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 0x93599170b966bf862f871ab5f4476d0aa0b0ad976bb271d0d996ac8f66fcef1b. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dda013aa-8bba-4682-9ff0-1c5ac8c6c79a.json and https://artists.proofprofile.net/proofs/artist/dda013aa-8bba-4682-9ff0-1c5ac8c6c79a.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 0xaabb57242026f93b01585c89eccd1bca330bd00e8451d2e826268dc7e02919e7. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USMN24200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2985f4eda145dc5cc98f8d1c6e00e7872c791948c284e8ac2d87900cde085b. 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/QT4HF2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750b1cd1fbd376063517e3226ef4a76b62e50952f6775730483dab0a33853b5b. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QT4HF2500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46986a90e939b6a49a4dbb290c1423752b119d0867266f74ca31f8636f6352da. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:13:06Z), 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/QT4HF2500130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e304af36609811da3b06fc9d09fde65466b890f3c926b0606232a8ed967351. 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/QT4HF2500154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0199ca660f497e03078b9951898b4ccf33ab27a13b6986a073b1302d9acc554. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QT4HF2500155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956167666f40756cbe35cc0b05ba5e53dce5766bde59127487e04456b066afe4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT4HF2500156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9762d275621503171e1ccd813232f0dd89c2a9729502a9800d0498d5d964899b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT4HF2500157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf784cecec9cbea0512ea16511fce081487e99eabe1e63bfa7455bd4082221e80. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT4HF2500158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0258e17fb21a961a8077bec77b87a3b42bff42d5a92f7ba3389938b862dfd1a4. 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/QT4HF2500159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa199c8091b8c6569737aab56af00fd93cbcc28f2ec2f29350fba6ba72cdaa437. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:01:04Z), 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/QT4HF2500160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f456130ff733e8645b9809847454fcec56187dcff3eaea57a6b2e1e3f6fdb6. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QT4HF2500161.