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 0x6ffce0d94f3d9cff76332f4b7ea9eae7c3e5294ad01e56b8aed70a305dc9bca8. 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/1985b43c-8cb2-4d85-b283-43a6756ff1f3.json and https://artists.proofprofile.net/proofs/artist/1985b43c-8cb2-4d85-b283-43a6756ff1f3.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 0xf23f0485b75bbf3faf0b3a0be410c6c4460e9669122dead8385f26bf069d875c. 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/TCADP1886279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c9a40b37348209545f685102d1b64e3ac267a4da7eaf8c6073cbab5313b8a7. 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/TCADP1886285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4893ca22c3b83076e1c4c3a32bb4e7e408decd6f28bf95f28bf8695e3669e4b2. 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/TCADP1886287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653dab929e600382f9c695931a903541aef5ad7e0c10ddf3b1bb8cf5d495284c. 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/TCADP1886288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473a907e26f576db3e327d5698a11f6d6d92d5fee71ff8dc636422ccc9c1326a. 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/TCADP1886289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a8112779c7340e8d7fc48fc0cb6991ed1ed155fd89b379509fa6a0a17844fe. 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/TCADP1886297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee59b4beb0fd990b4ae3e9bb7addf2381b6860499dc0dd73e7c46920cad7218a. 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/TCADA1744503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd125a0fcfeb6977203206cd51d5fff8eb219b2e7c2f6104bc02e2486f41929ce. 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/TCADP1887162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92f55c4538d49e4a9c723c61b39c7547d110fef0e8f2f59ca500a617a5c68ac. 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/TCADP1887001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf418f7ba52acad6447fa428020894c225ae8a6d8c1d4e69aa19f07e4043a2db. 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/TCADP1887007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe467e58cfcd2a295810d2edfe67349d8f43bd4c8d36a89139a8995e9258e874d. 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/TCADP1887018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a5a4965028ced139ee17370a987a59bc1db49b280af2d3ec5ec46a6191fa756. 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/TCADP1886712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb23cd15a11d17efebda495f552baa15636baaff714150cd2c486a790a6b799. 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/TCADP1886716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf431c6f76f9018b0649d7e817a325a5df40950364f3dc4a24758237f069a4e1a. 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/TCADP1886721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3a9c29ff658abdff360e733e4396de15f66587cf4547d114d2bfa0ffef6800. 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/TCADP1886858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c51697859933d45bf7fe065c20ae958898c8c591c26f42a72099349b8d9309c. 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/TCADP1886876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3122f70d5c43bcab27a20eeb25a6da5f62b0caa0f77d6001f41f0131a846d63. 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/TCADP1886479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa424f945a4e60cb391d16c6d25cd0c4bd9ea6176099165e10a8c066e94a1f26d. 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/TCADP1886480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dee5cb9c7ebd53d81ea774a5e37f5a3a55938a5a171c359c9f74c989c4a4851. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TCADP1886483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0550c0c4c7a5a3269f1b64619accc2c7fc4f5378b433407a9d91ed4881297a59. 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/TCADP1887481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfa0c34e0b3d208cc97e97409f356b1d84d9d2ab6da4c0ff29a04275136b10a. 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/CAJ4A2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fc9915b3ab271f046cb030b5563c2d08e960b765b07c0c30dfb0791ad7cd47. 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/CAJ4A2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43984b8406b5970affe9831b9174341b140cc51eece97e3ec5a8fb9da94d27d2. 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/CAJ4A2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a6a195d133833182ff9140d7969d605a5f55d0ca0c72db856e33a7634c94d5. 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/CA4JA1100056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad3023ad75f9623d872849b269667f08d9724ea79432632ffadc8bc5d91623f. 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/CA4JA1100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c7bd816370caa79f9ab653a4e7d2474d7d01da381a4bdfa7f3e6fbf03412d6. 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/CA4JA1100068.