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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 0xf0b3108acbaa3b3a1b4adee201eeee29fec51f1d4a4f75202d81cd28d2955f28. Chain 2 (Bitcoin): anchored in block 953627 (2026-06-14T11:43:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f1ca51f-dbfb-403b-9b09-bb2c71caf028.json and https://artists.proofprofile.net/proofs/artist/2f1ca51f-dbfb-403b-9b09-bb2c71caf028.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 0xf57f93e39cef9ff1385da152b41f13b8eb35f67abca959d4c37ece26e3866f25. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBJX32141503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8b2673d61f8a269d6ce1cb5998ee314d23cd0d8a7a94513a90e20143877f10. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLCK42504787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40592eb898cfa9fa83d282fd324dcddae41bf5117a0bc01b4764ccb7f325880e. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/NLCK42504789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ae69ba7bb164737a8c9bcdf584417aa37270b85ae65771a72d632ef8234118. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:23:06Z), 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/NLCK42504790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d068adde8a8c2116423c2d091ffd964a1e495b129ad9fa49ee2e475befbe9a8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NLCK42504791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fa131bc7726af8dc7bbd337be95b84d9c0cba0648791f5ff73ac7300954626. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NLCK42504792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6910f1dfcb8597ce78683c9cb63005e6791e2226c769d8337e3ec561e7c17f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLCK42504793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cccacce0060538799836c124f93c134bf03d2f520ba5f970f3e6652a7a7d1ce. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:15:35Z), 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/NLCK42504794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa3a5ffc79cbfb58c46af9bd0f3eef69bab0b3876d08968dc6a9fff06618087. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLCK42504795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31192bfb82001b059b15262dc8b302cbd5b05e449576693bd7fdf17d05cec0a7. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/NLCK42504797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7b5ffaaef7c8e55c1a71f4a56f7c4f214be18273b0564a81c80ba3ae20b780. 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/NLCK42504798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf99ec2cef425decc1cf5d81b5c8f1f497794d013578c125ecc6d50a80662958. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6N22422086.