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 0xce2f0c484c06454a915faa745afed56d14c9469e163e1f07535e8d9b4c862bb8. 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/8f7a2595-5717-4be5-a04a-678c9d0070f9.json and https://artists.proofprofile.net/proofs/artist/8f7a2595-5717-4be5-a04a-678c9d0070f9.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 0x06e13e1b50156ed2f6adee134938bb1fa282ead0cfb06bc801c14897b368e493. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FRW242007428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870d5ac9020b698bf001b9aa102dab41d39709c8e1cf7c680012b9c6eccf1dfc. 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/RUB422100325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cd5f289e720f2a256af3527bbca1b1a4fc0f4a72a9e78a941377d20cca9be2. 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/RUB422200566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e39cb4a53bd1af127deb9229bd8705e11d78a9c51a19b228eea1056a602ff3. 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/RUA1D2291465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc506e34c3f395c9c306022a1f31edeb0f999cd2edadfc17cdc5215ff4832cd66. 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/RUA1D2291466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2eb64af81abc03ec06592078377a1135f64a9315c81c72663b3894b7d8f2bd. 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/RUA1D2291467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ae155ceee65735c53c7210e88a27532a1d3f9ceea529e62cb540ea76a5b151. 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/RUA1D2291468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e8f826e7b2c32d709f4d624b7d35b5be64c46de75246af82a8964c82803370. 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/FR59R2297788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298b48b6c311b81aa9ab68eebb0bec2ff664851a45b4ada42ad822216424d68b. 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/RUA1D2291470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ac2bcff7def0e4a506ecbcc3258c02fa586ea60413b9785d70f12927fc23eb. 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/RUA1D2291471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a1f41629405efca2f9f004849053e8da0300054ec4f7ca9a40477f7cd236d5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/RUA1D2291472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cd5f289e720f2a256af3527bbca1b1a4fc0f4a72a9e78a941377d20cca9be2. 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/RUB422200566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d4f4c7b1e70f0c95dbbb26bb9df431442c91daf5894c83362fcaf3a24d934a. 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/RUA1D2291473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0b352e12c07168178378b110cd4ace188d993a045f1acd2819a75d7a1a8b03. 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/RUA1D2291475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce12a4c9a1ebf7a3a924e8751d1714f58cf086b95f44583628d72db89ce14b0. 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/FRX282263941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffb3de87b973bfa1d994d29d1d5d0558d17d7bb6c7dfaf7897fc1ff3acabe29. 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/RUA1D2291477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c38f2bfb986c8cf6b4bf317ef7a788524914420e872f3d63195eb4f273bd0a. 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/DGA0H2374754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03db23b906b38b48a5ed94ec1fa9827e8e55615563f370da9a0009ba4944357. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DGA0H2374755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adbe0f4538f09c5ebb91e50458a9f32a3e012439e783d6e4175097747ce30c1. 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/DGA0H2374756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8828925f091d71dca8a4501337b33b82bd33559e29cd20373b8140619305ddd3. 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/DGA0H2374757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f21a2d74b301030cec49e0bf9af32e1c850b0c5815224134ab97ccf1b11196. 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/DGA0H2374758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe35d66308347e23fc6f8a9c67cbbd3b55b78470d07a893903dc0157d3eb8d26. 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/FRX282394124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81c0e6c08c0205677bb83a2bc451fc2bf2b80e61eb3b20dfbfa12bc47cb47ab. 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/DGA0H2374759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3658afa2e78d7aa6aaf368b079b7546a2b729842bd291eee58fff792a3d856. 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/DGA0H2374760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e7c1922c3fa6bb3e68e5f0b7438f0652b7849baa36a4d0f9a4897af7a11411. 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/DGA0H2374761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8c900a1f9e819f4811b9719bcad98e1e24487df3af42641ce3e2841db1a7a0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/RUAGT2312807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e61ee3557dc6f23779c22bae242df2f50d5bb4074087962b6015ed7c079be4. 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/QZL5N2447241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609ee9c76bd11cd4704e11a80708642cd60842f25beeebcb68466ef6c88e7d29. 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/DGA0L2454292.