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 0xd32aa9eeb5c186b1fb560bf19fe8570be05a09d5a5a1ab2feae84ecedef798e2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89389e01-8867-41c5-929a-01da8dd0e589.json and https://artists.proofprofile.net/proofs/artist/89389e01-8867-41c5-929a-01da8dd0e589.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 0x69117641a3ade4164dd899f4e8cbb4f3946a66548d8c4974ef2d88dca253a35c. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:19:02Z), 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/FR10S2273668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4f8fb27beddb1a37664f9e4cac74e45ad6e2214d08f14308c09b489abd335f. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FR96X1931073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a2949ccb03adf596bc77f6ee1bf48780c562912d8696639f7b7ec0145246bd. 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/FR96X1931075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3505b65c055725d872af3eb3df0ea03818d3f867432bf7cf7bccdb3740f24884. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/FR10S2258822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6019eceb90bd10530a7b48f36e878da26f2ae81dc8ab403c76c5dbaed98fe37. 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/FR10S2258823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc7debcf1853624281b9c1dd5b4dc4a1e526bf870b58c0f23c8f99a9a9780f8. 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/QZTB72278920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17ea37b2847084e493cfcdf6caad18535df297f9ae72ce398acb9fd44814c9b. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZTB72278923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda6ccd3da2944747b19100780f221bc76cf58b0c9f7d9808166f08f4fd7df59. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:52:59Z), 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/QZPLS2426960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e49e3f9d073d26a3007f1f3f75bb75e6ccce45463d7d6addc5adee152b90607. 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/QZPLS2426961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8276eaab59420e91caac9c11d09e97bdb840b616e8e9c1dc46973a4ccb54cc. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:08:34Z), 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/QZPLS2426962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1ff30247e4221d536c9ab4f2cad2d06a0d75dc0cabe36a9a0fcee0aaee709f. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:23:55Z), 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/QZPLS2426966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e93d9e868de659a216c38684bd3029bc982027f293dce3180d2b4e5d07ece0. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:28:42Z), 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/QZWFQ2481513.