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 0xc541cc5b0cbc09287345e99fc1104b0bd62717ecd78abe92331076c8c0793f56. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c35678cf-f2f4-44be-af22-22872f41282c.json and https://artists.proofprofile.net/proofs/artist/c35678cf-f2f4-44be-af22-22872f41282c.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 0x1376568fc8096f98f380250361d8eb3c7f346906971b906b2a337a72ef8bafc3. 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/GBTQV1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7239af7daef159e80da4a9fdfd12e5730f463c8a426a21a60ea9451d4fb9fbd. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/GBTQV1700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe136b224c104f6161f5467f49eaf97361088c0e6367327de32239ff3177cf977. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/GBTQV1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0c51b0efa6352173540f15cfd8ef423bb8569581ab68552644ee88a14194c6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:07:08Z), 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/GBTQV1700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fd98b94c78da4585788f52148fdb8da5d017227e37c98786fa7bbd1d37e3ef. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/GBTQV1700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c913816bf486f3ea1e4640c07f7898d717537996d4dcba68ef726bcae892e2. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZFZ22337388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce84c2700f7f0511c287c18276618c9da93c690bd4cd731c65bf22bd2ea62485. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/NL1PX2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2420d3f309906155a901cde4a0d2b1faf4b9376c0963fe698d887200c7e65fe. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:53:24Z), 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/NL1PX2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6523aee7a8dbe2531ec50dc6d42e455432b666246d08e55dd100d353a7aa229d. 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/NL1PX2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0ceb7b39b6c00790516b0e7290db139667e7c7450f27512324a5bc3c7a1e09. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:58:53Z), 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/NL1PX2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230e2b4552b5caae6c567d9411766d680df85804d492f25e3370a9c2bd3684a6. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/NL1PX2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cca067804a25cba8086ad377e8126fbca9aec6a3aa4a54576a0c1bfac11a1ab. 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/NL1PX2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11afca8c32da6da242728cbc77cebf757093630510890ac94a894895e7863042. 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/GBU4B1100034.