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 0x41065cc02cb293a8d003e8882abd70b79e3075d206cd178f56f63096cfc18cdb. 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/c758360e-20ca-4c5c-83a1-fcc8ca2d6446.json and https://artists.proofprofile.net/proofs/artist/c758360e-20ca-4c5c-83a1-fcc8ca2d6446.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 0xb6b89a2637ee1c326127a72b98c6f54b72a482efcc01231fa6e82113120f65c1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:51:25Z), 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/GX4R52248615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be8d4b75dc32d34a37e59016c4368cc2ff1bf52767d95ea36aba6da839635be. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/CAHQJ2211161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32297385f266afe1fbbacddc73e958ccbbd893dbbc9f4055b68fffe6fc5c5ff. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/CAHQJ2213068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6048c32c428dcc308c6f125ea19eebe0fc32a7be5a917bb8fb394d3162b9b9d2. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/CAHQJ2211263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44df0344848e2f66eaf09163bb0718709c960b629aeb2b782135269b5e43757d. 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/GX4R52257657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf4e4582e3de5214bafababb8738dcffda003b928b56249393afea7ee442678. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CAHQJ2285037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738f5c44563082162c4f11c2144933d69286e616789fb4b391b8b1ed9257d83c. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:42:56Z), 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/CAENV2255347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08119d9f830f47fa646f003688ee179f3b1d343c31dbd4a67fa2ef6e2de2389. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GX8LD2240357.