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 0x1ad032ee0d525e046bb7f043875eff106eb985f956fc91a4f9101b501e0b435e. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f781ee3a-1581-4419-9385-5d82d9007ec0.json and https://artists.proofprofile.net/proofs/artist/f781ee3a-1581-4419-9385-5d82d9007ec0.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 0x0656f1dc13bec18f8958b634a1c07d2f2097fc652c5de0db1ea6725e85b29af2. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/GBSMU4492913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280ed5eabc5287e8712efaf7bb04a2b277eba103da7b0aea505d6ed54d41687e. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBSMU4492915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1114f2db4142ec1c5568735b4a56a437c0404270ea263a3cd2d8f28695e0ba3. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBSMU6198271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3327da626db4e81cacc3edecd05567132ecfc31f6e11fae76b8740ae37a789. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBSMU6198274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5775d0dd922b0609d2614a69cb6735f7302c62f1668b951e6dceadfd2f1b5b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GBSMU9431853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a583fb72b74791d85bff5c78cb0920ae7a9b7b3dcc2fe2fee97a74f11e3b9ed. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/GBSMU9431854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465df27ef44017e9a9d9e7074439b5a4024a68673768346c02e0f2f38be80f66. 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/GBSMU9431860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcc67c71e0c1ae769df7a1c3b34b4d94bc9b9f9d86b07cb5d6a17c3a5567e77. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/GBSMU9431861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24510869f19eabd561a4b95a79329d69207aca2ea9a108766a3c0e17d5e1d5bd. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBSMU9431863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ef2f2cdf5bdf89212c24aa3fc21d84dade23f2436e751649052dd454712f01. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GBSMU9431864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88a30d7d960ec1b4397095ddb3be5f84585f28c3cb566e19d4751f5fba0a4b9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GX5MY2338719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886414edf96e9071d4753adac97d47889b9ab5e92267326688897918e477c21c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX5MY2345603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9be32d50fcc23be91d302affba8d863912718be2bd69d16da06d1e5ac0a5fb. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/GX5MY2344024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e2b2975e080bd6d69ca8672c884276a1d86a2c16267cd37cb799aac9974abb. 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/GX5MY2363902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadac29518f6fa9e3798900de94c83f030c309e19130658351d6714f3cfbde2cc. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/GX5MY2374439.