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 0xce3689a411b7e1d2e9b32bdffc2ef909ad4dcd3c669745a606eeab11a1ee6dd4. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86c70cdc-a147-430a-824d-4a9895fc0120.json and https://artists.proofprofile.net/proofs/artist/86c70cdc-a147-430a-824d-4a9895fc0120.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 0x63087c4b7b57b51a886b601ff57c4a2a5acfe4e65d50f266cf3dfe0d6588bf71. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/SE5XG2254204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb312f52d3f2dcc7132ff4801a98206ddd07ebadecd63c40828c1a49ba7e109fa. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE5XG2308107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfc35287ccd6afdcada840f506bdfcfd3ece25428ce381411bdc023171a00b1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SE5XG2317420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68300e7d854b9767e3f59f7361e6491f902ad09cb47cfb9669bdb90a654b2cb. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:50:37Z), 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/SE57V2331401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca9d6539023ec44dd731ffe2f470c1f4cdd29e0068b7bd131293ec4924f5260. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:03:51Z), 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/SE57V2334201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5726420d891a3f195962108beef24555dc33e93142f3adfe35e2528f959c58c9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZX8H2352618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fcf5f4b71e3a83a262158e776ac52c3e12aade34246166bce4521a7d8fade6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZX8H2368309.