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 0x5afde6cf4a1f9380d2999d1f4011e24a894adeb31584e2f9da143aa4497911cf. 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/ea9f1a90-9c1b-402a-9df2-4b9041885c59.json and https://artists.proofprofile.net/proofs/artist/ea9f1a90-9c1b-402a-9df2-4b9041885c59.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 0x61c674c8744c5e686243647ee11302405efe51c2000c807152cc9e3f19f597f2. 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/CH1610857301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee691d6d1362e0db0f2722fb094318c9193b170bb60be3d46b02aa97dc3fc8c. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/CH1610857312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd6c3c9286b5ae38cd51f480850874e52627990ae6f346054aee313876609c0. 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/CH1610857314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dae5901b0179a43911252d68b0588a4de3fb059231c0b5876951f78f7a0fda6. 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/CH1610857320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7302dc11c29e8a47b5fcb5a37d1650ade1b049333d2044657b7264f0934a3946. 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/CH1610857201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dbc9991972c34dc621fd7b152cb9c66ffd94a139c532570e320b313c83c0bb. 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/CH1610857203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9a6f52b85a292a790bf304376137a42717a52ba8f77c1667d46f0303a3d17b. 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/CH1610857208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff179d07a9a50b17e0c7965bdba1fefa94c8e7d0b3a7f0d8f5146513d10057d0. 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/CH1610857214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cf8c87be3669cffd918aba0445ac7508e56b6d8bc88f6b24cb5a6d55613e2e. 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/CH1610857218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee117e57b5e9339f02feb57c7096c7971256b6686a1b36ff1745839d347bda8. 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/CH1610856801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f4843c6c542ee769bce6fddd799db8285685382a6115e7250f01d9c6eb9891. 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/CH1610856802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8254f8da9ef66380c0780ade9c00152d7bde10cfb101b5a0a01e43bbfbf4d7b5. 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/CH1610856803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994aa201d24b1e91017e16a5ca798d36e838130c8433db96c9f36b25f62d5af6. 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/CH1610856804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58678a62e5bc85c1e37dc8cfb01639d993478704ee97fe290ef7a6965b8c4c6f. 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/CH1610856807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf708b388e222586bb004ed356d522ead40cc8075735dfea53c794b45426efdf8. 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/CH1610856812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc5683738fd983a1369b549f5a772c50fdce34d4ac9317eb5336c4c94eb12d7. 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/CH1610856814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac028e22160780045fbf8b0b3c6255827f25a25ccd7fd84f217860d02e296ead. 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/CH1610856817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3d1c963a32675a77e7a9ab440f13b811579db212ff680219e0f1f6af38b70b. 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/CH1610856818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745cadaad82b46c9c667806e97ab90952c3989ff5f30d11e637878079b7dfdcd. 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/CH1610856820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4f236f3654b2b1b8a2b21824a327e5863ea96b25e63f2baebc25ff0d9048ee. 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/CH1610860620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c79c18e0c20fd3e0ca4d60ac660491b822449ae576385c171454b34e68ba8b. 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/CH1610856908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db9d4562dd7a9bdf0eb8df8dafde222606119aa11695556cf18786c7ccc2d98. 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/CH1610856911.