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 0xe8727f66979a654fa45ec13c158269889b63e014b2cb35bff1aa2e68b5da8d77. 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/34a70ac5-fbe6-40d0-89b2-1213ad24e110.json and https://artists.proofprofile.net/proofs/artist/34a70ac5-fbe6-40d0-89b2-1213ad24e110.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 0x1188d1aa54f0d9e30f24cd9f5e902a080e35dde60ac0180d654b5105b2afe6a3. 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/QM6N21863998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2665049ec4d5160d97c5841102d636f79ebf0e740e07bc959674ec4e7cc40a. 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/QM6N21863999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6208b7cea94fb382ba209d25632bcf5739ef2bc3bd9423b2ef2d4732c1463c. 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/QM6N21864000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1a2f7482b14fc890ff4913b7170debcfb536f57b0354154597413670cc377b. 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/QM6N21864001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84adaba9f4be1e754d8526f418e0caf70adabcace070a42c80adab0079422720. 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/QM6MZ1840693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6379e7c60ff4132a5c039f6e6f8b4ea905790fe9e47f747f84fe06efe0f30092. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QM6N21864003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e385d0dcd42f9b6aa21879f610338fe0aeac79631782c4b277ec09d66d949bf. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QM6N21864004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11d0a91a25bdaa419d3b04ab41976cc9f60a18d2eee1d4e12a0744225d5fd19. 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/QM6N21864005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30db7b854a3b8c3028ab6616090120b5e901fb88e6df2c1f54450db0edfbaedd. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM6N21864006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d18a58cf21442fa1b6829dcd069d9d704687fb06b9ce604689c19d68a8868b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM6N21864007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d46036ea3013b4c639beab7e0a901c66bea9ea61a68d70e951ea6cbb320d3c. 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/QM6N21864008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7014a9cafd9c5c45fba8dda45ed611db23054a7fba69109931bc24426b965c56. 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/USA2P1370132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ff8f433720cbd8fa5d3a0754a794d48bb2180bc6eeafcdeaf6675b93a21716. 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/USA2P1370133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946881c7c3138f83725a83fcc10a1a973ac3fe8ea7ecf42b1de1b26287059926. 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/USA2P1370134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10be5dfdd9d6f8dae1fec95bd0380bdfa0f372604335890f3baadcc8e6b4fae5. 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/USA2P1370135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899a176107969b7accdd931fb842cb54c356ed272802b7f81ba134579aaccc60. 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/USA2P1370136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881b89fb66abc6274e95ee9b91755df100792834c14c2517ec22a21a67256c7b. 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/USA2P1370137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716e2524ab1547d1808dc85e8077be80c51223370a035420a882a7ac2b53db8f. 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/USA2P1370138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba76102f6576d3ff04f136148489114c311cca544ec3927825c159035952aa9e. 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/USA2P1370139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fda77b25aeaa869c6015f4e8ba6a43db7b2c1d47056e1e572dda2466a9d4213. 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/USA2P1370140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4406eff762f87aaae849a7c6300484a6e5d5ae46bd12f0ff23ba35dfd5b70fd9. 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/USA2P1370141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6379e7c60ff4132a5c039f6e6f8b4ea905790fe9e47f747f84fe06efe0f30092. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QM6N21864003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1188d1aa54f0d9e30f24cd9f5e902a080e35dde60ac0180d654b5105b2afe6a3. 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/QM6N21863998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84adaba9f4be1e754d8526f418e0caf70adabcace070a42c80adab0079422720. 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/QM6MZ1840693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6bed469683002b489a06ad469cd7ed393f5e44e15e0d2ac7638528c6e7f33e. 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/USA2P1660615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11298e3346a56f60ad85968eeb873c07a6f76617783ec48f1e611f28aca93f42. 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/USA2P1660616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9af325c75e0b715ea289136c6b7b619f5cee028710e7ed5f95de9a04c9a621c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEYOK2031960.