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 0x07a51e1ac747a310ba93bfe05e0ec6dff77a4841b40a14cd4803c9ec4ee94688. 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/ab0993ba-018b-4c32-bbfb-3c164ba03866.json and https://artists.proofprofile.net/proofs/artist/ab0993ba-018b-4c32-bbfb-3c164ba03866.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xc91b57e52fd0796f38301f8a71757632ec15720eaa51821fefafde1abd198e3d. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USG2M0600626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455c9c0aa80d4da4dd13245b537224630b0158f238c0197aaa34025475d6cfa4. 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/USG2M0600629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8354323b74a72110e97fe3615a5b2993b24c0a2f5b46675762434fec242524. 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/USG2M0600631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21da35a04913bae2b33ed2f62aa639d613b3256e8e3533611aa6fc8cfc5305f6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USG2M0600633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc462c37012b6402ccd68b5cb364749b777bb8a77de0058cee00ae92df22943d5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USG2M0600634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28090bccab42aa6dd49c5f39249948628ad6dfab006ce0f65bd4178166eb811f. 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/USG2M0600635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4230d9cfbd9ec366b28639d0d9a3841ba4a127b7812c357e9b06db131e59ea. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/USG2M0600636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71ffff433f2ac6c8b5f882277cc99a646bace88be7dd183b4d0377f127c8162. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USG2M0600637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb0f057f0ef1f4a1446ddf11f2306dee0a57b5a07362b9dfe352b8fe214059d. 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/USG2M0600638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f155bddbf5bc7ce7071498a016e92abe814fc7909181f976148a62f1c86c7f9. 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/USG2M0600639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1947aea4c8beddf4446832f3e7c147f71f49271214419a2a03417df24eb8e6ab. 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/USG2M0600640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e69ebf48509268a466238d65f2ac5c9b666910aac67f820ed4839d0ef4d9051. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/USG2M0600641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d395c8b3e69b4c2ef5dc75360776fb89e8482ab1d0ad82a0108a3a4d7406c5c. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/USG2M0600642.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc462c37012b6402ccd68b5cb364749b777bb8a77de0058cee00ae92df22943d5. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USG2M0600634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d395c8b3e69b4c2ef5dc75360776fb89e8482ab1d0ad82a0108a3a4d7406c5c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USG2M0600642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1947aea4c8beddf4446832f3e7c147f71f49271214419a2a03417df24eb8e6ab. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USG2M0600640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bf7ece09561eb967e3d3509f9bafb2bab053605be75bd3848d1a3251d2e672. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USG2M0600643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d395c8b3e69b4c2ef5dc75360776fb89e8482ab1d0ad82a0108a3a4d7406c5c. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USG2M0600642.