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 0xb701846da04dbcff7384a39c38d98702ea92a0e932b9a254976e175a2b4c180d. 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/a03a7a9c-9148-4253-b137-3a99d0382cde.json and https://artists.proofprofile.net/proofs/artist/a03a7a9c-9148-4253-b137-3a99d0382cde.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 0xa5c8946da0c850f4c9c05be10808c8d8191aa16ea9713dcbca889656fefe4b0d. Chain 2 (Bitcoin): anchored in block 957697 (2026-07-12T11:22:18Z), 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/DEZC62101545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f8f0ba98aa2c7a814ae80852347a638db850ca9939a6b8840cbbe71c60633e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEEP82200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca4383ee0ae52fb72172720ba103e707171e3a107ef389d50c78d915f84e249. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DEEP82300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5711b23f11cd8faa57565529dce4fec108bcba4912aba7441760c7237ea7af. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEZC62369983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f724fe5b9e7c39c1fe67fac0b498108736e70dc210468937aff03ad1115ca32. 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/DEZC62369987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b54cfd7a5f859301c4ef61fe1504875f4eeb14326f3d9da78a08f9ea44bee8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEEP82300158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe8c4d2ae7734b875e355be8f586c6c85eff0bdd9ed140c57836686b14b5dfa. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:20:54Z), 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/DEZC62400435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4d64d05b6adff7832d6df333e03c7530d1fdb973fe899636bb502485eac9d5. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEZC62413417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5854443b817052f1ead5be01e215fe565f52baf76490c3137de6031a31cf02. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/DEZC62413419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc3a3c9907ab2ae39dca8a6b6109172a47e1f7c8274fdbb69598a50955412cd. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:48:56Z), 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/DEZC62413421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241800ef678e5a07b30304a85fc97bd35e9a1083d176814fb72cb64f1f62122c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEZC62413422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0c5df9feeece8353f885b4506b6abe3e3b0176c9d4ea78385d278304a2842b. 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/QZNWX2489264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfad652018d33f82a8eda762cc5158dfa1162cbd04dc843f6e0d09c0f92981c2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWX2489253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1cb41362959ef649e2f46f851faacce88071926528620ceca0aa0d4c3658b6. 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/QZTAT2445533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadb6b2f7af643634e6fa2b9ec1be8d90c94e078ce2d4f65abb07c566eab23ee. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZWFR2401422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa398d499a05ccb4913ea84de63e9454717b1350482a0a707abb316b2187a83bc. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:10:08Z), 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/QZES82531632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5854443b817052f1ead5be01e215fe565f52baf76490c3137de6031a31cf02. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEZC62413419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d2dfb999cf3266f38b96fd25978618ddf5942760163288dd9f4df5b55c35fe. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZHN42552277.