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 0xb5c7c88dbf13a3147949a2a85d1ee49e3cb22b811e92b196b5256c2a7ec0a4c5. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1eee808-80a7-47ab-818d-5eaa1837ef3b.json and https://artists.proofprofile.net/proofs/artist/b1eee808-80a7-47ab-818d-5eaa1837ef3b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Afrobeat Airways, Vol. 2: Return Flight to Ghana 1974-1983 (Analog Africa No. 14)
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 0xe2b3fef051b875c30f7786197c8568b4fa8c11a028abbe4f4067ac5c1e8528a2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:36:26Z), 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/NENR91374001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cbd0d008b6ba08a95cc0bd3480af4b8fa71704f92324274753eed03e41e83c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:27:38Z), 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/NENR91374002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f2c39915ad140917552845328a07f26354fac33734b54775981dd5a9017519. 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/NENR91374005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ba884a331250485394aa4d88320387492151b31c2f86228986e0bf692248d7. 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/NENR91374008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c833da9e7db0975aefbb51c02d1e3b17248eb1c0d3270eb6d74b6e3d6e62864. 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/NENR91374009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53cf87dbc8889f1831fc979e80843aaeb5efc5c469f61fecb70653dab1d85906. 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/NENR91374010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e7b6dfb0f870ebff040bf4ec94f11b5b8a09445c825a9148cb54e01e80db35. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NENR91374012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829df285e5a045b385514da170c23ec9b9a6879cae95d97467735df5d0ac0b7b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NENR91374013.
Afro-Beat Airways: Ghana & Togo 1974-1978 (Analog Africa No. 8)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8154a4242462ac73523687bfb8128f136d5dbf24003f6558c84b30e383aab1f7. 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/DENR91068001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdebb14c15c080ca06451656bbfdd67f478f612e4ba31d797cec5b3fcd409143b. 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/DENR91068002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffffe3ffc79be337abd3c6cd6eae22782d4382f04f262fc95e0068bb54fe95f0. 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/DENR91068003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f226456475e70dbdec5acc55ea01a9602464fbb2d03843ba3a55a89fa96e629. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DENR91068004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32aeb7c418ab0b2d2d50cb8cce91e8c133bf77ab49d804e7ad0be3cb33a0e6a6. 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/DENR91068005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd178b81b99fdb945ad5a21c6f85c739c3f377fd823a73c40cff9794e6ec036b. 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/DENR91068007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d23773f5fc978ab5f77fe62d954b5459597bd32e9c88c4620c759ddf62d33a6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DENR91068009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951c680b3f9ce7f2f4d0f7916302ec918a1915017d4b31689c810d7009b3fb1b. 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/DENR91068010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bb94dbcd33889e19cc02304c9d77ec33fa0c8ce038a6571621616099f29a46. 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/DENR91068011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f346b9fc3c21154a046568c73c50b97958927d9624900837e875938eafa4d0. 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/DENR91068014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398782d923470c3ea85ab3462c3110261611970487f1be6b4d474d577b8c6ba5. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DENR91068013.
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