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 0x3344edcdd4dc839b8c1bc7e5df984b7a8dedf0ffa05ec47719a39647d3a844e7. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e400e166-49c3-459c-87ee-7523f52ee201.json and https://artists.proofprofile.net/proofs/artist/e400e166-49c3-459c-87ee-7523f52ee201.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 0x407449a7a01126d8a819298d64c3ffe2c47ecaab94a629993440f57fc0a5362f. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZYHM2359509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ec750e9bf71b44c1597ce822ecfe1dcc65bc874d73cada96b6e6f10c70af1a. 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/QZYHM2375043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9271b8c5da92b896d1f6f3b02e86aeb07c6d7e2b163d3b3ea9b5f4f056b57488. 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/QZYHM2366034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b61ad65bde3705d466f6da0a90c2dc38f0004c7a6d71a6000fbfcd086c96b3. 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/QZYHM2349976.
Trách Duyên Trách Phận (NH4T Remix Ver.3)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f530ee04c2bd56f822db051807d3a2151942efe2f48908bf16602b7336fe8a9. 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/QZWBE2396357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e32435a7117c755b168363c339d14ede5a939a84433dce456ced535f6f4625f. 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/QZWBE2382704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6001da2ba28b7e1e17ab08d619866733e6172bc5cf4eefb099e37dd1f660d37. 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/QZWBE2364432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64084c8e20745661da4b8acf16f4dc78fdeeb5511442c29855497bea92fd85a. 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/QZWBE2348962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d1e3b5e528b2ed34bcd4071d09b7d7332e264438701e618e9e476300aefa4d. 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/QZWBE2304123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c29614832c2435634639d0669bc22405dd920d59e3fb5cb3c63998ba970b6e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HKK972308530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0009140fbab2784a16e90355548cabd546f7dea75da274ccab302665a8f0f0c4. 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/HKK972301477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f816b03858f64ffa7ff67a5a8819c45fa8edf02368cddbaa5fc103b3ee30a0d. 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/QZWBE2247770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0470bd82f100048a9c6336c009cf969e8aea0243931eca8d1ccc4224d0a745. 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/QZN882277793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7b8b8d89d431d34e05c33175961b96aa354336210733ff33102e1c307c3546. 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/QZYHM2425493.