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 0x91d5ca0175b8111de46af9660cb164f0c615e2dfc41439a740a0c60f18430c64. 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/633f759d-c183-420f-8a15-114d87b20219.json and https://artists.proofprofile.net/proofs/artist/633f759d-c183-420f-8a15-114d87b20219.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 0xd0ef6770f11924435c10e832bc7e4ae27f4666618b86a6742f320d557b10a015. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:07:10Z), 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/IDC302113756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ac514271774f039f8b6e7e24dc22abe6fcf70d9bb9dd3840c5d16b71e6dabd. 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/IDC302113746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23493831cde24ba4b8d74ee79cd025e9927611c5a65660d120e06a4a8a679b34. 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/IDC302113790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1c89900df74bca44e94d647321dabc7a2a95976f17a75764740745b5206f3d. 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/IDC302113833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ae66e23d6f9b32e58f64f3d944dd6a25b1b60758611adc20ac207d17ea25c7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/IDC302113877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03c2578dabf5b598e679d3b401fb68cd3302713ba3b0c0d8adacf166221b061. 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/IDC302114109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66808e76d3033a9be73c262d8e3d272b0b138cd64fff0d230e60dae9a919eefc. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:51:19Z), 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/IDC302114168.