a1ae4a886b8ee783e17f220d034dc08103ffaca0. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZES92529520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b95cc7eb003537d1015b7039cbc639d9d9cff485c3cc3640e7015fb21a4090. 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/QZES92529521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe70f263a8519d9fc77ffbeff0c636485da8f5ec709d27af6e57a809b100138a. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZES92529523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1308ddae4416c213533b78bdd6fb1685d50468c1f1c3463a2f1b02115df5b52c. 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/QZHNC2546748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a54d20a2d99d57f38417170091377a2fc6f709781ba69890506dcf8423082f. 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/QZK6P2503972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0460cdbf8bc53628eb0ebf177d115a61363ed5c4562fb8d2ef633938b8f28dd3. 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/QZK6L2562439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb10399a2aab3e4793f453f063b0fa187f0f85797c3e9308a3ebfb6b02494b6. 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/QZK6H2578599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf313cfc3cc1173f6bde8b3138cc803eb74bc77ee952fb36e849e7469c9f5abb0. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6G2531410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d26f7c645c8836f5bad7a14ac7145d27cde6b424456df8b5ae944a6c22876ce. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZK6P2505240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c7f1d452f34776531e1a11a5e9b458558383f8730024ca96210387ce0abc30. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZNWX2501289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64705bb4df209c5b362ecdc5d41781c36791cde5f55d7f10c67700692e14edd7. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZNWX2501290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6ed8033e8caaa280222630b52f5f5b9b66afc43da4ab343649aa52d87417db. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZNWX2501291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863bbee8a8456402ed24ff1ce7e73d207eb3867a4b5ebedba49cf5114cfd3929. 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/QZRP42565108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed44e54cbaaf8e872d6eda9eedb121020f1063f4e5af5669cb86986800659d1. 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/QZZ7S2539236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68b718cc5b48a1de770c33c0b5ebc850ad363e8bb38db8b3c2b7f898a5fad1c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/QZZ7S2539237.