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 0x01ee320b5d51991802cb7ac1cd73c2a69bd0771a44f51683a4e1c0f8e8530e01. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3df24ffa-ff99-4408-9755-9c628aa8642c.json and https://artists.proofprofile.net/proofs/artist/3df24ffa-ff99-4408-9755-9c628aa8642c.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 0x3990ed12d722e4a4dcaa19b53fd800df0a2070f3cc2b48c83475a9cc932c4845. 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/QZK6M2408871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f6c4e4cf12ee6a83cce52df94f9ba68775c38f87c1a86b5f9d63096fef8b17. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZK6M2408872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01709524a20f1abf54c229bcd42c6f5b8d9d60f6ffa4bb658f1b8c5384f9537e. 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/QZK6M2408873.
Guess Who's Back (HELLTRAIN 2024) [Dønski DnB Vol.2]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97caf21c36a44926cf33b6604a74ac36a4591b2b7bd4a50c2d56e8ba7b7808bf. 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/QZK6M2408875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75544c56b049f6573176d8a2299faefa03902972c083d97bb1b9b3cc1cf126d5. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZK6M2408876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cba30dbce3434a029d3782cfa7fb43a41381f889fe007028225fe3082e7cb8. 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/QZK6M2408877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6e5cb9df7cdb8a2170068d8e86fc73af947be766b85ad9608fcb4480d85e1d. 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/QZK6M2408878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9233efd0f6a15d4ba6f5ef5c9d6e1b139b93c0acfb865b788b20697ac06add14. 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/QZTAZ2393229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10759885c169f4a20991bb8afe995d56edd31ee2c3779b9a7abd9519f135c50. 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/QZTAZ2393230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf188aae49733ceb2afd312c7bd2e75c9eee5dfe6614cf4bff45f563ad6df4879. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZTAZ2393231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33506e9045ef595b92309d0e8e5c52afabec7e9ce7fc39c2d88d9a88acece83. 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/QZTAZ2393232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f4307861211e20f855aedef0e8617a674fd6024956a8cd8c365ce49d7b3f5b. 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/QZTAZ2393233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd119f55194c5ca21c34c79740ddca22570c76dffeffdc95f3a3ae71768ade852. 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/QZTAZ2393234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe698601c2f68db9e51db5ef468e22f35cf801adfefe3b054195f77ea72348a96. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZK6N2474079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6206755123f2d1cff8d4c5b003acad60b49ddd11ed1f8fe932f30d2f5cc09476. 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/QZK6N2474080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c26a33355ad6bcea5dabf94a60de92b0a99b5b129dac1e8d12291ac987efe3. 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/QZK6N2474081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf075eb92d107bcc2882fbc1adae5a933d48c69ac5976c2917f17d9677c31dd7. 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/QZK6N2474082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e1d91f724c137e94705917091e6e4b47ad40413e3ff893c2e90887db42f11d7. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZK6N2474083.