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 0xa9f3d9352fb27eda1f8e99660f75a7046210ceb896273326d9bac999fcf6d2c5. 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/900b2364-fe71-47c6-b8a0-c9136dcafa89.json and https://artists.proofprofile.net/proofs/artist/900b2364-fe71-47c6-b8a0-c9136dcafa89.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 0xc476d1ec09fd8865205f55d812e4c64bf53ede68ba28f01fc03a9bbfb96cc9d6. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/ARHXW2100563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd66af6d58857f3bd7afef9537154e4e2cb4fc103b982ea3ba16ff8fdd6a8f6. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ARHXW2100566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408398f755c9246f57c5b77e9fedb08f778ebf0833848de9db4f96fcab1a076c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:45:25Z), 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/ARHXW2100567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec45a2ab4d8ab91e191cdaae6a13c5fded3c80c1c99458fdc34e7d97f30b6a5f. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ARHXW2100568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02af81e07a09f5e30e7e5f4ea2a281267b28baa98bee24fc2eddb0a8bd28419d. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:25:36Z), 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/ARHXW2100571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31219a0582ef7bd63b9e59bc31858f635dc42998b294e40ca53b0fd062807c8. 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/SE62M2202634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f2ac18ddb505cd8ec81be213470a555da4b71524752b55736c008975eeabf6. 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/SE62M2202638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9d636b383b146eae48ca8d50194a2b883dfdfa5f3b775262f98bde320b2741. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SE62M2202643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4c561d2dc459a1e3e84fc8aee64160c3f406bae753bad0c9ef19b25a77fd69. 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/SE62M2202644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edff444e39bd16184ece3385d51e3c68f725d7c9be65d67ff6851c46b46f449. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SE62M2202632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2abaf818b38663dbd838b8c06c6f0e723e4b1719c3ec3d3fc531988f7f9c682. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/SE62M2202633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f2ac18ddb505cd8ec81be213470a555da4b71524752b55736c008975eeabf6. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:01:02Z), 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/SE62M2202638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7103bd101d364aaa568d4abf68cd516ac97cf92a440641e3e3e23ee0315f11c1. 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/QZNJV2332276.