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 0x0d4c0fe5c39d2e5e18cd78dd3d9cdfd5d747d9093b9ccc62eefaae57bb26a479. 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/faa68e42-58aa-4d35-a66e-725a205ca875.json and https://artists.proofprofile.net/proofs/artist/faa68e42-58aa-4d35-a66e-725a205ca875.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 0x696f1e25166c3c5e6b30a72b5ffdc6203c138b6e519b027f18e48d772706fd6f. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QMDA72222796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d00e36d274f765789fedda7a896a9864f652a4061b87ca536c78e06ffdebc3. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QM4TW1847285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260554060b2f9ae5ba272bb1a2c6c679608485e02f2f6dea88e4863b4b48cad0. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:48:44Z), 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/QM4TW1847058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4a67cb846d0b5cbdc67bf09a5d59fcf85847f26cff7e7db18e9b3ad274bca1. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/VNA0M1902416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74f6f638e3c46a2c579f6b19fb698dff2f84eedeba746eb52d9f6dcca5caf1f. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/VNA0M1902417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e71bb8e983624a95533987a7825b689a1ed13e2cfeb7a4e5a6a5ee7fb612e2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/VNA0M1902419.
Tâm Tình Hiến Dâng (Biết Lấy Gì Cảm Mến)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b8a5fcdf2a8695f1caf6a66cf8ceccbcda2f63e8566fb5423bbb05e39b37ff. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/VNA0M1902420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39da09ea419cf1bd4864126592b1450f950b6c7afa065ca22c6abad3c504ac40. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/VNA0M1902423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331475ffe72fbb7d7e6122d811ab0be54abf9d30d2d0096f5f021ae788ab148e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/VNA0M1902424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87faf11ff191ad9754a02e5d1a185d437f14017a4703ae5d23c9bb5ab591133a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/VNA0M1902425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb198707ca6a9f9ed6c4f2ba4df3801640beeaee229097ac0ae126698815694c3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/VNA0M1902426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bcc8e8f63378e46b14c48a995b31958e0623890ea752cec6423e5def25ee3f. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:40:13Z), 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/VNA0M1902427.
Đóa Hồng Nơi Trái Tim (Acoustic Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f18f42306218eb02377a4b1c69ae4471c6413d6768a252835923d54bc30cbc. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/VNA0M1929077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f18f42306218eb02377a4b1c69ae4471c6413d6768a252835923d54bc30cbc. 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/VNA0M1929077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48fd78768f601355724131ffd33878d9f0affb0ac713c3bdccc9df512b910d1. 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/VNA0M1929888.
Những Người Bước Đi Trong Niềm Hy Vọng (Pilgrims of Hope)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf73ee23efb57445751bb53ed9ac4f8601d3a76230c6ce38890f323b827ad5c4. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:03:09Z), 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/QZNJY2597070.