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 0xc7da89ed82b1a4c811a5e4e41fd2fa9ec28e3c38bd931cf61c495638a7a22eaf. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50037ca7-cc60-4dfe-acce-192d1b02de45.json and https://artists.proofprofile.net/proofs/artist/50037ca7-cc60-4dfe-acce-192d1b02de45.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 0xc56ce5a00a4d587e497119d83bc0f863cd877b6aaf55cae96f505b9b16172735. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZYHM2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf322e7a3390ebfd9d3c0e3397c1e11b4402478fad4de91d7d16486c285265178. 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/QZYHM2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc6ffe584ab7aea525bef41d931c5b13420f5182a927f63ce6c63c110684b21. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:46:54Z), 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/QZYHM2500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bfeb77f40a1855234ce33c142ec46d271075dcdf62126b528e024813878311. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:37:41Z), 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/QZYHM2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd352ddb505ac929181e8475b339c2591fa501f71e91638dc2a20cdfa0c986f11. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZYHM2500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086e720474690d11facdd1cf16ed65d5ca48f2d429d228359845fc7c1999fd2f. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZYHM2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d7436fac42e1622a3a0cb87d9c3b2c9fa8d360576eadf4d05dc33e4f5e4d82. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:34:45Z), 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/QZYHM2500922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb284ae58da09706fbddea188e82c3fca53e7015a5655b64c5ac157b03be93afb. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZYHM2500923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f33a825d85749fe8aa44a2978e09eb4d21d0192b1ef7b3600d032559286cd48. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZYHM2500925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e365181c429c23686500d1352024d87a2c3843667bbdb4ba82f4cf481284914. 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/QZYHM2500927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b70579858ecd6e4b22ece7b3c9d6f4e81a29872af1e753a05724215c1973011. 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/QZYHM2500929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00369a3f6a7aff0749850837505f2479f43d1560ca7bd0f058c4c71c520b67d. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZYHM2500931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ccd15155b173b4e0589324a93127ddb7e0dfdd266731c8e2637cadcec92d0b. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:11:24Z), 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/QZYHM2501973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6af13d0aa17926fbe7cd59a856bcded44f59d594656cd658458f345bd22d3b. 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/QZYHM2502431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2970cca1845c750749c11c17c2fa659b90ae786a4df809b801690ad380627543. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZYHM2505882.