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 0x18912418284816c2417249dd17827ef380f67ec108f337a7e220cba8f78a7b14. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1bbb076-c264-4b46-ad9d-604bac554991.json and https://artists.proofprofile.net/proofs/artist/f1bbb076-c264-4b46-ad9d-604bac554991.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 0x06a9c46e93bd12a71e4b9022acc15e6d09f3938c6427e2117fe806030a9a2d3f. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/NLRD52118329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8872a4553ebf0e309ae04aade1ce9cdc121e14fe2c6a9f3b4c910228502a1d8. 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/NL1ZN2201595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf8ec1e5a21f256b7da87e2a5d05e81a00f8a2c9eff80762524efdb7af6934e. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GBKQU2271082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6a10f816a3b7e7d92d57d0fbbc05a36137be2b6d6d55fd0699173ab943464c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:01:32Z), 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/GBLV62201097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf167389712ea57dfe512a741065e37b6adbb06f4a4e02827980e76a886b7efca. 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/USLD91743494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb69b98302317a5515e3d60c0d50718833763fd9d61a64eff8b90beef376dff4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:40:08Z), 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/GBTDG1302663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90daad090f15fb9902657b9fb8756c6ddd0cb260d2d2b4cfe45dcc1e2f06286. 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/GBTDG1302762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acef0e3a21f8d0903510880b605951fbe8016e19dc4d2daf1550f4ed633249e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US38Y2306038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327831684513015f24dca4f82448730dd238e8e7220597ea893358e466ebcec3. 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/USLQ22180662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e858fb921a54412a731cfe967f63ff72e266f2adc894430900498347bbfb1a. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/USLD91764648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1e8936e1eb23ed0fd988ada8ca71a2133d76ac3368c4a5c29f59eab4893496. 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/BEHP42300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc64c36e3087d8f36964cad5947202517968237fb38f1036f030409c3148fe2. 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/GX8452200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc64c36e3087d8f36964cad5947202517968237fb38f1036f030409c3148fe2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GX8452200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf167389712ea57dfe512a741065e37b6adbb06f4a4e02827980e76a886b7efca. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USLD91743494.