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 0x591695ae74e556ccd5d1b358425f63e6a4636eca14b5bab665f2f90051ce0b54. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97c8c843-7e33-484a-8a2b-faa300ba811c.json and https://artists.proofprofile.net/proofs/artist/97c8c843-7e33-484a-8a2b-faa300ba811c.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 0x63b4a9cc31509e689623e4e5532f09ae270ad9c9f8f558a4a9b299677d9a80dc. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZHN42539846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbc1f2937dd6bb93fd31522c2de90a9022558c1376eeda1c1268bee263307d8. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:00:00Z), 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/QZHN42539850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a04487f9774fa423e4dc5927671ffaffcf9e2071363ac79a0b4890af81fd15d. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/QZHN42539852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0c99f8b4bfef2e1c25b4daca99c5209477921fb5c3517e51d087ca30a2811d. 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/QZHN42539856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6c4598b32867ebb40c50aeb393652af5a6e3c88d68728a6df84b02f863e00c. 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/QZHN42539858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a8fe94d3cd2c623844039506b81845a8145c2490edd819ee1eb7df8001de2f. 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/QZHN42539860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7f725509432fd6d59ab15e4a2aab4146ccf1ed43f5673c7b9257ce3034303c. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHN42539861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838ae5d1e690c6c48bae66cf3580c214ad75e84511d82308bf57cb0615a8fc84. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZHN42539863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b8729c273740eca730b90a0855e86c8eb1966166d0c3767492c11a508af785. 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/QZHN42539864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef729ec6f7df1ed95c7c169bdc258846e95506c2c3b167aa088717314d0c360. 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/QZHN42539865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d95f81f4aa32acb546a602f619f88cd4ed50e504baee2d2241ac546696a06c3. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:36:22Z), 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/QZHN42539866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2f6cadad2c253becac3ebad4549cda75d0612c5cd78181665ed1f558e71bcd. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZHN42539867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2949faf36a852d28e8264a0a87c5233d4669c452e70dd24a447929058ae67d2. 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/QZHN42539844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141e9396e14a9a1bbafecc79fa800eaee8bb3ab10934496d709d5f5186c743bf. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZHN42539848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8af315058de7faece96762a7d8407b858745752ddfcf7badae24ce57421ec03. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:32:40Z), 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/QZHN42539854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368b41dd70a853b941eb90d47f879c151ff8c9369a6fa37e0dc1c3caeb726897. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZHN42539862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2f6cadad2c253becac3ebad4549cda75d0612c5cd78181665ed1f558e71bcd. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:24:39Z), 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/QZHN42539867.