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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 0xc592459982aa7581da819e476e41a71184c9279ec3a76b3adb73c8990cbebd6f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a2c8151-cd4d-4ebf-a981-e13bb5c5f777.json and https://artists.proofprofile.net/proofs/artist/9a2c8151-cd4d-4ebf-a981-e13bb5c5f777.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 0xfb60f89664041f6bdb1ebadad4b6e90aaae4639723c5a1076f9a25bf83830b85. 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/USQY51285509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a487d1f90ed0190fce78e45a20c883e0e3866ca4169294d23356d91932e9b9. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USQY51285511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9845851175225710ef6bdd9aeb46c3d699659bfa11a2f39f1d5d0c07db655eae. 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/USQY51285512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699631aa6718015496caaa3382b025ea7e897919a7bbacf19055d6476ba1451f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/US2641011601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55300957550c3cd61cdbb87946e8f1df7f804177570c5880bc596f5263ffae2. 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/US2641011604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a7af923db88fe8b8d0fb29625e5df686e23126acca9d8838b811f9c438a109. 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/US2641011605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88e9c1c499c1c536f3cb465f38a59de6a18e09870a3577eaefbb9f810a4d876. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/US2641632802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9548cde5dfa33d6dc3b5f26bc9eff21f4d8330a6d6d28bfa751cba5eb32c00ef. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/US2641632803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc87cf2b952d16356618324942d8e4abebe46c5794126cec534afb3df3f421a1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US2641632804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4a2a80bd130722608f8762dcf75e8e4b345a3a1f6faa659a7a225e382c6358. 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/US2641632806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493ab4ab596cd5364d3597dfbb01ae74e56528d148ff5f3024dc7742240fdb53. 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/US2641632807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48abbe982ecef26ce2b02b5fbe1138bf7a465bcd22d95fbaefe974daba261b2. 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/US2641632808.