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 0x8e781c8859e24fa856ffcc7b69264b68db83e81984a084b3f7486dabbd22e1e3. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2c4f6e3-520d-4749-947b-227ca2a0454e.json and https://artists.proofprofile.net/proofs/artist/f2c4f6e3-520d-4749-947b-227ca2a0454e.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 0x5fda08fa1885fa6af0cfb08b0f8a69f543375416e50e40576cbc69e629182e2f. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZMEM2012511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ce29fd861c94ab8b060ecf0143544235ae4666fddbaf39c32c2a15ad6c2840. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMEM2012512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7693060484aaf95a15163e8e24f077f08c93581a0cd01cdec38ed909eb79ab54. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZFYW2111609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc3b323db6abd1a162d042c00a81711a0c75006111a48b5b09b913c2cc69339. 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/QZFYW2111610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471d9dd2363c155d8b27ace0c41c2e0be4f5ef9aa4db91780fd5b2a2402e59fd. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZFYW2111611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd120d6976bce36ae2aff9cf97eca5c345651a042edd8c6ecb96baf85bba0897f. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZFYW2111612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f3933167fda832b46d8d2a7da5df394a6339921e7759dab2f4b84dec979971. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:49:42Z), 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/QZFYW2111614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdc862bdcb85d9e13ef404b31f9ab2af091bdfcf649c34e2f6ffe03cdc2b35c. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZFYW2111615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396eccaba05a9a5b35fe3bfaa6ca98486ab4a50c20b2f92d538569649212b7a0. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:21:39Z), 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/QZFYW2111616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a33f5137b3b85abeef8dda3bf456a415af64a1cd959afb7181db6d2c247cb8. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZFYW2111617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a1a7307d366b1d5c9f1df6784d3ac35cd0c5ad226e4f5859f546212baff1b6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFYW2111618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c517925dcafc4ba00d576909dfb47f14fa04c031c7a66e0f966bf079b77074. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFYW2111619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e501d2ea7e881aaa4fe937b8bf898c9b8548ef85947fd06f10a0e16715591e4. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZTBA2281105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c556c0d91517c47aeab66304aca6cbbb639b721a892cd5993262e229a84b59. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:00:33Z), 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/QZTBA2281106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11597d9423a75d3f5caa15687bf59b49fe3272768413f7db15623fbbed77569. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:29:23Z), 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/QT3EZ2423287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9920065f72d21e9905a5d4378e0a849bc8f66befd4ebbf5360356fc9c524b338. 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/QT3EZ2423288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711e7e8144a54def6e094051d6977f6a6793185c3e5d6ea2ee943b532ec4cd8d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QT3EZ2423290.