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 0x220f8893893f876e07c238a8da18952460bfba234c752629f4f1cf323198a7a5. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d9a2243-8d1d-4381-b0b8-767365a6149c.json and https://artists.proofprofile.net/proofs/artist/5d9a2243-8d1d-4381-b0b8-767365a6149c.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 0x133cecee4c2bc58c654bccedae62613109ae8b5f2a52a1459a59955aaa47dcb4. 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/QZPLR2168255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a3fbb8369ed0afe61d3c0cd23135c1f618b8c5518312202cee8e4ffc049bb9. 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/QZMEN2100721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7860471cdf963e14d50c722baa507d349f5be3f9d3b20b5a7fc3b78d3e03943. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/QZNJX2451290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0aa448c8fe3a76ccba4783d8592d929584017efbb52f68ae8317e69f52eb69. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTPX2470967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433bafb3b6cc60fb2ab48293bb3000d3a9e5bde96acad9d0f2328daca2109834. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZNJZ2418326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0aa448c8fe3a76ccba4783d8592d929584017efbb52f68ae8317e69f52eb69. 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/QZTPX2470967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7860471cdf963e14d50c722baa507d349f5be3f9d3b20b5a7fc3b78d3e03943. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZNJX2451290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e54adc106ce079671499f9019dccb44ff327d97db3c787ce446e61534b5dd4b. 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/QZGLS2517420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0063671afaeab1aa2310eaa296ff7607eaafc6ef4b0547e5df46c18778189f. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:43:38Z), 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/QZGLS2517422.