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 0x1169009317e4961bf36fedbfcb12a6cb7287ce2990d849382d191a41ec673f70. 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/50c6237c-5172-487e-a6b9-bbb21272b50b.json and https://artists.proofprofile.net/proofs/artist/50c6237c-5172-487e-a6b9-bbb21272b50b.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 0x4487d4819e060b99a0011ff5d43f1ffad2f6be66fb2de3c62b9e5fe5ba05efc4. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/USA370667253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61e198d24dadab1a943d5b6889a4a40790e1431c7d02b68d5f90aec4195948d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USA370667255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb2258b27327902be4fb315af3690ed5eeab1f18bbc8c2b9b5954c08fc2b5bc. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/USA370667256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9754343d5529fc16caa832292e6245fa6bfa1e198e2e71339b9ae8d6094435e8. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:40:59Z), 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/USA370667257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9e083f23cf25d160283cf8374b6b42958a74ee629abcd7fda6b5c7886e81c0. 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/USA370667258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8553647126e794319ba06911421b3e613b85896a2dba058f5210332dc433f4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USA370667259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963f5883cef0f235e09aa84f8b676c32e1c632f30e5c8ca14b5e7bb134d34c9a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:00Z), 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/USA370667260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079edb5b7367018f03ebd38261d44dab99076cd3ef3ea1b1f644fae172161945. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QMBZ92310167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7560769ea972356751687cb503c9985f2a1916c339bd7432e62d1488c1a9b5e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMFMG2339887.