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 0x0324bd7e6ce8b65ef57f747c710d4c240c531b066a5b98a89f1c8c64ddb63371. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6bf914c-7eb4-4928-8cc5-abf6603d865a.json and https://artists.proofprofile.net/proofs/artist/c6bf914c-7eb4-4928-8cc5-abf6603d865a.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 0x460571af6a43cda5755238d2dfcd8390347dce8467d4476e3ba456d5fef66543. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USEP41642001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c437a2bc84ba39e7351610b67ea4741e9b175c45c47d4e464108900a88c05b. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/USEP41642002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef6bdeaf9ae403c71909705d91d4be4611ec4715c01e24ec50a13e203e82780. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USEP41642003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c2548b25805b0c65d6a84c490e805a5c4d500e6762fb94c07222d1b3e7a3c3. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:35:03Z), 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/USEP41642004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720e91af53bffa573f90d8a23c9308c4ac2f1bdc19a4f66afde78cd5acebe615. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USEP41642005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81de6447b1822a4b0da7dc029e1ac98ec17b0b2ed9fc7cb4a8317143afab7f8b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:57:35Z), 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/USEP41642006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b1975823f108f35849354dea18c3a0c9e301c27e1703481e4cc18a142074fb. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/USEP41642007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602c518a37f7f7372a20b67086328098d678a649e02475853ceace63dfd07234. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/GBRKQ2105922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3716c36a3948a9bfc18af1072d3fe88501b4dc53a54ae10b200592b937e29568. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USFMA2300212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5d54c55be349814bb70002485cafa8f297b6863c237e4c8cfae10249527184. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QM7282459183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3660c64371d050ea739a6129500e6c9ddcd0f146ad28afa981c53097e69763fa. 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/TCAHR2309659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6789177990959b527d3ee96766f5916d76d06aa940acc43bd8fcf89ad93207b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM7282459185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90652a565f381d29c675d88679dd0a0333a1c5f7e6b0a9b7cb93971ef98aa00d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM7282459186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9605c5a94aa951326310664a3c4fbeb352d288d5152915dfedf5762e05dd637. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:00:51Z), 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/QM7282459187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2caefd483dd0aa969ac792704894b5288549b02045adcd907a95443212fbfff. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM7282459188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3181b84fb318f63be6a6c354e0f615f5d6760130437880ac5dfbdfe4e306cef1. 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/QM7282459191.