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 0xbb95945bead69c7beed75e9cf45a2914c60ec68abb93bf99b23cb594e1effccd. 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/4fe0f32d-e561-4665-a7d8-4885ff0e77e1.json and https://artists.proofprofile.net/proofs/artist/4fe0f32d-e561-4665-a7d8-4885ff0e77e1.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 0x314133d3ebe47fedac77eeb656f68c5c26e76ec3f717be160760fa0155eba028. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA0P2350090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1925a4ca4d102ea527274d9ea842c84a0b97e48fc4269e6c045ba9ce4ecec563. 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/FR10S2429960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b365e68f3445f9eff9603c7e9373b0a567011fa69ea40737fc9cb9a965c2f5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TR0012200223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561f3c3b55ba2419c3a58318db70bdf29309e54215899d57b77927ce7682fa84. 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/TR0012100338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65356b6775b6e8f4bdf74b9fcd03ef2abf2fcd0f04c655ecffa3beaf6eec864. 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/TR0012100435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd352c7ad383b05e0cae334eab07738e56636b7120e72afd478b0f73ff7440fe7. 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/QZDA62123322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b302c1a5c3f37573f9ab7fdad7df972243b206d912497831b9efce9700d8a14. 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/TR0012100440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e4bfd0beab4d17850a3a631ac4ef1d3c803fe9d2c7a58d69b475d6f277b346. 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/TR0012100382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa543f048e0786bba30bb4c1d0325ad7f27d87e8988ad0d5d5733695cbbc06dce. 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/TCAFL2106668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7e5a194d5a25d518a60ef8a4bb8125a39f19f51b8b247943d505b0cbb31264. 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/DGA0L2391932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314133d3ebe47fedac77eeb656f68c5c26e76ec3f717be160760fa0155eba028. 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/DGA0P2350090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6f19d84f4b2d87863cc1ab1506e0d67f6b51e6860c02b6be2029c59c839055. 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/DGA062238833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa557d9bf85e4a0e0b1d51c5dba8cb0f6e49f39abb45b2fb6d04f685f9a835b83. 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/TR0012100292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85dd124cf300ba1ddf2e79a550577c123c7cb176e8b32ac42078885b8054dc4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA092499871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5f17cd596a4f1642ca52049ca3c4e274fba78cdfda15344243440ca022c010. 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/DGA0L2387857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346d9227a23afcddedb7639b0ff616ca52434b2146c56032f798491bf9d726e4. 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/DGA062272585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a123e07ff12d22d416ba1a3d82a575f49815d3bda5803d6a076917fcb333fa. 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/FRX202235694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f0167a3ed465dea62bdcc711612e9d35c121ddf5386dd1bbf3bd600dddb9fe. 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/FR2X42334304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b0b68b0adacd9044828a67004a6d76f4c5053deded4aad531429b1f2613ae4. 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/DGA052264219.