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 0x51125ab7ca1765b3d10872ef961536c32677abb4c5c9062f1a51ba0cb68ebe58. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c06c782-a81b-47f1-9b8d-6959cf25d015.json and https://artists.proofprofile.net/proofs/artist/6c06c782-a81b-47f1-9b8d-6959cf25d015.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 0x8fdd086c841787f157e08214eb756133b48216daa19021984bcaf613dca28992. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATU371001001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93fba2334ee70b71028cd7897c1c3f5f6dd51082ec1a5b9abd88d3ceaafe618. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ATZ240820200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b27ae0077caee9c901fcc3aea8d365d7cd3739eda2dce8ab391206e2dd0ef8. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ATU371101010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfe68e5e12af7e6660c0073ede5e9abe39fa8988dd19c6bf74dec4623ebeed7. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ATU371101015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96737e1c55c74923b7ebab5ec38ee47a19749fbb4d0f65a0f0a3e85dc7db71d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATB150500261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd862c82b2a45097fd244602a51fb843b444a20851d12b6076a3cb964f20179e7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ATB150500310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2408c1fd3251c34b1e20faaba774db71d71d61726defa3f991430a5f727718b1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATS010401101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b590865979efbb7e2d2edbf6c38ae00ff08276461af51b4ab56680c1aa77aa. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ATB150500315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e4cbecc33d3f3575c6924f7ccf5388e280bca3c09e7accc3c060fea248529f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ATS019000307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657a2e708486551f1dd8803ec2f0ee9c3e9504ca23046e49e82361d4eb0a48a0. 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/ATS018900401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda55e200841fd56c3292df1625b2015d21f8ff7acbe10404b13ae61af4defd17. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATS018900407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659fb1f1a94747a57d270553e8708b772bc557ad694b742d7ed94c2dc1293541. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ATS018700104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa18c1e5820ea68b437493f189958a0d8a5820777b4e450ae5cfc3a62cd6cce. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ATS018700107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3af23c6067961245020ddb8e4afe3262eba8af39888d51dfd87b5f71fcb1b4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ATD712300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08497dec0c8f6547250b8fc4f01afa679e309bd9b9701cdb97b0422ae10fe083. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/ATD712300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cf9da7026fcb9256e020557b053411052c243f0d51693db4078b6b2e609a9a. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ATB152200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc954796c79205947366f6bf8fc3a4c65135cc05ba81f0e8400b2756e603319. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ATB152000863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e168be5ae7ea9955d07451332c662781abd3c471597285583265ba9060f107. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ATB151900426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584ef4897144e11bf60e4ab468b302cf9cd996cf882498eb583cd76c4b47d899. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/ATU871001001.
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