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 0xa875e6dd6d8381207fd4a8c02a30c5c88d363a25c821f025cc8f0d167b7ba268. 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/81e3e16d-9fd0-41db-8307-be26aedd5f04.json and https://artists.proofprofile.net/proofs/artist/81e3e16d-9fd0-41db-8307-be26aedd5f04.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 0x300e27d2760512c9dccbdf8703c6cf7b56df30ef2c9a6c88793c93512ed82789. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/RUA1D2026446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7de364c8202414fd8de51997291effaef3d14504bafdb1fba27ea8ff379015b. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/RUA1D2030185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63afa4b306afd23e60435afc9cfb1f92d1290b2403531d5dcfcb0d6ecddb3f82. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/RUA1D2051701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ec17bb9c54b54854ba3e6a4baa023e9cfa1ca23643ae1e17d151f55daed4d2. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/RUA1D2055230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4186fb9a849ac2c342f54cc79afd8bc2396a5bb3e2c4f45cccb5adfba7177216. 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/RUA1D2069042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07955189cfedd2698610fbe161d24b96fbc178a7b7185bc78c45006d949e6d5d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/RUA1D2070114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad8de6be213e2f95b687426097906f91b26797e81d76d0851c0c25965376162. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/RUA1D2110265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43534497e4f9274f03504b3384c0450c624f1e14f0a8438ec058d2870d8959a2. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/RUA1D2117034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dad24491b8c8f0c1b94a350c5073784f6dd0a90f5d88e8a9db0457057b0fd25. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/RUA1D2119660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c5774c8f600c3bcbf7ad19aa6b76000436395413041f2c80b823ac44776042. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/RUA1D2151501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bb66d0678885d49994ae32fa0a716cd51cb0b3386ecd59b6ceb2284430c050. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/RUA1D2157026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62ae93d3b9ee8b890ce3ea68aadce6512bb3da5a384cff40bc5f8f5d80351d0. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/RUA1D2169029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fd28f67d5a7fe0f59926a9e62dcea4bf2fbd106c01406331ed0cbfcde9b2ff. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/RUA1D2172025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe133efd50b48205f04fb75ebc3f1cc3e8bc53f9d98cf1395715ac4c9ea01b1ff. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/RUA1D2209849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21772db1a2f0aea22f606cc0fd85dd950279397aa14e28e7f9fd805152ef793. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/RUA1D2226384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3bb58b3c402824e05a75f33a416fcfb13b6925719d181d97649a4120066f2a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/RUA1D2230070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f2ccfca944b4b02a069462be224912e8505c6ada8d88c8fa3719fc344f5c89. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/RUA1D2265897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdb6de5a94ddc21810864c1ac09819bf361589b5e238f5049f6ac7e84f4e14f. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/RUA1D2273757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0ae8387eb3acc4e8147fde2f003186b4b349a5cb4d38962e0090e982260696. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/RUAGT2200552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c53244e8540941633d9df91fcdc872f0ef594fa0316d0d172e2cb65ff69768. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/RUAGT2372800.