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 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 0xcb2489917deb6596d0458a4d6c17d4a9b03f2e2f9a61a6d7723f232373a9c441. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce526793-91b3-4a38-a406-04e9f812ec61.json and https://artists.proofprofile.net/proofs/artist/ce526793-91b3-4a38-a406-04e9f812ec61.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 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 0xd3a4a64e7ad082d7a6790b02342447b24db355b3838298e421b4ea3393e48e16. 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/US83Z2494817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2b7386d3a26a2c2d2a0b6f916a4c51e2da76623b44fe34ce04585e50e1a5e3. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/US83Z2494829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bcb3a383b7720d08bb3df74d62eac8affb72af723dbbef9f840b040b5e56d3. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/US83Z2348333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0b457ba912a97f272862648ce06533794db2db4244058ff289ba98723d5f5c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/US83Z2327810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b570016987d85342c3e9e3ee1dce827c4362adb8f05321413a33a45b8d69fe7. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/US83Z2307287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c4ec4dbad34cf7a6ae5c979669f6ae5f9a32d81bad9ff05cf798a63e2beb07. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/US83Z2212048.
Life Oscillations (Yuli Fershtat 2022 Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8918681804c0e33519716c7aff8b067e49341923e8884128dc56a519f24364. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US83Z2212046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85c55c4b96c72fb7c7dd53b1e6a9c0c40c0912a2eefd34df176f39d1623cc95. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/US83Z2212045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d792aac9beb005a44cfae17d8e7a64e50651108cb6ebc728a514cea029820c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US83Z2212049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6a0f549510e5785e8b8b5588c8a55a652f592df2b8cad6308d3c22a1e5707c. 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/GBLV62006263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075f3b181857e14981c3e641d62e838b839c0aab9e5593c8f4b17c90bb921d38. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GBLV62006264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093de3987f1b06b1111d52e572f8863b1049774bf45845000d552bb343f25655. 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/GBLV62006265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf773560f8939392ae56a785e5757f6d45a504e67fc9cd813d1ef84eb6fd80f6b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBKQU1882852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f1b741e270c809be53545f414719d84a735d5ed04436569ca66b0e3985138f. 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/GBKQU1882854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d16bb48455a73a0d4eb6fb83e67d027d2495b0aa2df59adc45b16eff75a07e0. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/GBKQU1882855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ceca4bea57ee4737d61bb62ff603310d2a3deb4c989931c80043240e2c61f4e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USA2P2104667.