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 0x6f5fa1e64699596fb6d4a0949d0cc683011c7a9d28a7c7f50f9b434978831ee1. 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/ed7bc3e6-5f47-4ec4-8f97-8f0d2a6d0141.json and https://artists.proofprofile.net/proofs/artist/ed7bc3e6-5f47-4ec4-8f97-8f0d2a6d0141.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 0x360f5615f437e3691b9500cb2cf8430dd9bb8174df349c88301c8333496fd553. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZ9JZ1771197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fb5e4af4fd23ac41113b4877eae646fc34180105b7760ebc8f9c753079d5e3. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZ9JZ1771198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b91e4fddfd947a59678f2a3578be10de61f4bfd9783c1fd36a4a046a246713f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZ9JZ1771205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4d1a029bd7585e377cb13b7553b9b85e081e1db7bf024a08e138765422b925. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZ9JZ1771211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508d2419c246a1eb4046d3dbc6ae0ce443e8962bcd1bf12b01602f27ee2ad104. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZB4J1856511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82caea289beaf8b35cf765b62e1639204ddc2039b80c8ce0d092baf7620567f. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZB4J1856517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebccd2c5f478089b4a5684f6ee8a28a36f3bc8429ae3cf2ce0a83d017405a6ae. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ21902749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc217fd712e7c6194f3de9fb6f42e410fd25ef388fc4638d5c4f8a1a487c52a0. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAGI2233273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f1ba4799e4ee11124f775da3492c815de0990cf130b89de80b82558c1875de. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAGF2274947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5323860eb0acc6793d34e5a2ffdbe0a04ab5696b40fe7d50e038736952eff1. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/USLPR2301143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e17af779277c1e38c3c63e0a61db8b613cdfa431c175edb40b80dd6db3d8638. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QM6P42459463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701c5f3d2edff0f3c2ecd947beccd45b111ddd668a8d8613622e7e491a2e0bc5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM7282465016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8e87cd2d43ed3313e42766aa0a7fe613334c28e92bec7e7d58f08f69746f56. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMBZ92461144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9daa65f18c628785d77ffa0dab20de55ea50db43e70451c000a2354b5b1e77a4. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMDA62451672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701c5f3d2edff0f3c2ecd947beccd45b111ddd668a8d8613622e7e491a2e0bc5. 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/QM7282465016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51b9d5961d7fb9dbd53b28df852e617403834744bc10a6f66f1cef7dd971bfc. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QMDA62451676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8e87cd2d43ed3313e42766aa0a7fe613334c28e92bec7e7d58f08f69746f56. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMBZ92461144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8186abdb1c9c780200ab59d835e3b7a5a81aec087eb6447106a47422a020a629. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMDA62451659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71dc16111c102b490e6499ee482558427b93514a55d169c49887f771166ec4a9. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/QMDA62451660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0eb2a113eb6a18ab6b1997ece260664926d7573e5fe4fb94976dac3a3dda9cc. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QMDA62451661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e17af779277c1e38c3c63e0a61db8b613cdfa431c175edb40b80dd6db3d8638. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QM6P42459463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5fb716fd8bf180bc335d08e3acf2942102ebe29e8a4ff649f69203978c36f7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMDA62451669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3591232fb62aeb426f2d8386dcc612bbf16cf6db393d0ad8df37dbc7e37d5faa. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USHM91976333.