KB, kB or kb may stand for: Businesses and organizations Banks KB Kookmin Bank, South Korea Kaupthing Bank, Iceland Komerční banka, Czech Republic Kasikornbank, Thailand Karafarin Bank, Iran
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 0xa19e32e3c5015178e326d9c900576d20f7f9cbc551811cce9d47fe2f85b6f203. 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/042fc077-f88c-44cc-945a-004a18c6e42a.json and https://artists.proofprofile.net/proofs/artist/042fc077-f88c-44cc-945a-004a18c6e42a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Where Have You Been (feat. Alpha Romeo & Wezi)
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 0x96b433f941b1ddbce8b05e123a6c0b48e0ee25d243787c5af2adfb5118633081. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/TCACK1505327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297905ad59a8e4188899e82c7ae183bf122172b2bda840df65267f1f68fab1b0. 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/TCADX1802165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611c7836d19ad0b58b9b7376c445f61592ced1af309202f9e186afd11d79ba70. 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/TCAET2073879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057925da7580090365504d35bb6f758b7c7c4b50bbac7e5a7e7d2d3b973acf71. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:25:51Z), 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/TCAFF2051087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf4b1a0082c2a01ba2824b2936c1425474bbdf3627e5e526101caba9e8427e7. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/TCAFF2051091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30596269dc0a01262041c24d6c00b67c080459dde0175e93da3ffcbb70806548. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCAFQ2197074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80776c9902cb4ac94f5bec3b6a14abd6966f35df5b46248d414f9f0648a515ca. 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/TCAFT2116537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39b92a19e37250576f808db0d0fec09da50d24d2c2bbf9209d7058f196f8075. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:29:57Z), 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/TCAFT2116544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e9a368b6edac9ff07c5758bc641ef995512f5145f8ff299d55a6cb76679149. 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/TCAFW2178553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61da5de93e0ccca9a4d34235919bab7760a28c79f2c78c1c0eb41d0d33a668de. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:45:29Z), 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/GHA3L2100496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2573d704a3d654424d523a7a950d7b52cdf9e3dfe518e4ef3a6d4bece644ce1. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:22:22Z), 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/GHA3L2100498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8004d7ff46e7f652161950f976f62fc32cfef91040208aa6c79a370d7cef6024. 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/GHA3L2100501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a6cc17820eb1755eb3cc9f49c787df24a388da93b90f203d8e5e0ea8823e85. 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/TCAGF2297219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa860fc7c63411abdcb6d2f2a06e817a4977cc8d557a52d862c4de502b65e063a. 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/TCAGS2381454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35254138088fb2f88f920b2398983b6323528bbf6e302fbfdf83a5d400de5f45. 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/TCAHM2374373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27efbe1d94c8b5b92282eb77a3bf4f93d65c85dc4d7ac1465d13095ad41d3bc8. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAHQ2336298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072ef978716b450fee692733383450214654ee1d590719192c443352f88497fc. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/TCAIG2473039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213ac8571efd063bdde1928ad1495b01a86ab3bd6080dd2cb84fc0a603e749a2. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/TCAIZ2489597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043c26d8b1c536deb2f3e66cf516f6ca94768444febc2ca9a323fc12b1f1d589. 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/TCAIZ2489621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1631e2b3b950de9c2cfcdc03ccdde45701e31bc6f65c1faff0579a6afed5afc. 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/TCAIZ2489637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d38455469495282c8722725c4d2e100426af7ff17ccea2edc0ca8784579106. 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/TCAIZ2489663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658d00ad63a3f0ad829787762dbdf9aee934a0e6563ba68eb2acf4168a1e8152. 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/TCAIZ2489679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cfcb05cbb805e386ec31c5fb241b50509b76d1a55b1a153d4b56bf16918d41. 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/SE6XW2555383.