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 0xb08a2652e0d23696474acb37e7815c45b7e1c9609dc017ec5f7f35cbd6470ea6. 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/a689fb2b-25cd-4212-86ee-12c394bd1e54.json and https://artists.proofprofile.net/proofs/artist/a689fb2b-25cd-4212-86ee-12c394bd1e54.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 0x159eac580b86405ad37cf8c97299e80cf3ce005f827251204e5f808b070ff811. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:36:02Z), 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/UKZGC2309862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16450ac4e723cf74314e1994e0b69411c9cfbf81ccb248dfb9f8bdb2e5f09a7b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USANG2408591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887cba8a8c9f734c8fd3f71a39691aeb3773e55f21fffa8cc75fd480b2302fd4. 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/NLX9G2400439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d9e60c5314e49ed559f0820657aa1ffe4004d4dd1141d95a436c4739076dad. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLX9G2400444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f53aa2678178e7213983a87dc3b0903e1cfd18a21d7e6927b177d098412b3e4. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/NLX9G2400447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5844cec1a29a6deec0f24bcea201df20c1f936e326af2b7a2aac84106dbb6a8a. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/US3DF2505185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb9828ff0ea3c9aee9abeab18df4efda1bb56f73c09766dc94cf80e143e1457. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US3DF2560732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c52bf7997a7286aa6f44bb2fa0c488b206f36227192c4bac18345af49eade5e. 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/US3DF2560734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3158bb44b4ad3a58205b21744421589cf1073d0940ec5a0d91af4b9ec19a9c35. 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/US3DF2560737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534ed8f7d74b0a76cdc4930ce4a487a619284a577b38fbc9bf59646cbd0f62d3. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/US3DF2560742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7243809b68c7456941b6ea2321ecfad212ec976d4376c06cfeac940849e16200. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:18:40Z), 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/US3DF2540687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa955289873bada0fb38bbbe46994430873803a71aad25419bcf19c2eb7f099e9. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:57:40Z), 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/US3DF2540011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d5ccff939e9ee391cec6b4a6fdd052c47af8cbf19e93547aeab70bfd11eafc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZVEM1803976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d5ccff939e9ee391cec6b4a6fdd052c47af8cbf19e93547aeab70bfd11eafc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZVEM1803976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf96b1640d1cc18063f0c859b884e5709b905bc870ff77b4f9b2679b89beee6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX8KD2562904.