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 0x6e873b4ba5692e3f4e95212a1c2cd7b4438ac0955133b229b3b1ca9f1e5ab6bd. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67820e56-281f-4af9-b9cd-6462313c328f.json and https://artists.proofprofile.net/proofs/artist/67820e56-281f-4af9-b9cd-6462313c328f.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 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 0xb5b64e83519b2c59526a5f49ed670b1d68b141e077fe13ae4c5d3a14de605721. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BRVR10800476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e89d3343f51496bef5dae1e6a88afd27ed68aa6db51e5de93359815c1abdf3d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BRVR10900401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30289759f152ecaee42bc2bdf376401db71037ecc00ebbf0f74d9c93ca443a6e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRVR10900318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27858034da08b16063d2e7af176d384174211183cdf918759ecc746fd7b87edc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMDA71560312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44af50ec3719d0b56deace50251e6efb27e5402022152eec5555590b02e8c6d. 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/QMDA71560320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe149a25b2f8a74880d71f48f8f61c74a1f0bbecd3e50e48645ffaa45259b1ed4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMDA71560325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1beff48b19a9c31f0229e8e7d0b6a1e8d8296c9c099337349869120a7c1c0c7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRVR11100130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4758fbf0326e0271f9c09f6b5f8bd4412337ca41da98c7a4d54fd68d191839d. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/BRVR11100132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc40074edcc155fc22b57ea966a42909047f5717b2db9782d30bed53c4307ecc. 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/BRVR11100134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46e2492e4c67c68408cf9ddb26170248950c5375b1afc26201ec143cb8a0ce2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRVR11100136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cc7225f0989d7982041e5fd27c628f978e639027cc3dcd25bae03f0b22bb60. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRVR11100137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6d30be585fa68a85091739da3084407c249c5726ce51edbabda625b275b72c. 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/BRVR10900131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a66517ed3e87877b8423ac65cdf62b815f4a127c6eb050752183418edcba47. 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/QMDA71574951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca0c7546548e22ce80eb05c82660ac178d605c2d13916a20a1d1bd675d72105. 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/QMDA71574953.
Oktoberfest, Vol. 2: 20 Temas Germânicos para Cantar e Dançar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774e69ecac424eca084e5e0f948cdc33f43958c92444f88c3556b46e73197244. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QM6P41498618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab82c984d921181fbede812097d1a5204ed87a508088dc42573c498d5f06e31f. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QM6P41498623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855a4e8d230814f992f4d0a01e87fd50e1ba1cfdbb8c053d2b19a165eed6bc08. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM6P41498628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248e28a2a55e89050c4559240602e628bbd9b32d528bb00ef845aba056d836fd. 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/QM6P41498632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427ce2f076bfba27a9425c9e3720bf8f941738a3d3e9b9cdad8a09b7dedd3111. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QM6P41498635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920609674d0360e17c7da0d71615ac46286600f15a56da4d1d286d7c2cfd0660. 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/QM6P41498636.
Oktoberfest (16 Temas para Cantar e Dançar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4b559ee0a0208b6090f6f749e6c2d94046fe4ebacdef03f55ecc35c5cd9484. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QM6N21584223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58d1525fd8ef6b3f82fceb477a6f115d3209ff20dee76f0c2554db1002d84be. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QM6N21584233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2185249b27dd615bdd82b34418b8107e40203d2a5107030978dc54b4e22c0f7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BRVR11100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71e4e5c74be5e57470d1478baf5526329d70840edc958c9f637053c7a4ee624. 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/BRVR11100001.