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 0x355edfb201409bb790c6f77d0009797d7b7bd195c1a1f59157c1b24ff0cfe199. 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/54acdaf7-b2b1-423f-ba07-587251fbe633.json and https://artists.proofprofile.net/proofs/artist/54acdaf7-b2b1-423f-ba07-587251fbe633.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 0x306adb206f3023b2b35b80eb04b052d5852cbcd7fccad937e26d12a9de23bd66. 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/VNA0M1909690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed817f79d0afbb5b44dcb757c7fdcbfd9abd4fdb9f95d5ba2edca5a6ae55140. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DGA062073808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79dc2722aabb9acc7d418c4772e7f54f5cd0b8a25bddbfdba71f7ea6e5b91b7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/VNA0M1912302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7839a2e8738d89c6fd9000c62895c9ea355a4f16c95235628815020bab59d3a2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/VNA0M1911995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d6a7ef941a44333b389cc36f4a190822dec6b27c98b13443acd3ad549c4734. 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/VNA0M1926983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57f6e21a92bd63c1a974677caded1bf1224a9d49e559b01f8faaeeafa9730e6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/VNA0M1940702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd27f2ae99cef2debda36add0ddafb838aca1b754f317929a4c1118f2adbcdf. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/VNA0M1941045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a014ab9845e6a27007e663f3c8ba84b67c5e599f03e22fe23a8f7505005adeb. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/VNA0M1941190.
Kai Đinh (HITStory Season 3 Live Session)
Con Cũng Thương Mẹ Mà (Original SoundTrack from Phá Đám: Sinh Nhật Mẹ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a8e1326d02c8fc8062b7b90a6e4aa5ad6b5bdbde0360371f08e38ce5cd4ce3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/VNR011130523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8107389c7eb337c4ff665d11ef32a4199e40e16834f0f1085cdec778817398. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DGA0Q2383047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac51e10157bb7bf50d3215aa547cd30c030d01329fed92153c8119515300701. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/VNA0M1935115.
Không Biết Nên Vui Hay Buồn - From "Gala Nhạc Việt", Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac270566143636a4eaf0f915e4998585dadc79b6240ee6eeb56c37f493fa99fa. 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/DGA052346928.
Favorite Liar / 20 25 30 - From "Gala Nhạc Việt", Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58cb6639b518f0890c5bd5602668cdc18e7428fc016f530e36603dce834236a. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DGA052346929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4e5d3727cfa7e6b5573ec7797fa6a5c100785d730237f7963b42cceee23499. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/VNA0M1930957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff995a9dd215c85314671b7119c993afd3c4a1724a60013bc51571160d9936eb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/VNA0M1930959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5fb364a05c40508d8df99b967d09558db49e2310a81b1a3cb55db4d3714666. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/VNA0M1930958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e36b69934488bdbbf8270d1287a73a6a931c3ccd874b8871dc2aab6598167a. 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/VNA0M1930960.