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 0x3aa6bedcad71c65f556b7ea1223df5c99a2fe28883b230c5c266d494b0a26fc0. 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/6060b025-a950-4b87-bef2-183ddc4b27fe.json and https://artists.proofprofile.net/proofs/artist/6060b025-a950-4b87-bef2-183ddc4b27fe.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 0x4ee1842a09cd303a6025163de88107b212c0e22a6fe875c2012a7a3b164296da. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFP2333252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61ea838ed20bcb871f58e42f5cba14e31e07791c05612f0c14f86db41078941. 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/QZ5FN2438863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4d8317b9536c9e070432223336bbcf1a92485fdc4bd94ccfd6ddfbc820e5c0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZEC2460444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526b72054e0f0de0c2361d4d967aab5ae60a1d34ebb62f2c9cb4b11f3499252d. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZZEC2460448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1986c834335120235a95bec84058f8ff05e56ec062bb00c5c0e45508823dbd2f. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZZEC2460453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd36e027836f9f234ca1ae7960a1031fcf6004e208a0839bd74cf4f1465c35f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:14:49Z), 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/QZZEC2460463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74afd1782ae27439aee25b5f25d941c4d751986114484956756a37168e29eb9. 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/QZ5FN2361735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c4bd2c9c899514b08aa147b15cd5c99da8de340118c20a04805300f2faac80. 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/USUYG1428920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea195907e5269daa6238d3d5a6fce2b1f6f7fc33e695455d14a860340bc8b66. 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/USUYG1365343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8786ed0619251b01c04c04b8ccd460e18811ab59bd0ee86c36cac03993996831. 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/USUYG1294515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2678e42efa6abf34b29617e38c1ac24f1860ba3f724a32d5e6e5c1452b1f944c. 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/USUYG1294517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea195907e5269daa6238d3d5a6fce2b1f6f7fc33e695455d14a860340bc8b66. 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/USUYG1365343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102eebdcbbd1454f1868ac858adb89829b233f3f3e84335d4d6b7f5e457afe16. 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/USUYG1365340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe8302ac8ad535fbb6222190ae4975af6f2e32849fcea3c9fc1e475457cfdab. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/USUYG1365333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587c6ae60453affeb1ce00c0aa8a9acefc23c69d636d081f3f7303a3f73e97c4. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:22:30Z), 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/QZ5FN2438861.
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 0xf74920e48f1cab61f09030f255ea420452efa21b226b66696f3a684ddc517b29. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USLZJ2303825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb21f794125888e66a0369a217beaec96eb35c602f8af814bf8ed3e53812f672. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QM6MZ2039273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb621bc8f3bddaab7bc93f0cc89caab9c04e7fb56d77558bd15c602c2e5b8d717. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/USUYG1365334.