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 0x3bfa087a8ecb09265b2539915031e0f1fdc53d4d207767e817195cc29314fa00. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46345b3b-9805-4e36-804d-5a3db2bdf970.json and https://artists.proofprofile.net/proofs/artist/46345b3b-9805-4e36-804d-5a3db2bdf970.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 0x07ab1fe0345cf8f7e7841c6a623dc7d5d32ed70ab3afb94cca2c2accdbcf3f33. 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/GBSMU5564814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf148aee87c7262b4327804e12bca437e49ba1cfdc3fff598499e124658070baa. 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/USA2P2508392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac370fe1c2c2ab8304d22e238cd6fce15c46397b8cd651c413e7900ef1d7fce. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USA2P2508400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3522708bff352f466a314ef0b7683edd0865cd93b1e229f6c60528b194e7184. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USA2P2508399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcf486c19117131e9b8b0d3742f96ad91e47f6136a72ab891c2044aa631e9f9. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USA2P2508398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf148aee87c7262b4327804e12bca437e49ba1cfdc3fff598499e124658070baa. 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/USA2P2508392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17d844dd686bad1e557dc06f8b488d6e56cab0b25302807adb016430c44611c. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USA2P2508397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2237a04e8e136ae5de31cfd889f4ead331d061166a766fcf6fe1cbb30ae8539f. 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/USA2P2508393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461406c432624bc8a463ff140801bb29bc86544f3e2e7cbd744f0cf2500b71ed. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/USA2P2508395.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528ab4dfdf79977601204c4c5c8d142064a5fe3b7cdf4014d6264c830e11f182. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/USA2P2508396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a3047e9a98d667c55182d4717f357d130fa558c1851efff15a2a8b8f738be6. 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/USA2P2508403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fee08f1049a9ab8e402b194e2a6eb7fb7cb213a2b3508a88b59d833b323267. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USA2P2508405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2191dfc584dd891c4d12e8bd781ae226f4e2662f7db0d2be2d3b820ebf61ccc. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USA2P2508394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3178513e0e3a2cc9e4daf64a1ba20d457e16d1afb7e6a28bc5e2cd41c8bdd03. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/USA2P2508404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50936126deb4f859118841b82cd218f5497d2d4c637fc9763de9d945293e5db. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USA2P2508402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3ed9d87d8dbe5882e484a5a9566ee87d2afed6c0ffe55da8cdc0936a7ba4ae. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/USA2P2508401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10f5ee32488fbd9695eb43052d558d333fcc15289fe0584f25470c0005dae5c. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/USA2P2508406.