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 0xde233a44df299759a7abf1cb055a828750ba27c6131d73370dbb5266b42a0519. 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/b6e1ac6e-b5c1-4200-819a-a57cbc03b4be.json and https://artists.proofprofile.net/proofs/artist/b6e1ac6e-b5c1-4200-819a-a57cbc03b4be.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 0xccbeee90c1b6f05ed088100b789aa94f89ea4961c5f461701ad184270e56042f. 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/SELFA1500506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0942fa5987a2c51030109b7e203f5d1901d44aa669c456c0e2dadfdf20a896. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SELFA1500509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3beaf2e3b33fcf55caba38ee31958fd3997b4bb4535232ce428fb09a07c0f5e. 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/DES562512075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3beaf2e3b33fcf55caba38ee31958fd3997b4bb4535232ce428fb09a07c0f5e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DES562512075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fce7a07bbb086a08c81142e19c1ed553ec66cd3ac3101461c4dee78823e92c0. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DES562512076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84e13f1e6894aa9b912b4f0081bfb90a00fb8d3338483bbe17a30bf4519d1d8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DES562512077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34349cbdc9605946ad0d55f364a7cff5772a6d4d813efa59c4873592aee7f97e. 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/DES562512078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d94056e37fa41d30b22a226a1c7de66a4a61f967755d6c977c7ff5fb23520a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DES562512079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2dd7f39d37c30fda1c50b34881b5e0136aa594e71fc17eaa50e21cfe899b50. 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/DES562512080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db3815835db0f73aa4ba7cceea880b7cdf6357c666873edab2f5802e1c8a71b. 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/DES562512082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fd2cf3768c3a0aaefd2cf3247dc6fab9180d83becd531c15a7a410d09a86b2. 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/DES562512083.