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 0xab59a267551d824176405806f635bc074113423b99bf0aec142bf892cfb09af2. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/40ee6dc8-4265-4744-bd96-a047f704a417.json and https://artists.proofprofile.net/proofs/artist/40ee6dc8-4265-4744-bd96-a047f704a417.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 0x72eb5f98bc644722d4e2622824becefb848c10a206952c665d9ce15dfbc38659. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/UKZGC2308000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97ed117d54b7f27a65a07289940fbec44dc5e042d02f83f727017aa82de67f9. 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/US3DF2460418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b520cd8da6dbafe2238fdf8f78f7dc83cfcaa9a7d1bb9e41573d5c362ea9ffe. 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/USANG2441807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbc6e7c1caf68eb396d9b0ece05b45fba784a6daa7d8679857dbf8b98097fe4. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/GX8LE2593739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ae40096b9ee4ccc2182fe83d490449fff2c0bfdca6594e2724810d1d44b6f5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QMANG2238633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3298bfaa3463804b047f09e39e91a241c285e17d5a3c1fff22b1c629b0fee672. 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/QM3DF2280656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48021db0fb9bd6e9737bf23d9488dcf27694e6395daa0f071544b814a099bc75. 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/QMANG2239611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd561741c2976b64459daa9f53ed1ff28fffabb5f2ed4d1187a21678a1446ef13. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMANG2245806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7b3c0b30ce740325adffd758f481d9049ebe7688b53aed2eb3e21aedfb57a1. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USANG2272394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9278e3127154589266a5460c4667109b11354038797401ad76dce0d9110ccc7. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/US3DF2441004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548e1997508a3b32581cad94dfa54cdc15a36ed1fc5ca7932983cf79920161dd. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/US3DF2422556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed47093ca4a0de330479a3f1ceae7826cc81e03c0213e50c89239e51c426ec2. 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/USANG2261948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b520cd8da6dbafe2238fdf8f78f7dc83cfcaa9a7d1bb9e41573d5c362ea9ffe. 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/USANG2441807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd00309da76bab2f357e0482157ca42e4ec6430df40c9c0874a078de368e05ee. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USANG2496589.
Leveza Records: 1 Year of Spreading Lightness
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50206f7d681a58313f9810a6511a72b134f5196aeaf28bf0b94443c53642b90. 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/US3DF2520396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548e1997508a3b32581cad94dfa54cdc15a36ed1fc5ca7932983cf79920161dd. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/US3DF2422556.