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 0xea17356844dc97cf22a7036839ea890c529d49523c9a82b94cabe0053e508503. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8de75b9-0aa9-482b-ab73-5ae83c5f7138.json and https://artists.proofprofile.net/proofs/artist/a8de75b9-0aa9-482b-ab73-5ae83c5f7138.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 0xb9c06ca9b4fea02de3832d735084dfe0078859a608f6a17ba63d5ea64044f8fc. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:11:47Z), 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/QM2PV1702757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bf97794058ae3dbd7c1818267926ca8b0bff36cbed96d83fe18402c722defe. 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/UST8K1890000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b338933cdd097af2b0d8bf00fc3d12177be6fc13b61dde1c9f3b2b45a24ec02. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/UST8K1890001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2774499b39fac91a503f76464460b66849331c38de3e9e8dbdebcd980c8b07. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:50:06Z), 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/QZDA51882607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea9a6514def4c8b238d905e4e384e77a335f3ace4d0c5a32f66025276d69236. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:39:43Z), 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/QZFYZ2010767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a58df50b2752f8d977ea0bebe55a3d19803a00b6ebd3534e2d00cf636b6338. 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/QZFYZ2010768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c1501a1365a0e1ef032d39b95e9d1832ffcb1e51191f620c0372ef81c06eed. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFYZ2010764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81afb207f5a59cc2bf867289f6f15626fc37de8da0d20897a04c579a9397c5d0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE6TI2320868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3887342335ddb5d157c1d23cf89fe1203554cb285afa5bedc9b9b1a6ec1a52. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZPLR2485414.