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 0xf7c9a10fed422c628b6e5b13c6d75a848c75a360cf7b9f334155af11be881e07. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be340d27-65c3-4e34-adb1-b1cd6fe080cf.json and https://artists.proofprofile.net/proofs/artist/be340d27-65c3-4e34-adb1-b1cd6fe080cf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xa2d2d0699ae99c64ffb71ab4d8ed2c2ffadf3ae07ed1eafd3f6c3ee2c8b4fa39. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEAF41700100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077baa5d33c7571e5203b832018a55fa156f83608a185c7494ada18852e7722d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEAF41700101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fb0b2faf18697c72922b3cb9009a3861ec1dfdcde1da76aa6753d5641a4fd0. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DEAF41700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd459c0330468f81ded9a3f2af9048fc938b491b8b7944842cf076ac84c2a11fa. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:57:34Z), 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/DEAF41700103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295c66990b2ca6857cc7837d5fdaad2f4ca729194e3c4af6259df318375c3f52. 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/DEAF41700104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3d18ada844d66e42586455dbc3be0e77dc99f3956a6c37f27cf94685e3b235. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:42:10Z), 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/DEAF41700108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9e985dcf6fb1effe8636cf14c5921ea6a68b59d3de6d9a2a62e701ee029414. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEAF41700109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759cc5c33749b2200c32280ffcf87ed8c2cdc55ac2b619f576246883571c5ae6. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/DEAF41700110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcd88f28b107aa5f6b8f6186fca1b3d95069dc731e1c372067fb41ae9fb74ab. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEAF41700111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077baa5d33c7571e5203b832018a55fa156f83608a185c7494ada18852e7722d. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/DEAF41700101.