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 0x7870053b94b532a8e07e6b78927f5e5163197a4d186f9e80b03a8fc367dbdf87. 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/4e69e706-ac32-4cd9-b88a-7e4399461a9a.json and https://artists.proofprofile.net/proofs/artist/4e69e706-ac32-4cd9-b88a-7e4399461a9a.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 0x111d9c28faf8785be77c4215f3e4ad29ca763c22c364d2116f5bd798759bd233. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLT2H2300961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902699df144666f58603d5a872d50674997e07bb012cb48349d7d37fad60ccb2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLT2H2201067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ba44a8f8dfe2171e742b5002f81d5543fc170d66d266168e2f64d081128739. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLT2H2200566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6bab54a1698aac2028bb86ea0dcd7548265ca270bcb0d711f73cb9f8c9b2c0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DK4YA2273301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612a3287daf90457220c731a9c3b177fee44fe027499b5cd6a5f430ede7acb1f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTBD2425972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f380085da845e4402dafb8e28810d4fcac8e4ff1e74342affed0091e95489c0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDA42455520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13eadc3d5559f0f9ab7202604ec5780e9aacf46af83d2f58a0e493ac4762a9e8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZFZ32476540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfeabce8129b31643007fd8882dc5fcc8c683eb68790e2c3a4360baa53f37f31. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFZ22415761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5fdd43a5a97b2fcfa1a5bb8ae677aee3c622b6b23723821e745702c0e2b22a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZFYX2497423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0089bf24f1fb82ab69e4f053d7b081f405ff591e1303380cb58dca2a61dddcf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTB52326191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eea90505eaf540598477436299b9e49e3a7aa7938a7d1c52eb0c4fc8193561e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTB32340776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685a0387052b201198872d5fec7417fe350629e8587082038ec69c43a594a65b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMEM2307104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc765e5523bae476728f3cd12f0d6d0e33f519f79b6b213f3160b5e32b8e109. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN62388643.