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 0x256659631c03d8c235a035d776dbac5b778c0f9adf5d2b46b7fc6cae4c40a717. 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/d6d3dcb2-1274-4640-88de-d08f2382a1b7.json and https://artists.proofprofile.net/proofs/artist/d6d3dcb2-1274-4640-88de-d08f2382a1b7.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 0x7f8d724b427748f3e5f0a6257a95aec28fc339563cc91ab3811ed5a895917259. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/FR10S2039887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03de6f36966743dee6264a457eafa3c28d48fe8ebcca10a3537723a060e2655f. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/VNA0M1908193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d56dfbc32c3b0c0b130b8cec3b479badecb69231d4633b3f4876fca10f01224. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/VNA0M1908192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa985179c1c3faed9ad7f33735eafb7c093744561eb15d163b1137cfea768ac36. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/VNA0M1908095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0777c8ceb8606f9d9cbf56f015ee7bfa5e709748175fabb294728f37ccf994a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/VNA0M1909377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba18c993fe14769f26f4494ffae4f833962e3c003dd0d76ec8b1db0c36eed217. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/VNA0M1909378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e469960768a036dec2f846e0f5fe42ed19eca347502248389e843ca9304e2d. 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/FR2X42408677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59a8fe4731ca40d1f43a41cb7b1b5288ba07a29160c6c07026f085c0acab2f9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR2X42408678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bbce3735498c42ff1e6d235033d86cb8bffd48c5e751f9190a9763b0414ef0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR2X42408679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e20984c5948e6557a030c19a0a1592d7bde91f4bbb78d86a8d7d6452ce7172a. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:23:29Z), 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/FR2X42408680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2898a0207d773150638b92e43f8b3c603b9e9cde53dda0a21ad6ada2421fe7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR2X42408681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079120a90d214c993d9d9cc7808f74ee630f10b951684305404de5155714c83a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/VNA1M2403995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe72f55b4a83e1445c869959b4fbaae96078f16feae75654dcf4b9ef7d52a969. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/VNA1M2403996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92393d474190006e27f5deaafa0e733a0921016c218e9f9ba338cdfd047d434a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/VNA1M2403997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514c2d225defdc2f15dac67cdc2be0a13ba70e0d7b7e8c2664e14e9318b1c98a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/VNA1M2403999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1864ce2dec74edfd9a90ee1660df2540ccc2e296200f95ebb22f7e32a2251192. 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/QM6N22279540.