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 0xcf5bc0bdd5eab59a8cece58474d8c92f1e76929cb4d7c0715feee79babeb4606. 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/bb074c41-baaf-47bd-8535-262f1ecd005a.json and https://artists.proofprofile.net/proofs/artist/bb074c41-baaf-47bd-8535-262f1ecd005a.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 0x63a38ac47e479e8d0c2ccdb52434753822bfaa636ce782fc5bb3033fd6ff8eeb. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:06:02Z), 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/USCGH1844017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb174b55ba07653779ac219f679cc6a9c3f20c0981575a9e43fff5cbc8a5e32d. 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/QM2PV1861572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2a8a6eae7c87bdbac04a2e0df0e1b2eecf337a7e0e147c4e37a23413660bb9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFYX1923182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3536864aee4e8dd037f4069852cf5501ddb605bb069af7cefacb0171f48407bf. 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/USHM91936039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918fc8257aa73460926d794f2cf7ec0ef4fc9c703e91dd01b027df65cc5bec25. 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/USDY42051073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a1be0abe023ca9d7201fc4c8aa0efa73be580a2f2b7c894dbca1e7ece6459d. 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/QM6P42041994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115dfe643704d9195433c10d858be746472fd97d04f1e3d27ba335325a07aa8b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN61989968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918fc8257aa73460926d794f2cf7ec0ef4fc9c703e91dd01b027df65cc5bec25. 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/USDY42051073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c458077094cd153e7850c90abb518854b1570a4a8f46466452a892b0067a59. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZFZ61902563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a1be0abe023ca9d7201fc4c8aa0efa73be580a2f2b7c894dbca1e7ece6459d. 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/QM6P42041994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93598beb3fe31ee606a26ccc7cdebf98ec6c25ed6b99fe14fa3cf2c617493131. 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/QZFYX2092575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6505ca90c288f968046dcfbd62382cfb62bfbe12fd9a1c9ffff87ba778e4de13. 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/QM4TW2100981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843614fb583000a6c5e543db949517e3e6043759539415811f3561b594d1991e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/COSO12200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3d6c99b16c88bfa7c3b0548f48d53f18ad806061e9e66de93958619a7dabdc. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/COSO12300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7913ff02622c7d4ad2b7abbbaa7705550a686883038d7d31722347a8e3216cce. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/COSO12300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843614fb583000a6c5e543db949517e3e6043759539415811f3561b594d1991e. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/COSO12200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3d6c99b16c88bfa7c3b0548f48d53f18ad806061e9e66de93958619a7dabdc. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/COSO12300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7913ff02622c7d4ad2b7abbbaa7705550a686883038d7d31722347a8e3216cce. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/COSO12300082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c62a849cd287f1a0c793b3c10608c2d55b49e08f2536be1a6f92704fcfe4b1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:22:49Z), 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/COSO12200155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916fd2fcbfd4d605befc2da9fc144384fc3bb1b0f06e271b62c34903623cdd8a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CNZ632400270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca92cea9caea38cd669634ba5c88d6527dba95108f4debfa5fd598114fdbad06. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/CNZ632400276.