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 0xf3ef4591d3b26199b83498e7199facba88683f094150470908b5899fea239c4b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0b87951-b518-4c17-aff6-45f5bb97a498.json and https://artists.proofprofile.net/proofs/artist/c0b87951-b518-4c17-aff6-45f5bb97a498.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 0x1a469a379470cc0b16180efba71a674ed10aba66066e8cded0aa3d1579ea8c7d. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:28:02Z), 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/USASN0661001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8be5afe90f4858d0d323f71d98bb97b0faa2e2932a227e127b7e71ddf81c03. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USASN0661002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c66b6b6ce567fe6ef2fc004caa49e24356205774113c23439a7c8374110d0e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USASN0661003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f51e03adf9a2f63729e07fcfc4793dc72abf1570d80cff8b68861349f5adc6. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/USASN0661004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2d3bcf7ec810e510aadcc6ee0fa533e2880628621d0405f329b2f73e45d576. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/USASN0661005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfd0b7034e46a1a46d6dd8143eaec6489ee326931883a0156035597cd69d099. 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/USASN0661006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02cc7696188361bab0a2a853a12234d6fb38c40d1698a886693da55d7993dc5. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:10:41Z), 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/USASN0661007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc962c0d0c8069a75f62771e61e77604e46c5d68de828e75a76fc74f84f5693d0. 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/USASN0661008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4cd7ca52b2b7ed3e3d153417a43a58174ce4fce0d62f8c3a321c662042d8c0. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:41:53Z), 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/USASN0661009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27982a5697bcbd88fc196588167c9fb4c95cac597afcbc129e1eb74d9c504cd. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:26:17Z), 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/USASN0661010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca866f1b1159f3008f877bb2539549356905f5f87209990df366894a6f82de21. 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/USDHM2113742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0379baf420a8082ba132cddb24d99fa73a8fa4629bab9878e6be9f27e87c21e. 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/USDHM2100528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc202f76b2b3a757f05d1ed3e1c8024932934488b9ed5e5e33b63e4c5595cadc7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USDHM2101828.