Lee Ru-ma (; born 15 February 1978), better known by the stage name Yiruma (stylized from Lee Ru-ma), is a South Korean pianist and composer. Early life Yiruma was born in Seoul. At five years old, h
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 0xfecd92278b5da876ce8c0a96bf2433f72ab34719201a9d08a428bd6c7af7ac6d. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c809a9e2-a848-443d-b7c7-551e513874eb.json and https://artists.proofprofile.net/proofs/artist/c809a9e2-a848-443d-b7c7-551e513874eb.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 0xd4886ccb836fd1cb2438890ca7590401d6407e3d7c79fe2538930c04a2a09475. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ITDF62133121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8058e6c3d5562dd85c0246137ad6ced6a3ee0d7abd86382e5608a9c116fe999c. 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/ITDF62133115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4223a21c3b54c3a18085b95ade5297503c8b3a5ded49be7c8c971da918f6252d. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T20:46:46Z), 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/ITDF62133126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82ae0e6503911474cc2d39a9ced44b59cff11f1964d509d7eea4c944886db40. 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/ITDF62133119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaba93bbda102b1eb089aa0ecacf609ee31616860c3a831f6800c57d2e3febd5. 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/ITDF62133127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821c07917f8a64b780b3a0672aaa3e55c9f228e38b4ee5ade02129f217b75a08. 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/ITDF62133233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f1cf21cb3ff1b6dfb2a019c0bce7dcafa3f6fd138460771b89312f0f75c6a6. 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/ITDF62133141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedb4d860b1aa9fb30fa311d12901fa856d8667bc8087bc55e3ffd286617e4ba. 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/ITDF62133227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f32031a383e40b2ef75a0cc4c8121657b8c80de327772f1268a9963983e1265. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ITDF62133159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93d8203bfdf710064153df459fc491c348ecd5ac8f2c347dc77428f860b35ef. 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/ITDF62133181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0825ee6b8c1b3a27b75cfc0f639c83bdc4dfb02a0a52e9075e0c1696e5756d5. 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/ITDF62133223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ee317d210a458337230593c594be043e68c51c2ba88cf7bc9b12161430cfeb. 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/ITDF62133222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2b59bbf78fcb9006d2098b4dc7ab128828ba9712170d76497828c5ef6c7ddb. 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/ITDF62133168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4c3caf695c72f8400efe2d40d20872dc4abeaa1af11ca2ddd3324fa07a3baa. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ITDF62133219.
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 0xce8e2a8645b8ef77fd62c3216dcf4693c241977e13dca02c7705b04dd76cb59e. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/ITDF62133118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddffb44dd33d2ac9906e70147378fa13b7b858f1c1f417b7a8363c2af7deb06b. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/ITDF62133123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50001c63492bfeb0f875ea59ddd104d3664d3884eb84fe1e5ea4a20a919e265. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/ITDF62133217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcf42e6027e647a63808b7e1fab0668378b0a64bd7387264ebca8efd1b84838. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ITDF62133213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d15eb8fcc57b2d31623da12197640dfede43aa0c26c041a20004d2a8a30fca. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ITDF62133211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4388509bbc98fe89d94f3fa146d391df8fda4bf10a8a85846049830b0522c1b7. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/ITDF62133235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece1510d69f9b9b91f3f17b33e720ad0b6570b2ab161b2d717ca186ff5ddf018. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ITDF62133209.
Happy Couple, Sad Couple 'N Happy Again - Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb024c2ea264d1c27f3911480dde285cb0def72a9548b03a0591676039f044152. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ITDF62133143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d06d5b699366f313a1da97def96974eac1f7bc887dbf373b9a3acf5ef9b109. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ITDF62133231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1d281a4b77eef5b7d8dbc9d62e479204873160338f30d684e3ff11f4ab65ba. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ITDF62133205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe789aeb4dae7702cdf8a04042183bee74e7ce3f191d0975c5efd08f72b641d41. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/ITDF62133229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508e994f40f1c3a5f2672aa1787cece851d70b0fab2265a5d2d5f506050e71c0. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/ITDF62133173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88d44674f7cde86e3a52b5b353755fef7f13ed5daef1fff72270d8e8b9ace22. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ITDF62133147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57373023cf64b964e2c041bfd8f0cb051ec3ab4a156491e16f0fa1ddac18bf4. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ITDF62133149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd16970d72459b0014642ac9437030e6db2a0c94a3d2267628a3edafca0af27e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ITDF62133203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebeceb00f908f62189c1e3cefc56e234b5521a1df4a7d3259da65ac69553dd74. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ITDF62133225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77b21f57e4062afa5e3a74ad48b1dae9d52ab7c0191a220952abfd9481734a9. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ITDF62133169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997e3ac335195052724e91d43a406628bb4f808ee2feebebc6a52fe076abce59. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/ITDF62133166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fa392c4f754646fbc77adb6ab21c1f046797d402e20c24b0eba7a685b1a2cd. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ITDF62133179.