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 0xd89d544e6afcfc93f1012539e308731d08727271e49394547a8ae158da784cac. 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/667f06f0-9fe7-4070-aacb-bd33dda74c45.json and https://artists.proofprofile.net/proofs/artist/667f06f0-9fe7-4070-aacb-bd33dda74c45.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 0x802ed54e7b409781b2d13117bd088a027de97b52699332c7939082088b41f355. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/INT632100174.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa9bac23f4e53c43bbfa28512974abf3a2904fb0fe8e0ad1d30b69a311c896b. 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/INT982208874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68825ed60455c61a244516807c761ceabb404d5d96e86c755ea6d5f9a9dfe0f5. Chain 2 (Bitcoin): anchored in block 957527 (2026-07-11T06:08:55Z), 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/INT982303306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40981464dd09193ca1491204ee054039b87c5bbf41a1d484eec2a6e1207adcdd. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/INT982303317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4084133c798170c5a5dbba97bef39ed0098a27f5da182f2345eeb519b68b42e8. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/INT982303332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cd656b3a1f2f79299695aba919b3ace83c69cb82c8777eb008d07e031fdfae. 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/INT982303334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550c35e0d28ba572a0f00e4c5071ddd078a9ca9f9d6673dd6c1988f02369460b. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/INT632302346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b53d7a6ddf8903e8f582a955d2c1549bb0087d870083d295fb4e74dc534592. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:08:53Z), 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/ING212407109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273d6475e51d1a32b80fb3a6dcdd5644aa9248620a87408e4653b459776aa20a. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:34:03Z), 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/INM1Q2422188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198a164d7417f76d4ad511407942a585506f91bf7a4cbe068fbfbd940e0c2191. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:12:23Z), 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/INT982534667.