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 0x04756d726760e97b1bcc83ddce55e0d81f44b1f2d63fac84bfa5f8a1e0c13ff8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06827352-f0a1-44ba-abf0-59b0c2a8525d.json and https://artists.proofprofile.net/proofs/artist/06827352-f0a1-44ba-abf0-59b0c2a8525d.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 0x5d4942ecf978d8b63a2d8118140dd01b5823109929233bf8fdd240ca76171874. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFL2355418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc79f92ea1034f7fdf4d656e520231bc83d4906a1fbbf9ba7f17d82669036ac. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFL2355419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d716e89d32b3a884490ffa7cc70deaf04bc5e512f909a6571274e55ff1a1772. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZWFL2355420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93313e3b24270d6e1d2e87d1f76496f00e94aa6854cc9fe1cee4c18437fe431. 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/QZWFL2355421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8ba0b54168159359efbc9447d24d8bc66f810ffcf4b2ca0ee8a21db6a441cd. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZWFL2355423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4163f7fd2e0ced06dd4e4aa3aad612807c6a992e4c153e9f711decce30ab5d3c. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZWFL2355425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b02026c93fcc562ee518a935a0f0cb38c5f0c3408ec17da0b769f93d63e168. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:12:15Z), 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/QZWFL2355427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e182cf88a43769dcfb80a00b1f16b8ef1a2b204cc3199e61052ae869713c0b7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFL2355429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ce2036241605ae80b3373d0ae6d91a453f779e1ef82d55b5803cd38f964c46. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFL2355430.