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 0xa01bb8bc77e35d9f009ad0b42c96ac794366dd5a59ce80448e1d00edc74f5675. 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/a1a1f095-ef43-4187-8745-e5bf74b87f9b.json and https://artists.proofprofile.net/proofs/artist/a1a1f095-ef43-4187-8745-e5bf74b87f9b.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 0x35e85b57e07857e9ea8b071ba76704c3d6eb33a7b97926f418a78b1895796504. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWW2217813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf178d587ad7681bd7ed91afea6772af0fd9ea5f62d4dd50f2c24f0b0c628ad. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTB62247694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf178d587ad7681bd7ed91afea6772af0fd9ea5f62d4dd50f2c24f0b0c628ad. 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/QZTB62247694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41f01e97a2d676dc25f9fd1ec46b4929dcdb3e8e3244d9e3c244f78ffd11c05. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHNA2343542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212e281337364f0ba25651488b7223953927e02429b4f2c2686b444619f6fe02. 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/QZTBE2432035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8797abd939b800a9a59c19f03e9d948c885cd4b59a3f5cf3f8ae3dc42465ce42. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZZ7U2473576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c6bc376672092b5c990824ef53092c387ccd688b26726c216b4e8fdc07f55f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ7U2473578.
dichotomy (come back) [platinum edition]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec5f09d146b2da0dfb23857223da60b7dcd19ff726d220f4163dcc0e1981d5a. 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/QZHN42522909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56ea6b55bdd60a14e19ca3e139b1e87332cbf36027ed339656ab897677fbb88. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZHN72530071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf276001d652d8d6bdc3bee3118066c52d58de381693bf41a26da957bc4a69b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZHN82565902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf276001d652d8d6bdc3bee3118066c52d58de381693bf41a26da957bc4a69b. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZHN82565902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba6d83db7a63f85576b5f1d8a03d1737eda70ff4348c2c34309085560b77a01. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEN2583433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf198ba3153222efa662b3abd4ed5c85217fad34deab154ee0a921c5287f0c0b9. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZNWV2519748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb161b38017767eb603249f663afd42fdab8b28e3b86d9136f746b62665aa7e4b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTB22530942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ebc46bb9ddbc6a0e5e1ee3b26431005648ce1994bb92c2855cf673b1ce1a53. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFZ72230523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc8ba04c4f8755e0925279f065ebdec0937a51900b1e0a098fdddee929b8621. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZMER2342640.