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 0xd374d99dce70faf34cee5b57a17559f30ee3634100a25213f4604313b53e238b. 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/cdd37209-d1b7-4464-8d18-3b4aa79dfd95.json and https://artists.proofprofile.net/proofs/artist/cdd37209-d1b7-4464-8d18-3b4aa79dfd95.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 0x50cde68bb817a19881fa7816d69158860e5c6d80767b92185a5fa136f0282bb4. 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/DGA052085118.
Tuyển Tập Nhạc Trữ Tình Quê Hương - Bolero Hay Nhất Của Lê Minh Trung
Liên Khúc Trữ Tình Hay Nhất Năm 2017 Của Lê Minh Trung
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f6adb25f91288f213dafe61f8a45f4f5447450415dbf183e3e4a3615708f05. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/VNA0F1797162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ebcd8037584816e8b305d1d5a2c2a2ddf296bdc06278f7a26542a522bca910. 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/VNA0F1797113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaabb8fea5d6a738620b4a0869e6a90612aae8a001b5993ae8a8b283ed7c068c. 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/VNA0F2107921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b962ad76f8a93b3f664a78474c349a328316a34ae4890e5f6952c81e99b43e. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/VNA0F2107923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a985860c41bccd5df4cdb93c6a9fe207bf491f1579c8b96283968c7639f463. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/VNA0F2107926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff79bb86765f9c9b7f1f17da5fc091d2a5b447699c38fa312705cf5807ab38a. 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/VNA0F2107929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabfc7adfab2f760abf0339d1fe4cd908fba4de212beb8cbf078d96559753153. 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/VNA0F2107933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03702af739c13467a6dd45e2bfdb9bc54013f18811f9dba3ebdb5b3668eecc9. 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/VNA0F2118269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c7ba2d126fe6b5f78f62dd8f228bfc8460d999ea184956c34e25ce96426580. 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/VNA0F2118248.
LK Tình Thắng Tiền Thua - Cơn Mê Tình Ái
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2703cb5f077a4cc573b1d56340189b9ccaba6d65b8c72c3755d56baad6adbc. 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/VNA0F2409884.