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 0xd0fbd139d5e2fabdbfbb304cf00ec6ff1b9ba5fa5012ed5b40afb03c38924480. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20e419c7-062b-4f05-973a-17019f1e7af4.json and https://artists.proofprofile.net/proofs/artist/20e419c7-062b-4f05-973a-17019f1e7af4.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 0xf655d475926f28ec1f8bd653b4501cd31be802f5884baa84a6b05a4a259d4758. 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/QT3FH2568443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298725f57586f0bc201efe1fa98973834089015bfbfa81ca5d413835082c6261. 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/QT6E52505809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cca440ea5430283a255e5d0c48b4f792e06bc44feb3315bf7cbb1544475dcf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT6E52507647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20037d7bebaa85ececd6a7d5dd7f3229b241b99506371486de30306e45b78856. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QT6E52507644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa185d7761125ce150b1d984ee2552f30142ff4822654057b32acf91ace951ad3. 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/QT6E82557323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2c07a3f904ade433ab999025214ca3ca17ebd6a6ae49c97991b99c3ca57ad6. 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/QT6E82560347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1706dac97816e06675a8811dc0ab394e99ac8a7fa7decebe8b0dbe5772a3fe0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT6E82560345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f94a9617612dfa44b83f96ebecb2c7c23508739154f4ec77aafa7c3a873aa7. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QT6E92535356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edca61513e513ff22f2e5bbdf3081f96d110c4371cb3bfe46998d2e9bb2708a. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QT6E92530466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bd5037cb37f02f04159c4a74950d746d6744688b69f9be13bbbeaa6134b5b3. 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/QT6EA2508002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d4ae4aa9aeb9c3b2efafcabd6a1c0e420f463334c71f3d3429137ebd7b707e. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QT6EA2511294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2737e2e77ec07ac34cf90fcc84aaced8a418286898c2817e86c3919d92b9bf10. 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/QT6EA2507895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68407f7367c1bc91f457c05987ad09c70163b6234da1ec83653df66e528b7383. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QT6EA2511293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e75cf2ee705f1441bb88258f466a3c9ba2bb373c9b4e0a57ecfda0e5997d5b. 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/QT6EA2581367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9f5cee6c3ad0a4df745831ca4126b7f164fcead0786070dbfe126d8573b0b6. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QT6EA2581443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edffa45840a95d6069d1ff24fd63f358cf6b245ca2f282d2bf6c01a421cc0fb. 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/QT6EA2581568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1368780b0ad115d3992bbbdd6105c5ea199fae7ccbafbab0ef33fad64882d265. 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/QT6ED2536887.