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 0x90aa4a065d4a0e95169b3903d2c124fecc32c8e75c6020e96e4b3581975118ad. 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/cb4a04b8-b45a-44bd-aab0-25840ddb7765.json and https://artists.proofprofile.net/proofs/artist/cb4a04b8-b45a-44bd-aab0-25840ddb7765.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 0x189271ffea764b92ce8c11e7c7c5bb9006e9fd91aa61c7385930c5db3b242dd9. 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/FR2X42209591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314f237a119be6cff6891a304102a07dfb31e994292a06e9cb9f0278bffe9775. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/US38Y2415170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98bd6e6a1797b2813a2ce5e09740b878aa9bc26c146167f1a5338f9df50fc41. 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/DGA0Q2438358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c2b9e44ae6b7b66eab27067e95f4347e3a0923a105c0a2e6219d10d5e030a4. 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/US38Y2430703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53b8a595c3c813d497774a349eb3e1471983e09bed00b13203497f14a053c3f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/US38Y2430704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc5b86fe5c9adf94093e32b2ae2a2de3fd03ae65606aa17b740556c3f8c3e73. 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/US38Y2430705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ff5dba2fb08489b82c8cca9397f015d891749e814a88ec07b0a6c2f3302761. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/US38Y2524120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51896130bce53a613f4c9f4e850722fbfc8b43076bd4d798ae8a9d2c5119adb. 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/US38Y2524121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd56aa149ecae7866f2141eba38a0052cf9facde8d95245c327f0c75a4c86dca. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:22:10Z), 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/US38Y2524122.