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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4854c8f1caf4a5200af9de72e9275960c7aae983ce930080737b84e2fbc2e8ba. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7f00415-2b7b-4daa-b09e-2539beb48033.json and https://artists.proofprofile.net/proofs/artist/b7f00415-2b7b-4daa-b09e-2539beb48033.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Call of Duty®: Black Ops 6 - Zombies "Citadelle des Morts" (Original Soundtrack)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24446ba8df6e48daf76e36e2503a62a072fdd196563cde8451eac91030af7713. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZZEB2441470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9045a08dccc7931bb82d0fd80e36415c8835eb8b3054c770dc2d908d5473ecf4. 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/QZZEB2441476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b87448abb4541172fd58cd71b87f44b492e6a1e4a2e95aa1821601450a28ef7. 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/QZZEB2441480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4988af5d07823d825f8f807297cb22bc02785ad17582813acbc229f12555134. 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/QZZEB2441481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4f99bc8b257b78f339ce69342c1ee7770b63f54bf8aedabb11fdd337b0db2f. 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/QZZEB2441485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16df2a6717df3a5ca67a7a96ab6c157bbd81925b6d31b0f560b6aaa20cdefbd3. 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/QZZEB2441488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8516aff86eb524730102a28f339e73e5d9fdf5d7cda90344ad53583cbbc236b3. 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/QZZEB2441490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d472660b3d85a4313f84ce37259be5b678d5759dca0168574e9c9b1cecc445. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZZEB2441493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97bb2e5fdc2f234f32cb6ac11b232d6ff80a98c5818ab3c67781321976578e5. 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/QZZEB2441495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d32d5479f0ad4a47098f348fe154f2b20d50ffced01f2f6358e1385b236b6e9. 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/QZZEB2441499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27578a22ea4bebc4bc3078e6255aeea51d93eb4a61d4c93415fbc976c5e0d7e5. 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/QZZEB2441504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e98517649700031e11cf382a44af297fa094777186babe50a4fe297af28c93. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZZEB2441506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff530ea7207234491e612a5d5b620d69c0429f7d7afaf1753d7a9a1233745bb. 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/QZZEB2441510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d7441a937fab06516c91e2ced46a8e74d9116c7de2dc11c3cc1abafa5e4d60. 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/QZZEB2441521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab9916e68d87bdeaf14a7427439d12eb1f3135000f07e4d40e9d373c4373cf7. 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/QZZEB2441531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103ed2ebdca0d2ca48e32b7b7792da2f1d66fcfe06225e16615a9920db7ceea5. 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/QZZEB2441534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9a7f79f12610a1160ac6cd93bdac5e4b7f0f55eb464436fb07fd853829e52a. 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/QZZEB2441538.