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 0x4a5394f0f90592b979b85dc45eb6ade0d4fdecce8e04ea6eb5e4e4e0653ba9c1. 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/fc2d7430-5423-4d06-be71-851d464afff1.json and https://artists.proofprofile.net/proofs/artist/fc2d7430-5423-4d06-be71-851d464afff1.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 0x0734e79304a5f36774288c7762597788c5ea3085ff6fd52c5d700fac07638639. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:37:00Z), 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/QZFYZ2044008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb2e92905fdb2cc8eded9fff198a8c178a69a8fb3c917fc8e8656e33d25e175. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZFZ42345181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02c4d0441809e777edbceeb870f80572fb17df618269b0d1723db535a4fb0c2. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:53:23Z), 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/QZK6Q2088832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb124647921d1d1706edb0c4befbaa237626a32d73f0db0806e0f0485762c449. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZNWZ2023684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd032df74d0275700777c33c4de4cf55db4fda57bde091533d095219b6ff7dc88. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZFZ62115601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a36c39195be62795f8d04e378b7d23356240378c6b9997564ab9c6db25f01f. 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/TRA162100579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6348fee7ef48e649b6c0f3fd331e4448a81b010b4ffc8fafe675068601859ac7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR96X2351854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a04c9305ae1e9ed4654392bb718fff30b6c8e23ce009fdf035275bcd181b1c8. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/FRX452359928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9206cb578a7f80a320f3c2e7d2ab2f12d186a423148c01daa6974419502154f6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6G2386228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa291e340046fde9c6be701715a36b7d00b064ed2e4048bed669bd862ef182ea7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:32:35Z), 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/DGA072301175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d3a801acf1b5cc1afee3bf3a91c2b90318152ca0e6f7e34e12a41994fbdc81. 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/QZWFE2371197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b5e746ecfe97a034469344e7fbbf1860b621fbcd1043c29fa12f157f677fe6. 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/QZFYZ2488626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe362d5f75462d1c7016341c3acf6187e6abd4828b5629690e22f8f1708c5f177. 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/DGA082448010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb143c4b98eef0c408d9f0f3c0cdfaf4376db053fae585cded0fdc45529dc44d1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DGA092442001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf2fc33809fe55afbdff89419982aa540115765c70cc275f327ca1fb21d26fa. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR10S2523596.