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 0x464da0d68d6d0a0392f7eb12effc127fb227a5141546bb3d4f45762aefc00d1d. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d7bf8a5-803c-4d8e-ac11-6e18253a4588.json and https://artists.proofprofile.net/proofs/artist/1d7bf8a5-803c-4d8e-ac11-6e18253a4588.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 0x54f244058ab78eea7d429232b3dc7c8c3394c5ceb2f749a44a20f143dcfc1e77. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:33:39Z), 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/VNA0F1700814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3c8401275d3c2df1e8da64d4a00b0383858e7bb44ed2b23e5b3d87ee906cbd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/VNA0F1701058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1442636949b15fbf2274e33b4250606174fe9efe13185aaef7dad558c90b0134. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/VNA0F1701059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624998acff6be5e81a7f3539458915557b36ca523e8bfe003a3d867937f8c976. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/VNA0F1701060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacae53ccd70851aba01e9e265f2daba0a4c816dbce1cc775f9892c8a3b88330e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/VNA0F1701061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50311472856d7274751c89fde3f3e52aa94076e37e9a0cb85e10728f7c990d30. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:58:32Z), 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/VNA0F1701065.
Hải Âu thánh ca đặc biệt 2: Nguyện cầu 2