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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 0xd81799c95e2c35b8d428c6d685ea1a814e8e8961db557d4d0e89b3fe019235e1. 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/19a96a76-92ee-49b5-a43b-63c4504fc104.json and https://artists.proofprofile.net/proofs/artist/19a96a76-92ee-49b5-a43b-63c4504fc104.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 0x848300ceb116997ba484f9523640d120b2106f448ae9ee246bb91a03417d7c9f. 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/QMFMF2305434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e79f53dfbd5bdc36978d814aa455e1bb953c029491ae34ddaf1f4e5f8386d6b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ7B82200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bf11086b88029bf37658647469c4158300fd8de689776da54e767272e2c390. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFMG2353317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9843d4a37a11410ac4044a4d8d1f60146014e5b784da9e7030b941fbecdcfd92. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWA32200406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1d55c277d74d7b35aac86ef4cc485c011284f99121d3ee152a94357f26f484. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLRD52203267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7ef141605ba7e1a873c650f0b20e2f44686c391c8629c08db69a1dff6ea6c3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM6MZ2300607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1d55c277d74d7b35aac86ef4cc485c011284f99121d3ee152a94357f26f484. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLRD52203267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad6a22a9049990de8d6b944b229ead9a982f47fd7e8cda3ab0d20bdfaa2bfc2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMBZ92270335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d817858be442440ac6480d4b3e31e999a98cb9fcb05c47eeeb5f4659bc31bc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMBZ92250159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0b7331fe3da804fb58dffd2acb4e88601d10b292f603873e1cc374ba466a76. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TX2344398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c41c227520ae8b84bc74377f4d68704934a5e2ebf230b928f0e2555598c94e1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TX2266109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedc586015da3efc6a6d10e1cb875201e75ddf8c27fd17161c000a4c8452c527. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMBZ92396150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9394dde37df7429ea52cd3b4c27ee3ba4de75c0c1d5bbea26c0a5612234b65ea. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TW2344902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6d70e37bdf6f8f12fe67ac0a810cdc1a38fdd9cb5134d809ae7c7e280d47fd. 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/QMDA72159372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633522750fd41552a8c85f07ef7f645cf0413f381cfbb67d93f3d6cb69b879d0. 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/CA5KR2053306.