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 0x10020d7242420749668062d0ff766bdc93ce3a26ffc30719397a9d48006c221b. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/257d7a05-526c-42b8-b4b6-8fc305c1da08.json and https://artists.proofprofile.net/proofs/artist/257d7a05-526c-42b8-b4b6-8fc305c1da08.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 0xd5fba6ff9a4c8a47010ebc50e9d59f2fd4fe59884115940e112ee8724274a8d0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US6QR2300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e151ce7428b8c7a683dc3d723db2d13c0d393d2c00712118d8b08d710982466. 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/US6QR2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d89fd98957a00b45d521cac902239f3daca5162678f639be1e84530e61014c8. 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/US6QR2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc76ab71a71d27e4c0c7fb5fc983c2ed5fdec91c5246426790f5e7740205611. 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/US6QR2300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf25cc63a979d47bce68de6cb7f5e4eef1fbc41261926b9a46a43f5838e9adf0. 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/US6QR2300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18dc8dfbdb0af72fe879b8b74bb915be7e3ab44875912d55e909b83b17dfa9c3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US6QR2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fe3e7fd1a9e4f1c4a98d50acdbd7cc067145e25f1416e096d78ddb4750967d. 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/US6QR2200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf08e5a38570ce3356b5e76ce506dbcf02a62d97242b6d10175aeee011034180. 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/US6QR2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e980cf9d120cf1ed222ccf70b81f5c6b005c3e385b22e6a30c12c3187a6054. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US6QR2300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fa15e0d123f720d703d3b29a4a011e288cae23adf6a2707222661db0f77411. 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/US6QR2300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810f133019c9e467adf0ede04ea6e83e42a6c06b51691ae12735795542e67ab1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CH6542433918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77994d5911697ca84c9723b3eda036ec0b70eba7742d394817f452f0e294140. 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/CH6542338965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e246190349ca20a30cffc06dcd70e5ca06f2768707b514dba904d7484c4c66a. 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/CH6542338963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e8a2c53a38fdbc5afa8b3b034f18d817f8857e5ec6f8d535da14ef32f10971. 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/CH6542338961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e246190349ca20a30cffc06dcd70e5ca06f2768707b514dba904d7484c4c66a. 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/CH6542338963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542182ffb11c067a52c68f0661d7bb8a930301572bf6bae8fd18f2385f4934c7. 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/CH6542046887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445314d5d91a8f838d86e4ca9f93f6e1cc69b25af4e802c06ef1433722bb5eee. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US6QR2200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e9705341aad16e6ffbfe3d433da33962f6fb4dd7bdb095a77637ed00a7d757. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US6QR2200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fe3e7fd1a9e4f1c4a98d50acdbd7cc067145e25f1416e096d78ddb4750967d. 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/US6QR2200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b175c54a8e0d7b738a782fe918a459b79d0ed140a2bed6b61e329709d579f5. 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/US6QR2200037.