Yoo Chan-wook (; born April 27, 2000), known professionally as Be'O (; stylized in all caps), is a South Korean rapper and songwriter. He first garnered attention when he appeared on the rap competiti
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 0x54128acffefdf1ceb620320f3bbfb6af574e53f787b3076feea4dfa7158e0508. 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/c02c5e48-d1c9-4bd7-b665-e7227a31e387.json and https://artists.proofprofile.net/proofs/artist/c02c5e48-d1c9-4bd7-b665-e7227a31e387.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 0x5df21b45298c0d5ff3904782c02587c38b0b38a24d9219ad0f5b830b82268411. 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/KSA012242562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ead0b318f57d203d24cb140acbf42bd2796f4310d2867f63119dfbcd01e6c5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/KSA012242563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12703a890943219ebec7660161481c05ac7ff93e2f6936c83de9efbd8382c23f. 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/KRMIM2301542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ebde08adc1f9326be0e6ea832bf9eed3ba38ca68213e0531bc730b351356cb. 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/KRA302200217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71513bbde6a133453203ec2dd5c612f9ddf985cfc33f4eea7a64cad49fb10b3. 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/KRMIM2427556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd2e7cf5596d53579b4c908b4562db2b0ddb7251b99315d3de00601bf6d1d7e. 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/KRNAR2338778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b884ff72f6b119903f4f3c6a5f12e470aa785fe6219c0f574e8b36c6d1a13e. 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/ZZA0P2309259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d08664bc2adf908c82d140a5e66938d30ddb0a096cd9e6911483c7fa4337b3. 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/ZZA0P2405140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e96f41b098fd2b04f9bf7f6ac47dccc9a7c3b1efdb11bbcada8819d7d761802. 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/KRC712200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bdb9e96c962903fe56409c67bd006e4692e576268413d7d5d5c31045708d38. 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/KRA492101300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb59395f0db19fce3969571f9d41fccb4647732ae0e16b61240fb220b174d24e. 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/KRA492101245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d105eaca57725d7c975f45b3641c9b903e1e7219469f0f9c60208acda6d754. 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/KRA492101403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aab709c419f49b1be352b4d478986d283185392a4702c871c389e42c9c4940e. 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/KRC712100073.
Salad Days (feat. sokodomo, pH-1 & BE'O)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36aac08e51dcb61cbda6a723fcac081382e12c0c3337523bea62e6edda3af603. 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/KRB462200785.
Without You (Feat. ASH ISLAND) (Prod. GRAY)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2558e8820ec60811b5494f27a932344375bbf488bcd32f7d951cc0ee8c014a. 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/KRA492101359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eefd9f74d61eb931cbd32fccd74d88ff9fa034230d6e31d4addd1b3ec14775e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/KRA492101413.
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