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 0x7f20aa5e78230e6945d233c0547229b77ae5fe38473ad7647a1a78f270a64d84. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eadf0904-18f3-49a1-8e45-bfd7e343b606.json and https://artists.proofprofile.net/proofs/artist/eadf0904-18f3-49a1-8e45-bfd7e343b606.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 0x33523323fc2375c9afd4face8e738f8e00349e3022c5b4e49e82390503e9bf03. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/DKC0B2400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba964bfa4b4ca60d53f18e093f13afcbc33291d282ebef1bca32c6c50956c393. 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/DKC0B2400202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a57ec07b9597ddd33623a9b3e4ae3ea4b2447c008d6efdd6fcc81d4cbfaf40. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:37:43Z), 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/DKC0B2400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168bf340283dd51fb808318cc6d104a7d6f8a570c00964307d1d4dc58ad752cf. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:08:57Z), 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/DKC0B2400205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3bdcf755ab1b7567d6c16b1b8be78dacdd2efd0d50e4a92f42d774751eb663. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:07:18Z), 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/DKC0B2400206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9aff615bd1cc9afe7ff42c4b456518cf32130f1556aff569420d84dbd28725b. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:35:40Z), 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/DKC0B2400209.