thumb|right|Young male catkins of Corylus avellana Hazels are plants of the genus Corylus of deciduous trees and large shrubs native to the temperate Northern Hemisphere. The genus is usually placed
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 0x9b778074946d47191441f92fcfd7c1f431e3dc22ed04576c8f6046bcd3641d80. 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/df98025f-975d-4173-b13f-6415d3f8f1eb.json and https://artists.proofprofile.net/proofs/artist/df98025f-975d-4173-b13f-6415d3f8f1eb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
청담동 스캔들 (Original Television Soundtrack), Pt. 2
별이 되어 빛나리 (Original Television Soundtrack), Pt. 3
좋은 사람 (Original Television Soundtrack), Pt. 19
다시 시작해 (Original Television Soundtrack), Pt. 26
저 하늘에 태양이 (Original Television Soundtrack), Pt. 9
그 여자의 바다 (Original Television Soundtrack), Pt. 14
꽃피어라 달순아 (Original Television Soundtrack), Pt. 11
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 0x8ac89797b52ddfad8aeb61259dd88a5823e5c7351127a066046e355740cc5990. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/VNA0M1912525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b68248f109ab60ad34ff3bb45f3ecb3d39c7c8a7eee20a2de066751556268c. 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/VNA092109493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56f81714be08e2040553cda1f32a38d57cc4edb4eecb4b1b4d639f058b7cebd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/VNA092109495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e721c57bec3df977042dd13968944a6b968f3056e06d53018e69594c4c8a50. 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/USA2P2239964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4776413c617e7b64f8a693f7f1dd4ebd2f85051cfc28294db894f3711fedabf. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/DGA052206103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415dc83d8afdcfeac10d1e94a81f4f407dc2e4e389a7006f33c0d9e278ccd6f8. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DGA062242383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed68290df74fe419682de8a1320f1ccf94430dd05280af29d6f154801fbd0c4. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/FRX282307098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89c7ae7ad9d71227783a3493d8a0f380b0637652827bcc42a312012dca60f40. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZWBE2373908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e7510daaa66643c70d0eb2a21a3868b6c66dbd812d4f8aa45295b6a47ca6ce. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/VNA2E2313363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b9789eb7b66a17ea72c616fed3a62044cc8398b9d7990ad91de34b07b55988. 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/FR2X42463941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c52b9694afc2ecf44c5858abce17e6fc93b36a1fa7762f2d0642dbdd51799d1. 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/VNA2F2403013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e6fa7a5336862e25bed2bef9e14cf8435627db5551661d9c4cfbdb6e5de704. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/VNA2F2500641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368ba084f871bde2318569de058a295c911b86c41c800567be37a6c664e1c1f6. 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/VNA2F2500642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4449e59c4001db974831db9ac651a55263e433e0700f457ca6db1889b5058fc. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/VNA2F2500643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cf9f1e0de13a2239a7e249236a5d89905a47b07c5e35c535863bea7c8ae82f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA0M2411734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7e04532ca935a57cfe94c60dfae771fd76ac74cbae892656d2df9b0af9ef70. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR2X42343202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ee29cb49808256c648169903eb2f609ca7db72176f2d37ec0a3cf0b067b924. 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/QZES52413851.