1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xa487501f9be504650be6e852f7796bc5e58bcb71a72980d4fa0672196604aec3. 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/e836e3a6-cbc2-4eec-ae1d-3dd2263369ec.json and https://artists.proofprofile.net/proofs/artist/e836e3a6-cbc2-4eec-ae1d-3dd2263369ec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hòa Tấu Trữ tình - Tranh, Sáo, Bầu, Trúc
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 → block OTSBitcoinBlock must exist at that height 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 0x643a3cc46ad9fc1e0d39860c98db280eeaab6cc7e920375f7333b0ca8e60d1a9. 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/VNA0M1931029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb859c4b5d24b57b5438e84ec1b3742ef9509235acdff947360189c08d4e50b0b. 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/VNA0M1930683.
Tài Tử Nam Bộ Guitar Tranh Kìm (Hòa Tấu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73403e6e076f2c3b45a43f94c24a9c8dfcb3fbedcfa4956dae2bc5d9e9812f99. 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/VNA0M1840182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a6f9d8c46f2de339f819a26bb837f227bffdc84da4418db4392e222abbf3da. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/VNA0M1828745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de95871233230706d1e90762b04e1402bb73a27bb2fc585d369536ffda13c05. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/VNA0M1827618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c03b9b40e5bff9fd18118be012ab3f9c4e4fec8de001bbcee1e16c384b1d9ad. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/VNA0M1828469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9522012b1be8c2fbd8db0311ad9b3f6c6aece61338355dc7ef3544d57753851. Chain 2 (Bitcoin): anchored in block 957212 (2026-07-08T18:33:44Z), 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/VNA0M1828470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0822ac9a82f400a21f0b5a5609c5eae2af4e0fffb536c7b54513fca0081d31d2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/VNA0M1828472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54240cd885fc2f03db64567e403219dae5395d42f7808532cb8f38c7f872154b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/VNA0M1828476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9496cca380295226dbd8a91c0c10959614c0d1f6875766a459d7e208a6ff35f8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/VNA0M1828477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad106d4447107e39c54c0a1097e164a428489befed1291ce56a957da47c0f167. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/VNA0M1813511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae35aaa3e697a0d952f410d0d77e23b8b95df13805b372c3431f43b462b1d70. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/VNA0M1813517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbddde8c69bb5870f6e6135e2a9b711815f313b7c85e56fca5464e494e8a9ad6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/VNA0M1804674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3077b06270aaee07d141a6d006a464d92f992343e3c7fff02da375c7048027. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/VNA0M1804675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a96e390f2ad9ea38932db835bffbdd7e15de8bcdd04a8ee6c95957c100db411. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/VNA0M1804677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb9f99e3e2ff15e7e0b6bb060ae1f2de825ab7ae818a593290587753955e468. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/VNA0M1804136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33b81dc1c1a6919ac3c2577ac024bf81388fe37bc4c6a1634061e49e11416c1. 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/VNA0M1804138.