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 0x2c4a661365f08a1919fe69aba7f3779e0e20449a0270fa589c3d5b6f3b7baa6b. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e492918-50c8-4849-8bd7-05109291d5b1.json and https://artists.proofprofile.net/proofs/artist/4e492918-50c8-4849-8bd7-05109291d5b1.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 0x6557597617892a850eda586feda93cd52b965b579872f5cb22fb58252902169f. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/EGA252405298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb7c57807c4e0b462f835cf925d6b37858f5bacb7b76c80d40df033e8e37500. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/EGA252417413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03c56faeb4b3602ec8cd8b2a836d2804709d218eb34097fc6c6b42540d3e7e4. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/EGA252417412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957b5039d25189e8a96a1639e741422edf3e1e729f5a4759342cffde348f4317. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/EGA252417464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39074afbedb19de25b20bcb1e9aa4d6f8f3fbc7b1312aea3574f0a70945198a. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/EGA252501870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3752211c76479aa7efe4e07ad30a9f4aa3ad9ad2e814c4aad20e4ce72cc22c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:33:49Z), 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/EGA252502199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038f7417cbdd22052f1ea1ae7eeed65c75fd49f5254b67c47ba2d75151c65268. 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/EGA252501883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ef5193606034a0393185b945268c785677a8b9450951407bf67eadba5991e2. 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/EGA252501831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c46a6302ae435a6ce31fcf20abbfc160aed1165305abeae433cb04d9ba4a4d. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/EGA252501881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600fa5b6d53fdeead1ceb9520985f347c4f02fcac208a5665d21a58f93bd4b25. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/EGA252506327.