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 0x0fbb9561067a5d99d2921b896ebee260e9d889824f093950c40627239c80caf1. 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/ea3a3fff-c95a-461a-8a96-7b6f82df81ab.json and https://artists.proofprofile.net/proofs/artist/ea3a3fff-c95a-461a-8a96-7b6f82df81ab.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 0xeeccb2f142f1844f46ba24cb4863b416eff4ea8a922a658efb90111ca9b37c73. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDA82064291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ac0e0354077feb68872db6f55f1c281d597d8a6985e080621f4c93f535b4d9. 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/GBLV61729232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c495c006cc6d3c9c1382db6320b65e08d4543c95c302a7582c20f0fd50c3062. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLV5Q2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857fd6b025eff54b2876de413aed1f501dd043ac77fd8ed49e62852f0c68aca8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLV5Q2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8360eff432d35260b7c1d394d44c2c6592b4b21060b0037e590fec08e30858a. 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/NLV5Q2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fba7c71de3b4ff1723b5c1a216207cd0c78fb849027ad67b29adde17d570af. 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/CH6542356134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d5a65c1fbae502bd7ceca8f8bfdfe42fea6896f01b9013ff7483838d215169. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLV5Q2300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bdb4c72119e13f49ab020a2dea0a0db6b950588ae09398fa0738913482cddd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLV5Q2300069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249c5f102748fe1f3203d990ced0b2bacf0caabc9b01421a62bad1f26ef3a043. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLV5Q2300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99637ad59fe329afc243efe47d50eca03b5e6036c8c5d1bb8336cad1453b8fb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLV5Q2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7652beed6e56449f906f7e28497f5665b3ebec2dd0a174e415db2d3e6c8ad00c. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NLV5Q2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92476d6789c91e52cf2c3518c2987cfa1752699e1c5e182c9ded42265910080f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLV5Q2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e7e7d79ed5d565d3ce4cbe97ab41f8f4d10756db43c0c76e82bd3a23e59693. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLV5Q2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54961fa44152c23ac3bf7842720bed1129227c119284384157a4a196856f2d6f. 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/NLV5Q2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdb1ab943d9e37b833738c06185ce5fabecbdf224f914f760ec5015c187c065. 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/NLV5Q2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebbe62ad2c4cd2181b712038488ce4d0fb05e64e3b139b6bf2caa0551c132ad. 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/NLV5Q2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5583c8335da8427e3d4b07a0fbd6fa815cb41c70c1815bb0d3b7fbed331f2947. 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/NLV5Q2100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db28e6f54d0062fea70c5a872a2904183c7df471db0bd963e80c6e3fda4c3d9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLV5Q2100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723e8e2721d8d0b5a5ba568e9cffa6c81daa00fea789f23c72a1994d56877111. 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/NLV5Q2100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8960e7adf2abcc414dfc6fc4be6c5cc65902aa760e9d69eeb81746d90355380a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLV5Q2100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4245eb05f0eff76bbee7413ad1c502d7d46c4d0e6370a35a46e06433522a775d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6J2005120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ab79698aab46a966b2902bbdba869fc74be641857fa953fa67db23da1ecb41. 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/QZHN51905112.