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 0x251bfad80ca9e2dbee0bf96d685215b1e162cf4e97d04f70da1d5478ba0dc26b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/502be9d6-fa57-4838-b4c3-8668754f72f9.json and https://artists.proofprofile.net/proofs/artist/502be9d6-fa57-4838-b4c3-8668754f72f9.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 0xe00bbaac06250595cad7031d0142d274be6acfc6ad7b79335088d69a5fe53c17. 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/USL4R1807526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d27d5f438875b64159c0e1be7412ba9f73262842dbaeaff1553b69cf59cfe3. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:10:31Z), 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/USA4N2100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8903b5e30e177a9b067ff0de145167ada84a9cd11e8f5f05813dd402ab039a75. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USA4N2100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d27d5f438875b64159c0e1be7412ba9f73262842dbaeaff1553b69cf59cfe3. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USA4N2100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ddef9d6a7432ea239404a62e9c1982d6c7a30b33f0d5ba16ec95931f556a97. 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/USA4N2100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe4c0d81feca0a8a2a3f493ee62b0a2c5115b2955294184fbcedcfae3a86e30. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USA4N2100055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8903b5e30e177a9b067ff0de145167ada84a9cd11e8f5f05813dd402ab039a75. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/USA4N2100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b80a37bfcdf10297d27202296c86e5722c20b5322aa00802efc86438cfef98. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QT3TB2412613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dbd135b6f23476700e1f904cd21381fe88f47008557e0f5ccb7fc15dec2b3e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QT3TB2412617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1b2ea6069e9a4906cedc71f362029d3f874beccb0f598880962d9472b62799. 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/QT3TB2412610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929b111ab58654030974da0969479abc70d88644a588f52aae410e6e6fe39109. 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/QT3TB2412612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b80a37bfcdf10297d27202296c86e5722c20b5322aa00802efc86438cfef98. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:25:07Z), 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/QT3TB2412613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e01a83bead025b5965177e6fa4f4175e9e9f6d43264ee3fbe56fdbb148f168. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QT3TB2412614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8b1ed1bea52ecae370a8c8fe9282f4fa9203e89c397fca99ea722c16b61e2d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QT3TB2412616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219dc05b9367c9e893f0727e087283b0aa7a95c8aca8a27d3957f6c0a2d72f99. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT3TB2412618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adf82b0a22c2faef48c3ee6733b856a09e00731384a8cd3401530a98c4728f2. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QT3TB2412621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee62c5ffd3c193cf8f731fbdbae874ea86d458e5ceaecb406352530f6ae9ff2a. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:07:35Z), 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/USA4N2580002.