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 0xf2fd35e8959ceffefa7919ef5525a076478d0b57d754210d47116dbe1bb012f1. 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/95b42c26-6960-406e-918b-4763b5579669.json and https://artists.proofprofile.net/proofs/artist/95b42c26-6960-406e-918b-4763b5579669.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 0x523aee15fb6b419311a473e44b302697ec32474d7756364c903f6f506e27b50d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAFK2170530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b8283d363f0e03b4adcccdcbaba8e78678e97e70723b3d2fd9346def23e036. 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/TCAGB2286352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6962efc3de49a70df83cad8b69d7df8d31fe595d2ed7c82cfcd2fa355644967. 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/TCAGB2286367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f05ff2a07111746937ab4f3e421cd42fa8326e1be3913fc388f0663d6bff63c. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:24:24Z), 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/TCAGB2286383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e70fb97703202e620bfb1e9dab008436dd276dd7dbccadb5ca011733f241e0. 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/QZFYZ2362791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a0e3b4d7ffcd91fc309f4fa3ad7fa885c1f22eaf62823e785053542841f7af. 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/QZFYZ2362794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebd89356fa0d441a7181dd207052ea07993fa6084b12a69add109507e4d301d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFYZ2362795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c8ac83141a625abefa63144d35348b2dcb29891778997e43d7ddc1e004de8b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:08:42Z), 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/QZFYZ2362798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bb94ff419b5ae6c33f93e126a3553593783511f15b8793fb7b50cd87bcea54. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZFYZ2362800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949349f0f982b01af183b4aec99a62a93f49d27100a213611630683ab142a3a5. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZFYZ2359459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b5f44ab342825ca232c18556a57644429389de3fb8bef2b57615dbc9b3322b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFYZ2359465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc479359f66a6c6ccbd419da72b182170e330acea414ddda4808b083f3c72e315. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTPX2421510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3275e2c29473be4a0bf248a02d908057cf932db3e9cc6877ee6c7bda04aed2fd. 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/QZTPX2421511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64a6aade8724e59270f13eed41eb8e3f42a4af388e1d85092152cb3bee93efa. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTPX2421513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26cd314689a2cc52557b17df8d62c3613f542d7256b437f4286839e36dfa4f2. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZWFU2492575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9478cda7c875de7f7cf199ff2caa365fd682428027916ced0c07eebfe016678a. 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/QZNWR2592776.