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 0x963a016b6a572700d3d628b7641a60f8af15e82335c1072c7b281ebf4d6af3ba. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8dadd3aa-8a79-4945-84e3-66738993b0d0.json and https://artists.proofprofile.net/proofs/artist/8dadd3aa-8a79-4945-84e3-66738993b0d0.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 0xdf71e8e88c450a601807c63d7a0dc4c8203bdc162e7d19ec55b0b19f5ba1ccbc. 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/GX53U2454121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac578841dba0d03552241dcdedaaed612d1f7e64e817148b2cb8df2d1f913ae. 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/GX53U2454720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484d3198c380016f400a2ec9d8852142e3af23690096ec24421c245e20890de9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX53U2455350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93829b6e5be587a25354e5c7fcc713e98afbd5cedf5dba878f209c5d44d04a04. 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/GX53U2454561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45001d9280c666c344ba5e363b2e937d5507fd238dcf5aec830be2ff5231cc4. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/GX53U2454741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5a86885beca658eff7c45095fd076d5ea9186181003f44d5144d0d33713cab. 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/GX53U2454157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff39e064d8db4b327e92066af03339ac691ceb34f1e626328e8b6ca66e7b279f. 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/GX53U2454627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ff6abb9260c0c5df594a74257aba4a728c99e28099b780d1a90c62030a5788. 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/GX53U2453930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0473034d9aae14131c67e31fcf047054ac4cc6c9c398b6a9e42b7b69e881321. 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/GX53U2454465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad62e9225f20a71e21bd3e94e252542f7c31f92941bab647280a9133ffa716a. 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/GX53U2454421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9585284f057c1549e62db9c465208530941cffeb3d489abb3244547b692729ef. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/GX53U2453256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f65facd6936a0b32e115e154d1a4e75d0b55bbbbf95abbf6b12a227a956ef73. 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/GX53U2454323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace4b1fe17affd889e7a61d993f076d0ab39f8a03d991d86a36397e96a12441b. 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/GX53U2452872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90311897b4e383b7c08ee9d5aad443f7c7f59fd04987943126c13e07b6d2a6cb. 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/GX53U2453231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9874f0a7b59da37eb9e613e9e6f3bfe7f609d07b51ccb4f6d4711f30e74af6a2. 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/GX53U2452674.