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 0xf2213302c13ba1fcea2507a338e1066e1a86a8770df2b67e190f9fd46e7836cc. 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/c176fe59-793b-4c97-ae23-6612da3931ac.json and https://artists.proofprofile.net/proofs/artist/c176fe59-793b-4c97-ae23-6612da3931ac.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 0xfd2c9bdf1ce4b6357677039ee5271babe433d333f0cc83d4e256df7ae829ba48. 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/NL4HZ2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c1267a2c29f76b384d080ef935806de9ba2f598e20e155d4e038f1c6fe1774. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NL4HZ2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c3339e45a9a85b157be81084770c145bbe64fe10adccae4c6ffe8d916dcc8e. 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/NL4HZ2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0906e9f9dc0d343e70a245f4a94e99fe479571accca7ded36ce1f28d612d836. 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/NL4HZ2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7147e6489d5e978e653546cef3e4f3027f3d0d882c22f576f41afecd5f463423. 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/NL4HZ2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8829e36a645182a190015b28ff77e24ea3d83e0eda72853c56e649fdbc2e8b. 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/NL4HZ2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69398c392b4f4b9f63cbb9acaebc80e81838c36252912377ff3f5790655a87b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NL4HZ2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb790cea03d384d428b3adf2647de38ca6c81a2badbfbe2527cca613d08b9e66. 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/NLW5H1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae2cf4f5de4312777ec5ab3bf4016db11663afc237694398e1989939f71ce65. 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/NLW5H1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1888f224d12ff5753cc376ac8dfeb3ed79010bd646128c04c283a9568b84523. 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/NLW5H1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd259738ade3bb08c560c4c0f785ae26543968184544d3bf5797197f366bc49ea. 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/NLW5H1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b68e5aefce49399b2793d39169775f36e64021f4e6254fea48f8f0bee57a2a. 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/NLW5H1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c8ed314c6769db93498e764309e7e9f03636e163abb2946cb9718f4c8176d8. 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/NLW5H1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d3f98774cce7f74423296bacb912b11180f9866992803e9e3061e925334172. 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/NL4HZ2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bac3fb37e97e287da7778d5cf4cf5dc94d5f68e79dd74cfcba6409de96e239. 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/NL4HZ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea20e93ab390625a380602cff678cb3002a8148890cff3c3140bf38ef007326e. 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/NL4HZ2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a03bbb89e525225c9d591ad335a188189007c0b8980f82d51f8475f200957ff. 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/NL4HZ2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6222af26a9f0cea97f754a641a98b834e97e6d903dfa56c3e83c306943d80ed. 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/NL4HZ2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea20e93ab390625a380602cff678cb3002a8148890cff3c3140bf38ef007326e. 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/NL4HZ2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7385bcf0ffe4d7e73e7b3acbad4937b92e575557ab58af479f67e4cfa397e686. 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/NL4HZ2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748983c5d3df746dcf95b7d5ddbbe7566dad4c45e319b1e6793708c718264f35. 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/NL4HZ2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0906e9f9dc0d343e70a245f4a94e99fe479571accca7ded36ce1f28d612d836. 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/NL4HZ2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8829e36a645182a190015b28ff77e24ea3d83e0eda72853c56e649fdbc2e8b. 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/NL4HZ2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2c9bdf1ce4b6357677039ee5271babe433d333f0cc83d4e256df7ae829ba48. 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/NL4HZ2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c3339e45a9a85b157be81084770c145bbe64fe10adccae4c6ffe8d916dcc8e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL4HZ2100001.