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 0x4d30155c7e877091d12168ce7c3f000b8ad80c69c89c1b356287150b1b926e39. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc64aa7b-339c-48a4-b0b0-71db4e32ce0f.json and https://artists.proofprofile.net/proofs/artist/dc64aa7b-339c-48a4-b0b0-71db4e32ce0f.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 0xcb9fe74f8556dc597bbc7399ab6910fefb9c6200d0d6990f869f9305bc9abacc. 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/QZFYZ2336140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9103fdf0c807c8356c85eeff488b097837aa15ae882b1312237ef31107ae0d. 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/QZK6K2393463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fc5a9da29452bd645e3f2d265ccea568479983cbabe5d7c4dda6fd200eb002. 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/QZK6K2393464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d342806424938610e6557e22da2999251ce1a52000b000f6c057acf111f5a21. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-21T23:03:54Z), 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/QZK6K2393465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f67657fd8c1ef094c5be029654240dd242d4ba87f548e960cb61af8829e1260. 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/QZK6K2393466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffcd570eaa09721efb961a76cdcc3a5ac4436f7f3fd9e1fcfb2cea16ef1a662. 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/QZDA42343528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f2938ae12a06f3fef0e40569c85922dc4c42fd15c6d9e1a24a693fec4541ac. 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/QZES52222650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5acf074ff15da70be7d13986ebae1a2ba95b262800c1336b71c1798dabb7f12. 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/QZK6K2393467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72aad39bd2a6aaf012ef8196407af06ebd6db72b23c74973b8190b4b7aa0291. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/ES75E2405165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98af07bcb3df9a2b1147d5f504754e9ffe581dade2358cf2a7d955e31bdb991f. 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/ES75E2403877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0d8a1e248f835046919a31e0f99be4e0d92055febf4cc8b601746c37710fc3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES75E2307360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6f8d47383a0f14933d6aca3f552b0f7379548de07dcc5d0e0b33fdc52f4359. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES75E2305994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffcd570eaa09721efb961a76cdcc3a5ac4436f7f3fd9e1fcfb2cea16ef1a662. 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/QZDA42343528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9fe74f8556dc597bbc7399ab6910fefb9c6200d0d6990f869f9305bc9abacc. 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/QZFYZ2336140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94344bbd498b9c97c6e91743e56a7fad6cffd285c327670ea6d73ecf32cfb349. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZK6F2224392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f2938ae12a06f3fef0e40569c85922dc4c42fd15c6d9e1a24a693fec4541ac. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:14:34Z), 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/QZES52222650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b33d0b9b5f713d0cdc34d93074447494afab2b0361e3f27b068a74c04ad81a4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZTAT2109386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3366a4f5f8f6fc1316577e5a4ba598c8025a431aab0385494a6891dd430e946c. 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/QZMEQ2146377.