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 0x88573a801b7befd823c9a15eb450bd3bc4174b951ecd914f050b8e4a7e23670a. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81f3bdd5-464e-4b25-a2dd-5e58e867fb9a.json and https://artists.proofprofile.net/proofs/artist/81f3bdd5-464e-4b25-a2dd-5e58e867fb9a.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 0xffe596c3bc00735805e9e98d2cd01154ec98141c016250dba8ed94ab0d681601. 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/QZRP52270307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e68d8b23a7b7b2b4927d2ef006261e9233ce8d67d91a95483eca8d044826d7. 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/QZRP52270308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e23b02169e5374a121023d2c2981e64ac35143c770ff96b1d2621d5f46c378. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:23:47Z), 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/QZRP52270310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fac1fe05f722849c4fc980ca8dc49ac26bbe912fae4890b6d7f536a9067dea0. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:01:30Z), 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/QZTB32280657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25f8453774a1e889a1a1cd7b0f0596d135b465811699c9837c6125e02d89800. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:10:52Z), 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/QZTB32280658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50081ecf147602cb80d01d7c3606cf7f1b877ca4e22f2e7031c4b962efe0765e. 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/QZTB32280660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4c01fc70e4a5c7c7b26b71f0935c0e42fd17405ea68b101e46636fa38f3bd5. 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/QM42K2331842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb784eb8c0796c11151c6c431ea60a3f4a6b4c3020c93085d99368be1f49844f8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHNB2357942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b9c8fc9fe24a59b1b3075f8ea643876a7b212fe0533516a329d982410fdf4e. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:52:56Z), 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/QZHNB2357943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a85c9e3e1c4a2acc48a34613eb4e5385b1dbca726b720b06c309eadefa03fa. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZHNB2357944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c39bf5c4b8711e7f5d66979fbff095214d381b3d92ff56765b4c3910bf243f. 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/QZHNB2357946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed931a6ef02e15fde9bd206ab2fb6485043a76bdceb6b32beeb1c3c5b54f16ff. 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/QZTAY2302366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119451ee5c81dd478e136ffb486c76a8c9ecf2c216c2d6f4d070cb88a595f41a. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZTAY2302367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe782b1f861bf138b14ec84b073f8e63a3824e63a1dc4f56ef6225615645b8891. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZTAY2302368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f85223dda26d15705e74b36a24994cfbdb6b9a71cbce21e388a3484e0e3928c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:50:46Z), 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/QZTAY2302369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b581c30df08d2c15f49b82d07cbcbb31fa3fb4320fc228c53f0f384df49ee11. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTAY2302373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9f112238c99169aff8fd8afcc90966877dc8d4d41ebdbe8529c2a1e69dd639. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTAY2302375.