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 0x0525670128df09e5c1868fd167fb1a904e8e0689bedfb94b34d2b38065e653c2. 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/7a0c5c4e-72dc-42e2-b9d6-3f3c76fe161f.json and https://artists.proofprofile.net/proofs/artist/7a0c5c4e-72dc-42e2-b9d6-3f3c76fe161f.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 0x9048c389b4e6741418f93b774835466b673a0d5aafd62e45222a29a86139fbe9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL4YD2400154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3ef9ff61288e5e7fd40e0727e50df451d4c5c637f9bac898abea398f4d8b72. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH7812407322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766df7f1cb02fdea621e1053801a83ff8b81c3233496d38e3d950ac9b3ca4005. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CH7812400973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97560e24306f95edba0ede0c21abb789d82ac68dba07ea29acee0a3206c2172f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEQ022384074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25456f078539056ba98018b69b451613fb7f00787ae03737a108e0ef1312b5fd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NL4YD2300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c08918c75189bb3fcc1e5b5450840b0d68335d3c1db11de0f5b9a6bb475d7e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH7812357842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0f7addd5cafd235f430eec6c12203c5b47801d28a93534f34441a8a108483b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NL4YD2300151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446f8667e4a5b99aa893cd29d5b23183d59051effacbaa86b8a2328e5f563a9c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH7812353158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0bd5f420a2f8957892207113277a658076c2eb646e4a28f8d810825d21c813. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM6MZ2463255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad9f7558b99046dbfc7c0ea4e383d09d54ea0c8e8f4c8810f60bb91c108ee93. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US3DF2420470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77321ccef8e50034f9171c05a98f5c3325661069df84bab4e302d37e3a6c3162. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM4TX2450041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5430d346dc5ed92e139f07be4a9ab8dd21b0c89fb5eeee8aa39224151ee40d3f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL4YD2300173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9fc6e0fca1bb2d00955b41250ed05dba1f9b110ed9e92c9a848e2677b6eedb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMANG2206799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac597d459fad36cebfc445cacfca7e5e5c592e362fef3e0cf9689c393d03a275. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEQ022390083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78276f4c30969de0888e66923f9adc4696acaa3a259d5c4854dfd84531b75d4b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEQ022390084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2403376dfdb7225bde6a52262c9496c5780c694ba31123d31009c5eea2e9adc1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEQ022390085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac597d459fad36cebfc445cacfca7e5e5c592e362fef3e0cf9689c393d03a275. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEQ022390083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5d9ebd882df009ef02bc508559d583074be71b2d9d09c61fbc5b1839b724a9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL4YD2200187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6c43968d7edd8ff23438d896758037ffe81161082718678d4f766cedbb71b3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEQ022272753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a89c7d9fb6395506ec0a6b90dee53337d435a49f2df767ba41444de9bf0afa. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEQ022281820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82aec876610ee31a0c77cf896510291b537f3461705fb3f555c050c15d4c4e39. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NL4YD2200090.