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 0x25ce2d3960a0530c6a2ad43b15d638bdb3dd08bd398bbc98ce3ed99fd00bfc7f. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de898f1c-7bcc-4b89-b1f2-c50234a966fa.json and https://artists.proofprofile.net/proofs/artist/de898f1c-7bcc-4b89-b1f2-c50234a966fa.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 0x29782d7224d0434b2fde2341757452e2092b86be1649fc2fa79578d88ad1c6b7. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:29:52Z), 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/TCAJH2516624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05878fd566317307703188096a6cc355d464a24676833dcf1df42e2c386172dd. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCAJH2577695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe55ea0815119b30e5ff56f8d0d4977f0f945e9678713c5320c35c27c5652891. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/TCAJI2552390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67234ce8a541593e020b0bb938c9e25de450c5db59c200391fa1c4da0eaff6a2. 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/TCAJM2561417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e791af42b854b31a2d331ed75aa26727168016306426f46425dda22ccc10e7. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJO2598143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43f0e15b2036d51ec25a29970023bce7a3a810e11cf52f585e4c511f131cbd1. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCAJP2549008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfb986326e7d14e8fdc1289064de4dd160f2686ac66229bb57564ecd2c46091. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAJP2556786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2cd945bfb75b12e96527309b7b800da2ead67ee87b13d5862f32f02ce678f4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:52:10Z), 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/TCAJP2582630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c5c9bf7f98615cd631de3bc055f95152186c6e0ee6dad6726cd548279d09f3. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:41:18Z), 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/TCAJP2599360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b960aecf18d89cb67aeb0a0677c6c46d0a1e376f68f78e25cc2dc6acd034c7. 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/TCAJQ2510654.