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 0xee5e9795653ff918ab617eb293ddb3b9512b3b223056f3c41576b19f9e288d41. 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/df1d0692-babc-4067-9132-37224bdb7316.json and https://artists.proofprofile.net/proofs/artist/df1d0692-babc-4067-9132-37224bdb7316.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 0x0a1d7f8d88b8122b13264f02c7f45d8537c95dd81c7d3056fe7e112d4d8eb5c1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJG2546593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc512591bd19e735b0a76c999d004902434e8fd4b6bd149952f30cdc75c986d3f. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJG2548553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee129b5e6611385145ec569b3723fcd9f109928037f25c495be4a76fa208cd4. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJJ2574496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158013fa1a1b1d09b26083058eaf2d4d6301644f114784efabcf0661ea61b902. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJJ2574533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a6bae77383799fed6ca8125c0a79ce08caf52c3f9a5470d06f382c2bbee466. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/TCAJJ2574568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416c34d2bd65aefd8b7dd58711bbbf6371b47e9d2ebb60fc20d522ddacbc7810. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/TCAJJ2574587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4a15d21506fc06a969d7821fb6c98f80c6d06209687ea88d0d4113e5e8feee. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJJ2574600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b7bb5963dfbb62922d4ba809b0be55057d341c0990dc35c8a24701940a3420. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAJJ2574638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be53c50af6e66e10fd5ce81ce431b51f8b16a0719c71c947fd3d2f8209c27c8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJJ2574656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a1d994d54d58a807f2afb4ed6bab5a82900b45ec53eb93d39a13796a1eeadd. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/TCAJJ2574686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05911bb26d5a0cfd0ff8eb878821612a1e87eff45e2ab2748dc951c603e7901. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJJ2574701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb7d4618ac3f396d8aec04ec8d71e7471d7aad23216e5fe1127145a2d3a3862. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/TCAJJ2584724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee375be8bb1c8fbbf43a0fac54bbde8dbd817b0396d1fb55a5f2afedc0bf03ad. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAJJ2584773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67dbc41ff4910c1d84d8de04020bb357d3f703c4e0977e48856b95a409fa696f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJJ2584897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7dd89ec8cb134b15313b16199df6c35f0d568cc79bfec8b9b538f738400815. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAJJ2584921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f0b1bb88f46d1a4b91255832041317829741568b826e24fd078354e1b55f27. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZTB62547629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d54a82f5e913d3c92466ed983d0c81a2dee38fc816e624cbad68a5078b23033. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZTB62547631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28256e06a924e4290d5c7d8ec1dcea3ab1dc3c9647001a16e3379deafb7362e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB62547632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2382b2b8f4ef0f3cfed056d15c0da0b9581ee07ec129e11a69ee709afe7de5d2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB62547633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b9a7733204caa3cb9133b810d518868a39eb97604fcfb89a045fcb7ac6fe0b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTB62547634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5b41cb5c7fece8bba2b922d07b9439b94470c93bf079724579fed9d52c0bf1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB62547635.