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 0x8c681c98cd085068d3cbcab1ef84e5c83fbc48c11fba4033949723aa60824356. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5496295b-b528-43b3-9c8b-bdebbb0f7aec.json and https://artists.proofprofile.net/proofs/artist/5496295b-b528-43b3-9c8b-bdebbb0f7aec.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 0xb999d53478207570e4b41f7be3cd9458dc887f5c4f92db40096885a8658b0cd2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZNMY2427132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132e927c5e32d88d85abf2f0b1c2ae828a792315cfe400c5b12b5835d15dc6e6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNMY2427134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5e08f6839154789e6fdd6c0b232aa9571e90cba91301ba15091c7be4bc22bf. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZJG52553704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96d417cd76d9e64e7aa67328e8400ad0a6aa74db53d73aa9ee2487eeefce9a8. 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/QZJG52553705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a09bd09679bb4906d2038a5821e40635316af80800d15f4d9cd1237ea35733. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:55:13Z), 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/QZL382538945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1f2ac1de68457a261fed0838eb079c214f161eb1d27a6de8c89294edfb8135. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZJG52553706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe626d2aa28f85e2bb474a991d118ebfa889e3a007d690ffabc23a64d69cf2525. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZJG52553707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefaa6d39f382ca5893232c1af0692b779e301f5aed190908586e914b1bb4fc99. 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/QZL382572169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7b3e6896c7bf85c2130796b24e53e176adbafcb2d01bc0aae9218235ecbc84. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:29:39Z), 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/QZLL92540050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0eda55ef4a94c6099cb0e8eff80925d01544c4c7174d756ac2da4b9ebdc485. 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/QZJG52556191.