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 0xe3048c844ac82dff1536922ba17a18023c051049c7574272c67296ebee73319f. 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/da9ec40e-d454-4b85-91f3-39c72db87776.json and https://artists.proofprofile.net/proofs/artist/da9ec40e-d454-4b85-91f3-39c72db87776.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 0x9e7c85f2f11ed1af8e5a4db843cbccd89903fb815a812bbdacacb977a5fe7a26. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEYX82238934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9691b1c2f4b97c88d52a50577d729620b94da4e2894200b3d48fbacaf3e888ea. 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/DEYX82142255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a66f0b0caac138e27161394cc1ba26df5e477b3f6c4bbf8b846acede06f821. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/DEYX82161032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7788ea14ab2b748784f1d04430eb8d76c3b9cfcd649dfa023db2db12cbfbf4f8. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DEYX82181241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd1de1e879c268d5331855e6d31e0d065923cb408553f9546674e796c435098. 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/DEYX82199237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7c85f2f11ed1af8e5a4db843cbccd89903fb815a812bbdacacb977a5fe7a26. 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/DEYX82238934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c47a174f3d5e952e64372e56e837ea8ff927ab6216bcd986dcabeda5ff72d44. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/DEYX82218091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8163fadd2ffac600480b3710bc7c2968c2268ae2cf3e31c84fd89fd2e75caf. 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/DEYX82210398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b05c8df43701d2e54cfa796b9bf625e1b1beb871655a40472cf7b833636bc6. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:46:24Z), 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/DEYX82255766.