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 0xd9542101fbd8183692a87ad6235afb9d17f7238b7b3a1b8a3278750e5c7857f1. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1948cbc-daf6-42eb-8a4d-debab4d5e38f.json and https://artists.proofprofile.net/proofs/artist/b1948cbc-daf6-42eb-8a4d-debab4d5e38f.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 0x7b64af342e3138ccf78e17b4e2d245674cb5332f76887edb8a54ec20b3a967c8. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCADD1761658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54641a986fa986fcc39376153634c4e205b4079dce28783f26155d5a5799bb3. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:09:04Z), 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/TCADD1761684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568d96590d8925e7b25aa3e788217f57a16c97636db2633a465b2773b0e12d4c. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/TCADD1761720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307e07f0a783b0779d88abf66d56a8fef63b8de7116e1fd68ae511a23c815d0c. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/DGA0H2433408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1e88f5dfc1ad70a81ea3ebdbbccea135c5bd47d65ece5e7b5ecf9468cc039a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DGA0H2433409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398f965d30ebe090e643301a09ac573900938ab68b2c0164a13b4a412f7a640d. 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/FRX452500600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fdad76f5133bae5a3528000dd2f83b2b6753ae4599c67a9c07728bffe88ad8. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:02:44Z), 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/FRX452500603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5182f4f997125f52f2c8b77da59106b1e9d20e1d7c8cf21e4cd7fa1f4c4954be. 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/FRX452500604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043163d36033c9f527eb2fe7bc3b005ef960bea2d2b7b47eebbbd48de3eb71cd. 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/TCAEC1903007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54342c387ce19d04c2f1bba88f745b02e2d25eaf384796fbc95c7376855172b1. 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/RUB731417872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209c020ee710dd7d34eb378befbe3dd4dfff7c1c1364f932ec2783de197dc970. 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/FRX872200609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1dc528059dc0eda9d7bc31d8de8a95c427eb16a09ec91063dd06afc4a40ab8a. 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/TCACP1626135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c07f9a9059072fa01215409150b77ee4958bafdff173c0de0a538521719df8. 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/FRX762112014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac70cda8bb1abf8fecd19bf8a45b3e2e3a205107ce4ca5dd57f57de3ce8a0ef. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/TCADB1725048.
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 0xe5089f8fdedba72fcb7d2330324a93228a023e0c4d15551ac8d674c8b087ca23. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/FR10S2036020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86962bacf9cba92e25eeb5095ce20b775a19bbef2c9d318da3ff443af5890ef. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCACP1626136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cdf1db8492a5526c2de4f23b27a8a153fef2ec69a7c3d113222fb0bc461048. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZHZ32294246.