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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46962c7533dae361d7045ee9a339b480400893f022a9b25e26d2095b6d84609f. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8982feb9-ff28-4c4c-9970-65bf5ccb3cab.json and https://artists.proofprofile.net/proofs/artist/8982feb9-ff28-4c4c-9970-65bf5ccb3cab.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3150a37c8d30e908837380b4006b7bd0f722bb9120edfecda3c1aba391e66560. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SE5XG2259705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd247d7d1bcfa21851a675781f8e8a2d28f7f9261f5c04206777aeacb35994d9a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZX8H2323573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737e942ae4a69cfe999580a9187ddbd863c11c59b95ee4c0f709bd4dc5d6bd82. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE57V2401053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cd6efe7ade9dafe3608c196864b77610f9dbee5c75c3d9c83f9475a39dd0e0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE57V2401054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3a6a13590f2a2c21adfb887bbd5b40c8f5aca70a9c7220b35118dba839e169. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/SE57V2401055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02693389c95e092e5d7d5902ad73708b6d5c7cd390b03becd1b99d702151aa0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE57V2401056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58f011d5a3e66ef4721f459c9d9d96c7385df470ef758ee189eadeebc8acb97. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE57V2401057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba2c19f872ea663b39f4e74ad19bf53050ad0f86f4e3336d4b9840701993fd0. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/SE57V2401058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf9859a4ec6ca98f7a21e954caf6080a765150da53fd4b1a1b481848c97b187. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE57V2401059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c2227c49817d127a36d041ffe3606fe068efbf47ce4f9d31442413f4540ec1. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/SE57V2401060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e92ce3affaa4aa9b1acc13d652d326880edae175ba46ae870c7285b17009aa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE57V2401061.