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 0x27de2be5769f2ec333c259dd475cbe1f37816237f8526f9819a8f3c0d5748cae. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91e90099-a6da-42f7-94b4-261cf2fac8e6.json and https://artists.proofprofile.net/proofs/artist/91e90099-a6da-42f7-94b4-261cf2fac8e6.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 0xe2c5229dba3a1602be93cb1ece99af45b8b5e0f9750049c7a878566ec6e270c5. 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/CA5KR2331464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6abef1343d5c28237be5a35abe8652d15b2c8e0a1e562527889d1ee5f5e822. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA5KR2286841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd65941ced7214691c852ae728fe7b7d50d10e464b8f8f98857e53d65949dd8d. 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/CA5KR2286843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6ada65b7e827cb3aa21cc55b07687da78a242e0b9c493bd1697cb9fccb15db. 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/CA5KR2286844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72d3cf820dcaeb825deafafafae11358e737ec82dfeb9562e65ef045b3c4084. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/CA5KR2286842.
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 0xd0e53196092d694d754c736a39a35185c5446539b2cb7b3116710576d753510d. 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/CA5KR2464721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cdca7a92d347123bb9f3dea8434a52b1fd2aa5c6f5ba1d98d05d1a9dad1a5d. 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/CA5KR2426719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af3ccc2da554750465c6d5cead872e9efc5b4b48b3351fd491fa0fae3078707. 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/GBFG92300202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6638df4bc66113c80772576b04d7b0f910ac168d3c32ba4d7662164389beb8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA5KR2325929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e27efc140fcc7f1f327eb7ef66dfa4fe63f8394b734ee77cddf0a09b576fc7c. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/CA5KR2325930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c95139dabb4cd90d130a98475ca47b563b90454e331f417fb975bec6d9c6d8e. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/CA5KR2310268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374bab64806a4279d55c3308de49752f1aae2ac921aea470b5c6c14a450e1c4f. 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/CA5KR2232306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e20b5d970439e0f18e09362f6f878206274a2d1c6dc53532c6eb4f489d30128. 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/GB8KE2202093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327fbb72e6c6e49e0b4feeea10b0d76b74da9f2bb6627a9a2cbc1ce12eac56e0. 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/GB8KE2202745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501fe9ca60d9645d8aa9fe78e683175980a4b9aad7ac263cb5d7db641b0dd43c. 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/QMKKH2100993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1483d008beb179370d47c1238777cde2aa13c37d3f83c42e812c13c6f13dc7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QMKKH2100992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e152f77007898e958d9bb79f954dd9fa1be5365f416d4bfcd81ea23584bee21. 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/GB8KE2156720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ea7dc3ff567a97205842b6a0cd824b559567b9480d94387671e450d8ece122. 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/GB8KE1956992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0f634f0574e45a35546a59950ab768b810304cc06a58ad5316e9abd81a0a3c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GB8KE1956993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdbf07c32836d94624def1a3285e3e2701a56e9dc3fa137fc4fef5f591839ad. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/GB8KE1956995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20093e9d0963a6ccf525d04a4f9434fefd57d0e220522a0ae827ddba96450f1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GB8KE1956037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7ef5b7890452d256777c3cf64b746d7be315aa9c276988c16da165b33ab714. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GB8KE1956038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15ce99362bbe3b27d8a44dc8ec1831be54b1c6733d06be682dff91bce750e57. 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/GB8KE1950526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb631841b833571de30cf5b68de744918d1a60b3142dc45d6bbf621ead6b802d0. 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/GB8KE1858908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc542d421c6fb66f6e8a09c889d3a2e2d378562625d8ae21b5a756daa2c0e82b. 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/GB8KE2154927.