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 0x1665f98a91479e1aea7f0abf7edb08a6dba422e81cb89c09399936e2a4ab0f28. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d40a829a-f0e6-4cd2-a4bf-64c6696672b2.json and https://artists.proofprofile.net/proofs/artist/d40a829a-f0e6-4cd2-a4bf-64c6696672b2.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 0x332e14d85c48dfe2a8f29700ef2f4eb1a18f4ae10ed09a42a99420c1b265c7c3. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZK6P2484373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eaceb41dd1ff3e17bf60165ef5cb5a43cf69482a8748f498cc4df7be71bf14d. 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/QZK6N2456282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7311d58b839344c94c75562f88af7c08a1831f70b57f2b46c39fdec3a3122e. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZK6N2459655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f1c36c9371dcd2acaf8ee87d0678a5f1613f14fcc593b56213a7d010619588. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZK6K2411699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4e435b22b8d9c9277e21a882d9eeb507188cd91319be8b7d70c122c6202ac8. 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/QZMEN2424344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec34a8d12d693c0da161c5ed2600071e394db1bae943708ebdd33e4a26d9abc. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZK6J2417546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f526ed3d308b27683e6468979f1027935f4e29eede5c9962e19aff70b32521f. 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/QZK6J2403749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8003a64886bbda774b735406950ee1ae440c34bb5a36ea40de12318228758e25. 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/QZTAS2420829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e50833dfdd618f3b74bb31e604d385eb86d03ff74132c828d6d2aaeaac86cd. 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/QZTAS2420830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b74c8e775ba2cd32494d1af0aa97ed4d2c71aec9de8224800e3d6274bfd575b. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZTAS2420832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc16b527f108b0245ed1f5da350a07afd3c105c6edf1255091e148d625621b80. 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/QZTAS2420833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6159c2a4fc061551358306d0c2be1f051d49dc8dd6128e21d8e1b2899639dafe. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTAS2420834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e6ffea1378323cd10999ffe9d209174f9547a73712c2f5b6b49eadae286f54. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAS2420836.
No Honor Among Mercenaries - Vikingr Cadence
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6ac7fa825a763a228190cf04978e11cf03809323a5e1eda958e4a79fd7fe3a. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZTAZ2484048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ee8466a7df7cf176f3aada100c6b2ef213b4d592f71dceb960168141135ce2. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZTAZ2484049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1056e81fbf53ac37dd2694d4dfebde4d624c928651369f22681781484c853e9. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZTAZ2484050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9861c9d664698dfd332d78dec992dc4f0f42ecc933ad8e82228beba5c9efa8e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTAZ2484051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ae90256707313ddc9564483bb9d39e867714bf3f61e6c05426d195b155a834. 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/QZTAZ2484053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fa2a20b23cbce90184765b3e3add2995e86cbd647fc45bba34918e824ff17e. 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/QZTAZ2484054.