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 0xf7a56c41f3a36427397a8e293e75b802d601d12d4b01713dfe00eec686b3c7fc. 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/b63dbeb3-aa9c-4286-9f73-1eead4127bb6.json and https://artists.proofprofile.net/proofs/artist/b63dbeb3-aa9c-4286-9f73-1eead4127bb6.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 0x07904629abd15ab18fc4983e90ce80bb862ba7414d7a138bed52b129b5ce0056. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEHC20980275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6231c71d8f69cc41150be4de0fc1128cf4078256b9cc156263db30d7300c754. 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/DEHC20980276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b784382fdb26177357f42f6f745889b7f37dba7f4959f5b923822b75562c931. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEHC20980277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc8c096fe8453a8677516dbb109b371f980e9b48ec020aff74a4eaa269baab2. 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/DEHC20980278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9288800f263b95cd3ea7036c05a28e16ce3c595b6e26766b913ebd5880985f01. 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/DEHC20980279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f3a839e8652ef5ca4cfb260371bdd4da604d4fc7e481b98ac036e11a85f171. 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/DEHC20980280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4592be866cc2fc5f74d1c61b54e11d59daacf05d569f387f3f70fdfb14c29d8. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEHC20980281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3203b6d2220293897108ef148732e1e536a7355080bc23995a6d5fedb74c6ddd. 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/DEHC20980282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd500dfcfa8bcd6d2e030722e4f3aa1a60f7e099160d2e057050268f05d5d6017. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/DEHC20980283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956fe40fd035fb57381f488cabff119e2799bf8d85c92711b41fe4fb32df6d97. 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/DEHC20980284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec816a6cc5e0753b0916882858a539e1ae54e4903f6177b6d3210ff69e76704. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEHC20980285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6dff06c5bb3186d1cfe05e94dc20593f613ef1652c337470f0b17c20361cf68. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEHC20980286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ef4cdd56dc7796c145d5d3511b529c2034c62f00c794990b0794579551150a. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/DEHC20980287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d143e57f4a18ff1ffb08ea466dc39efaad3dea3f99feffb7fc1c364b55855a. 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/DEHC20980288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa6a87742473b12099d8ba9184c8ffe91d04fbfe0b7205b69bd9f91f376a3cd. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/DEHC20980289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6db2578205b133e26c292de36a089a459f6ff10129de3eb3fdc75e6f5893751. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/DEHC20980290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a41ca3b6db98eb76e3e34690faa9efabc46e2530d504a79c2d46c1a11312daf. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/DEHC20980291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07f6fa002f869fae8ec44160dd513eef1897370fb4cec131bb1a2933620047d. 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/DEHC20980292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea12e11a66ac536dbbb4cf8b566cec721695ca6e37f065e49745a5bc33319d7c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEHC20980293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361347f0a00262e91b0cb73697eeb04b9d023e8a832aa9191ddc48e133cc18e0. 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/DEHC20980294.