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 0x16bbe3d9e300057b597998398d002615aca8dd82ebf4338dd849db1a2eb06931. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/355dceab-b264-4ee2-a2a5-9b66ab18b538.json and https://artists.proofprofile.net/proofs/artist/355dceab-b264-4ee2-a2a5-9b66ab18b538.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 0xf6e8939bca48eac8af782a0dc51ac4aa5bcef7a4d32ecb92cb5be15014d83d55. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QM6MZ2229308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4dd7f811f40950fb706ec67e700abe5f6b8526befdc8d466fb357d8137bed32. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:36:39Z), 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/VNR011131949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b43e29f7beaa5a90a8e731e0ee61f974bcf6190c181eca0cd0ec1c4d64e1e9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/VNR011131979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b43e29f7beaa5a90a8e731e0ee61f974bcf6190c181eca0cd0ec1c4d64e1e9. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/VNR011131979.
Lại 1 Ngày Trôi Đau Càng Đau (Piano Version)
Anh Chẳng Thể (Prod. Xôn Nguyễn) [Rap Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4416a886840bfb819949de34e79751a21a574b36c79d397222d04a1a8617cfa. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM7282472658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820f8404974a36b31230b76a9cc98d817417ac43d33fccf07fcea28df6ddf723. 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/QMDA72407950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1990de183c0c037f9d67c7df87a4ccf61842519ba52be5c51a2a16d74b505138. 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/QM7282530267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69a96732e23beb592f5a130e9b3acb487dc8ce1d9626a895ae0c117463089c5. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/VNA112100246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bcafdd18e08d94af1971b797a67b69c951f3f4e08917f1f9468612273353ff. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6P42488517.