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 0xfc3e4206ee95e2ad279153e3fc1b35e8da390b1cd895756000eef7ef473349a0. 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/5229539d-863d-4d65-b133-38047c75c7dc.json and https://artists.proofprofile.net/proofs/artist/5229539d-863d-4d65-b133-38047c75c7dc.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 0x5e72937116da2d58bb6f440d7f36296740743b6c9c8422409895051fdc4a98b1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SE2HL2101202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80262716e77c3d74ee840c2d757d330338ff932419afecaa51e117a544827df5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SE2HL2101205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9702b45db2f26b290ec7d234e2a42210b83b1db8c26b5bed475b7c294ebe6b41. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/SE2HL2101204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060fc541d7462ed0ea7f56224d5874076c02f124017fea23dd9db4a5f83407c7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE2HL2101203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9702b45db2f26b290ec7d234e2a42210b83b1db8c26b5bed475b7c294ebe6b41. 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/SE2HL2101204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e72937116da2d58bb6f440d7f36296740743b6c9c8422409895051fdc4a98b1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE2HL2101202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3761f5010357d7a184ee04210986da6b9e5664188d163f03aebdbf8374d8d87f. 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/SE2HL2101201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3761f5010357d7a184ee04210986da6b9e5664188d163f03aebdbf8374d8d87f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE2HL2101201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e72937116da2d58bb6f440d7f36296740743b6c9c8422409895051fdc4a98b1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE2HL2101202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965f6cb966b9d2637fa9f0d7fdce5c627807ee5edf442502e055f731aec7cc56. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SE2HL2301001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965f6cb966b9d2637fa9f0d7fdce5c627807ee5edf442502e055f731aec7cc56. 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/SE2HL2301001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515f8d9eaacb572abbe6bd9f1f0337935ededb041b8be6f4074029375ed469fb. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/SE2HL2305001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa614556b2b3ae82a6c7083535fbb739369fb0fd2a058976442ba4671515b8b. 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/SE2HL2421001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777caa9157b8c76c681ee626755301e835c20e25a7e262680dc8fd8093f054fb. 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/SE2HL2422003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74687d01ac270f9973915e204bb2e0e07abc5cf1ed9b7b6e7929e54ac4a301b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SE2HL2422008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fa10db5d5b11051441f18c23c15d6f1805fe02644e4100c000b68f10a307ef. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SE2HL2422006.