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 0xdd9584e66714bc7fa9100f66a6df5e357f67fa2304db92723df5f554ac81b4ae. 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/8cfdf817-7374-4c29-bdf5-f8d01203533e.json and https://artists.proofprofile.net/proofs/artist/8cfdf817-7374-4c29-bdf5-f8d01203533e.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 0x3f15ddb21a590dfd58a45292b53fa0ea59bfab9a7e21f4ba6110aeb1f10d4d2e. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/USDY42193307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314b500bdabbd51357550cec8d9e966e5ef7329f9e40c79914a67caba3d6b007. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USDY42193315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84570e6cdff8f9559750ec19eb7114c03d9b592c69870feec7f3983d61bf165. 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/USDY42180744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3028b91bd5518c9a8bc6db78debc72aee2b88eac33d58fee32ba86ed7c6dd46. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:30:52Z), 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/USDY42180745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8d6b04a869ca336e8038e902e6b6a2a5a163f2c914ba901c0c2af3a81e5f26. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/USDY42180746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3733a560c9833cac77157df6d19f720721c4bdcdf809eb1118acee787ff580a. 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/USDY42180748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a74b8bddb9019c8bd00b319b8e2c4941f696da7f5ef304d53503abc98b6bd4. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:11:02Z), 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/USDY42180749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb1589da0bbc803066d987df959f08d483708fd1e7b707e4a3d04b09e5ec84f. 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/USHM22126064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e66c08be0e77c493bd68c6db617be7ec4344dd6e1410f2c53265d4bc1c44786. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:17:05Z), 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/USHM22126065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98a060444eae2314cf7f54764e68d122ba1a36d47a44f2201eaa36b664f3bf8. 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/USHM22126066.