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 0xc86b5bc6c80636f3ece4a6d518b16018fba399e87dc569c015642461cc925659. 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/622de3ee-283a-4f01-aa10-3b6318e0dd93.json and https://artists.proofprofile.net/proofs/artist/622de3ee-283a-4f01-aa10-3b6318e0dd93.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 0x5a1bde1357d2a63b8e01404262098248c19202ffad3f480403990c45debc1d9f. 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/AUGBT2240627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c3bd3c86bd796519aa54a2dc6e9dd35684768aaa526016096386685bc43b84. 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/AUGBT2240629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ea30f5fad3a6b09ec92c559a34cadf6a245b84fc3c4e73aecd6483e3f14878. 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/AUGBT2240630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e34e37c9ba7fbd84703c3131a343f0ce6a6212d5a70a3b2bddc9deef041cde1. 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/AUGBT2240633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac324ab5847bbdf52ef378b08074d3c89286da5d09347588dcfc05f6676e628b. 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/AUGBT2240634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381ea056f940a020c9d27f5221c8396961fbe58795e6701ebb8c1f0559e3ce57. 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/AUGBT2240636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8545f2309143ea3482903f4f6ac32fcea751c26ece057ee89c3f47a3edfe3ec. 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/AUGBT2240638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772a24e239a61d1b0deaf367734bd3d059cf0963e12e294f2a71911712662d14. 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/AUGBT2232130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04c90f1d76c5d6b1095fc91f32fd103283762efd6d10b4d59fcb790db2486b4. 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/AUGBT2232131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b6be08bd3c3e99eb451cf01d0e4d6613c44f07631c4e534cd79a959db6329a. 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/AUGBT2232132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2803fc0a51400f4fef6c91ebbbf792cc1bf36dc8a85ec40cdb0cbfe65cec8058. 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/AUGBT2232134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61cb899f4c8945ade1313612fddd93150565858370e6327d6b142a72bdce8d9. 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/AUGBT2232136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2dddf0e57b0bf5aeb92551dad237fa37c47a631c1c6902f8e8ebe357a1506c. 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/AUGBT2230588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71273cb81334156248f10720a5bec9c190c8f51d2ee2a9565e2c287a427174d4. 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/AUGBT2230589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862b1a74a73d47d0ceca5567206bb568b1cf7d925b09e40cab36b3cc06baa736. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/AUGBT2230592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07188793b3ac5f3c740f1b4a3ff7778cff529c7656043abecf9a5351cd893a93. 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/AUGBT2230594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404186278ea99c8026dad2500474201518e6c2b2a2d40fccd2ce9ca4045836a1. 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/AUGBT2230596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f0451bcfffeef905eaa15fd2697c4b13e1fb42ed15c3ff91715e01d8c73a0d. 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/AUGBT2230597.