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 0x44512678d200492796a47e10ccdeaa302aadd9a833daec8803d4da2f9fa4a7ab. 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/7fe8b7f2-9289-4e1a-ac06-8e1b9443ba82.json and https://artists.proofprofile.net/proofs/artist/7fe8b7f2-9289-4e1a-ac06-8e1b9443ba82.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 0x8208b551235d805446e0193b46b1dc09296f707529a97d08258ae404bb2e2bea. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:40:11Z), 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/QZFYX1990865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174bc7faa8e91f905cd419bf2c784d27ce569f43c1af3ed48dad0ebeb4e61c8d. 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/QZDA62065771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10a5489fcb6d0c6ea1d6bb519b9dc15b3a35f3440ee4c11344c58885986cc9d. 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/CAWHO2018246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd8dd02a981cbb1486d547d2d8a616262df6fb8cc46d2acd8a6f25cf283d73d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:22:22Z), 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/NLD682100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2be946392bfbbf1412b1749dcfb8c7201a9c0b32502bd5b5d092499b3b13f42. 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/QZHNA2164355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558a2ce87227a95a12e87beb4184cb1938505c874616625515bd4a134d621879. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/NLD682201075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20707064dc69eb1acdc985256ca51b9609de99f0c5f29cd720f038002d0faac5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6P2289998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76941b264c169f1795666df76d3f61c9d15a6e9974ba173f73e373a6d9144ad9. 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/QZTB52215166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f367c91e160e19273b31896e10f4566a799d6980607c5a52250d188d5d0091b. 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/QZTB52215167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cc405ae865e32c91df6d841492fc3be03ca29edd697a11e839f77f9217d3b9. 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/QZTB52215168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b54347086d63351b96b0704eadfa25386851c7413683c5ee478e60a8691051. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLD682300451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154f959857262ff4ab80805d8c48eda578459f91a275154996ce1bb8d50e9178. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:47:02Z), 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/QM42K2300783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b115fdfd7f7ec073772232910bdfa64c86ee432778d90960e5ff66355370f7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFJ2352503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c593c856ebdfed2e6ff028b038e211da21cde2231d9e476e2b2b12c9c4fa276. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZFYX2443351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df1cc6618a3635d34f83793c4655a29583df24c697a0f36669440d61a5db295. 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/QZFYX2443352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04599ef4bdbff46b08a9e7411fc8d34d4617af1c0c9330c97525beb17e267e38. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:57:52Z), 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/QZFYX2443354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e112b0e9ea6cbd0a8159f30e1d86a83e2de3300f2baf42d3ea7181f8324ba5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NL9KQ2390332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39e4e42ab114272bc0a8be6db7ebfa0db023b98b79e1fc6b7fd1454b42f507a. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/CH7812542366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a54a1078c281ac721feceb1435f46945019599b5cc2c77a9ef3b706f6f1bde. 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/NLT2H2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff81ba04d12c7b48bfc4da317d0bf48c44e6742f6d1968acfe0e7509ccc51bee. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/NLT2H2100931.