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 0x07e1d487a9035942e14f4aca2f8eeb6111f92959bdb3885498b46b264dfba6cb. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87d918df-c5e8-4240-a2f3-75b57471046a.json and https://artists.proofprofile.net/proofs/artist/87d918df-c5e8-4240-a2f3-75b57471046a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sweetheart (Never Have I Struggled So Hard)
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 0x3100682e1cd0589178c85deb2f12a725b1594a5f208f18dccd0d0fd0fd91832d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBKPL2201973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8a83bdf3be19715b48c98c66fc7295050aa6a845731a7c07fed5af815e79af. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UK9AV2201315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece7d3ad35c7d56933f38a520ca174697f4bf47c2b7b633cade65f7031d414a4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UK9AV2201312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e3fdba612fb685948aadc8bae3edd348279d571aa41c8c7bf4d5fd72349778. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/UK9AV2201311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4618f6909464488f1708caadda017181038fc6d6f4f49aeeadf76a2e585cd2df. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM6P42320635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9ab522cb13b46fa560d2214cc9727931c3f491b094fc1c465ee5739135d0d1. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QM6P42320639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452a60c9fcf2d772c6bc80f2da4ca94d0b9c4bde5797db468527284fcb9666c5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM6MZ2394455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3eb3996408eb3d5a44e2e67af890383989440455068347b2d56e0f7caec4a88. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QM6P42320659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8ca274338bfcebce640fdf29afc23d96a39057f72972fa357dfd7ca80f7892. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:31:15Z), 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/QM6P42320660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77f543c90dc71558208acb6d4af0b51ca34b10a22fd3ffd922494d9c40aebf8. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:46:54Z), 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/QMFME2370114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e19ee846af2472220f898739ee8cab6b8f41bfbf5bb189b03b64556bceb00d. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QMFME2370115.