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 0x1ca6bb4edbaefb3089d63f2567a60c74e030835ccba88af259366389d0b2c2a4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c74d6b7f-1529-4ad3-9f0d-c0ba17be83e1.json and https://artists.proofprofile.net/proofs/artist/c74d6b7f-1529-4ad3-9f0d-c0ba17be83e1.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 0x68b962204280e19ea70229d3323b2f469fd6bee996de99ec3fb155cb6e5d9a6e. 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/SE5W32102796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372b8857e1eb761203df6463970e499c821cbd954a22ae14de179c6a083461e1. 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/SE5W32103843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba0a9c8f800fe4d47ebad20a3a7ab9d6179efa28269f3f6ade44eabbaabdeb5. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:49:33Z), 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/SE5W32103844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef431631104aadd95eb997308d9455ff3e1d415f6b80c752c7098eadb5b3143. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:01:04Z), 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/SE5W32210541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e37ad1ed9c883be490972a3eca8afc19495dffd3638f0f1f8bca1e777ca28e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/SE5W32210542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b3e5607b9c3334af4911fe09d6b331c7194f4714c32eb3fc9488bf22870bbf. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SE5W32210543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5724f30eb4d3b5e4233fb9e2502e4eeecefd21ef6c791e9a7cd16e4f82813b3e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SE5W32201428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135fc89967ddeea5aba81d348eb661a06ce2e29527013a499d0fdfab1a156cee. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/SE5W32201429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb8e44ed5b48adb6e5904adf8788a6d196a5d4d40883bf1934087863976e8ad. 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/SE5W32201430.