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 0x9819da8fcbaecb944d49ab65b2131a57dbc8d6acd83a1bf0e4b923412458de7e. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e64ffedc-5f6a-4b41-bc59-8372d6909121.json and https://artists.proofprofile.net/proofs/artist/e64ffedc-5f6a-4b41-bc59-8372d6909121.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 0xba7cb7ac1fa545567962e14f4fb284bc3605feeb763883a5b63b604dfdbf9019. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:08:54Z), 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/QZHN32104694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3593b85b22654632f3be5f5b613bba5e38bff61edb3231eb2b50bee11323ec1. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHN32104695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954c0c2e4c6ac612319bc62f0b064daa5a7c0be8dc6a53af7c4e1163457cd1c4. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZFZ21946224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64babd7f0fcb12742aaf8396459b599079480af570a7ccf10e346a7a9b4efe70. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:34:48Z), 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/QZFZ21946225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c80aecf16309d7333b63e56781edd53794eac7822c7ba2298f77a6b030f3ff. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFZ21946226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98158e122842e4c6f33edab16b5abfa82d1e8af49af77d1a5444906622a74b60. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZFZ21946227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40d1eca4845a599f67c1030086cc7630a9d40f3ce561cf0da997987ab0d2e06. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZFZ21946228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426afcc442be26d65903ce338d9249f132c0b2b3605640d31b8898ef1e43389d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZFZ21946229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31de49e6c90e70ea1c607189cbb72dc20a2d5fdd166af0483b75b1d93550dd7. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZFZ21946230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea7da6db521ae343336f316e566026905662ed22c7c3f71700050f64b5402ed. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:52:06Z), 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/QZFZ21946231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9325d1f22ecb3c2e9fe50cf67ba9c4dc6ba6ff683c8665ab2468392f8d35c355. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZFZ21946232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67decb8a9b91233c6108ffc22c55cd708dad2d4033008c316f038d2bcb561287. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFZ21946233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd3f25a453682eb79b22ae803e8ab2df828b63e2b7eaeb73dd0daad83ba04fd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES92279031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbf89e57d4bea7ed9d1176c5c5efd66557674638fc09328576f991edb17c117. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZES92279032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cea66695d61cb37ef81a27d77a644e53ea47d7bcbe040fe3a799146098913c. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZES92279033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01753ac0b0a894c3e802df116d4ec3dc3d75c2da7c4fa382d6501d573a62e955. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:27:24Z), 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/QZES92279034.