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 0xce2183c3a09d1ba016c269ab77b25300533a0477b584de3e4fef21421154b1f1. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ff6a377-c044-4d75-a61c-4b0522d9e5e4.json and https://artists.proofprofile.net/proofs/artist/5ff6a377-c044-4d75-a61c-4b0522d9e5e4.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 0x856cdf0e5e47fb8b61d527c37938b71fdac7278cdc1272ccd1fdea57427e1b91. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:32:15Z), 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/QZWFE2476435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3d7f9344465f5ec8dfec34b981eb2a2b9bf958ec6c0438674e8515039f6686. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:06:46Z), 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/QZWFF2445421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0156f0cd6818bbfe77b2a89e6c4b5020387df3d973cd144046e8f050ad92eb2d. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:22:38Z), 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/QZWFE2476439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822885ef81da4b39a7b077c6252e604b928fcb3b54aab73902377cb01b7c1256. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:59:46Z), 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/QZWFE2476438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bc51d2d38e6bfc26f905b6ff5b3d3f981e0ff659e6b535eac27c992cbedb32. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:50:01Z), 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/QZWFE2476440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea3071b8bca31273df6065a1caeb437216506cebd94bcfb915a927049cc488e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:58:48Z), 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/QZWFF2431393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4889f47e79b21869ddad5b247b5619055adbc4b9439bf19555b51f9f0291b8. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:32:04Z), 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/QZWFE2476433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502f2624f0d422c9fb184bc794f2dcd781926e11e441df4f9ab1722a67f22d6f. 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/QZWFF2405666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacea0d24ee973eff4b57f24c6ace3e4e59569ffae4ac0979e1c9ce28a5abcf8b. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZWFF2405664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6aea617a9dd27e6d3b3fa01e31961d477d67ae44f7c01e9328c2a058a45ae4. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:55:50Z), 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/QZWFF2405673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef57d8ed69241f761d49e6861fa2979312b56741f2c72fbf1bf438ca87199cc. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:37:39Z), 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/QZWFF2405675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a8aa800d74c316a256ac8676665a7d6422ce59fa0923accbf516eee5574e9c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZWFF2405655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1e432a02dbb41e729c128c8b860f91ee0fbcf94654efd89f48dd472f99d564. 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/QZWFF2465832.