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 0xe53107908aa239b857bbfcc80add07b4504bb7de50f2d93cbdf3583f538eb3fc. 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/1ac1b679-72f7-4090-bb01-99ccd65c00ec.json and https://artists.proofprofile.net/proofs/artist/1ac1b679-72f7-4090-bb01-99ccd65c00ec.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 0xec700298d0af56f27cf4f0ce172b16c6b443a18db8f6cf74f6a59867db3ceec1. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/KSA012302764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f3e0bc0f6e50fb9f662400df2c318a25eb4565fb468351a6fa83c9f9a45700. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/KSA012302766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d97d9b6aa55593623a776efb6d2cee9c36ba6eeebd480be521464f384719f64. 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/KSA012302783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9dd1f4a6b1b4838172687aa28471885a025d5791803680ac3ef6eec167de8f. 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/KSA012302810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58725713cc28b2bb79767d22cfe2bc2fce9715631d6370e43ee34608d6498300. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/KSA012207698.
유치원 & 어린이집 인기 영어 구연동화 이야기 (영어로 듣는 세계명작동화 + 영어로 듣는 한국 전래동화)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8846620ab02c7160dfb00baea924e26472c207d13fa69089914a512bb2f54ec8. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/KSA012207514.
영국 유치원 선생님이 뽑은 영어 동요 왕국 (0-3세 유아들을 위한 영어동요 베스트)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3632d9380f87aeaabe59cbddd8f0edbff04909cc2229ce7b8dda5ea600766f82. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/KSA012302714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a84c8bbdb8c2c8add7c51b7e76d16d4b0c406d2c5fcb1b2594bd70a0f75d71. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/KSA012302715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e28183f0590911f79ca5d00c0bab991f4e4f2ce26bd26383635af305451195. 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/KSA012302717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8ac117a1befb75ec65b3ebf9b0c60ba28b4e28899c3e3b7cf821490c2eee26. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/KSA012302718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5cf76c06054ef788cd96648c9ef1e43eb27c62bb474a50bf2baa7828974befc. 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/KSA012302728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c5258226feb20b20c73420f75faef839069e909cb3df906ecc6d9b9a368a55. 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/KSA012302731.
색소폰 히트 성가연주 베스트 (집으로 가는 차안에서 듣기 좋은 성가연주)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf920fd501c6ef753536b68fe726b7da4525e92bbcf37e255162d23034c0c082c. 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/KSA012198778.