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 0x5bf3517f9206e656f046ad3a0daf920f50874457ff6e7bf366fd3b4ea542a89e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e78bc741-9cde-4344-9e6b-276c0ccf33d8.json and https://artists.proofprofile.net/proofs/artist/e78bc741-9cde-4344-9e6b-276c0ccf33d8.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 0x5557947d6f7efe92af52f4d3aeba8df3f6bc1a31dd19aff41420b89a546fa50d. 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/FR96X2202666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6730436d7e194e7a5201db3403d452dae2e3dc5a91b26dfa21b10c138f8a435. 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/FR96X2202667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5234490c7088144254fa681991c1d932d7339a3add71105e13951ad113e17d37. 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/FR96X2202669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c4bc7812bb97f38f7826a7fa281890154088c6b91f647827bf30e71602a9e5. 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/FR96X2202670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb47446bc4ab5047d94a3755b69b2921233c4040b82a5ede97f1b53ead965d39. 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/FR96X2202672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb2afa32101b752bcb8950d71ed698f122a87072defdb31edbb5eb2216e49a3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FR96X2202668.
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 0xa0254e9c3cd65f503e097e114242ca8ca78196ba1b2a355fd092e8c394dc1d4f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FR96X2202671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa76fddacca930375bec2c014c4954d5994d8d3cfc9d6856c5d76f25a0e3486. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/FR96X2202673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944309b6917d3a7da06257b49c688f95ce493c7180723cffd5316960d41bfbcc. 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/DKES20800107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b425d36db81476c6bc3cd9bcf8b13b3e821eb4d725fd6224cdc7ca1fb1eb138. 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/DKES20800113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ce4ff3cf829812cb866ec442ce91c69f545e3c55242cc9fdc73b6a532d3adc. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DKES20800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003860768e49f1aa6fb14cf60770c3260bd284bd099f9d92322a158302c619a2. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DKES20800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9b8fed04aea6892fc62f9faafd2bcb121d1c82ec38e167f50fbc7607794456. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DKES20800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92edce4adc740b25fae0444c622fa0a8e84df386ab30ac285e58daef9adaa06. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DKES20800105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7684f21260b93ac4a61687aeaa8afa585cc812b16b66c25c179623ac3fb608d4. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DKES20800106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63ba34aba246c0f33596f8afe60f02c1e431fdd52509264c29cf7e5d113fc30. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DKES20800108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d45d170230702cf5be8ab718fd6a16355bb6fdd894ad92217e339ae3b3a90a. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/DKES20800111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e19d111e7c7057e9a729c9da28fce0fd194a58f0ecbc816792eab342d9c859. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DKES20800112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35472e0e00595df0c142a8d103a62fef227a66bc832ae070c4ad15fb782dcdc2. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DKES20800109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdcfce915f251601e818d571dbdca3a964b4b6ac0998868919706e72f3c772b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DKES20800110.