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 0xd420efae1dd900cdc0c0091a38658cef48288dc3e292ac3c67ce3173cbb2276e. 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/2ad39181-df09-4dfb-a1e4-b8c213142ced.json and https://artists.proofprofile.net/proofs/artist/2ad39181-df09-4dfb-a1e4-b8c213142ced.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 0xd97f41827a4f1b77273cf5477707ab0688dff779381d91f9cefac3103c9fa697. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZFZ42192912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa2c482b75d2fdb09469df254b27e933dd497a5813a3c1a51536580ca6e85b8. 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/QZNWX2193849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424da846d8b0c810dff82a2a2299a68b01e1e6b9cc2c19d431584f999ae00d03. 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/QZK6K2307588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2dcb0f6b94335728d5dda23788397326816caef17a18e9fc8e46f319dd661c5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMER2334317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb566017802b4a5da96097eecf09c72e57d5fc5da929c69ab3fa1328388efb412. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZNWS2355157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5a32b0763320956ddb76c7740750417d6e3918ad3ca95bb1bf426c4cf8d682. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZFZ22486753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36305c051719d9f9c7f76d8b6b11934e015568ad07d0a0ef7d602fdaa94cc4bb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN62485305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c86f59b59cab913f8356d9efbcf9791b740cbd9382f1b84f3da046925276227. 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/QZHNC2403420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4620030c9d09b01a2a9ae193ec14e0161c1a5a77548322a01e02d74739ad4acf. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZK6K2479561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1c0ad710871a07e63391d282fb91d5a5aa36f50acf6eca37aad0c5938cb22c. 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/QZMEQ2479737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51d1f1373c5a26acbc90ddb5c95e8c8fd57c5089edadf2b48f3aaefdeda2f0b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTB62408569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6af94cc09697d9bd4b87866555adb9c012f76e21112388b91bc40d83dc0136. 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/QZTBD2425901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80ed1b9b7546eb028b12cbf9b8cc0c75522c6c5f833a174735f61ab3cfa7a39. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFK2464968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4534681c274b430ce31de12997a7503ccc9a1d722daf19fc80edcd7e2336256. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ772445857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b99cffa012912443bf9a785d884a5a16ee3b13b2d6b7474df6035e421414122. 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/QZZ7P2474804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdab62ae8676615bb339859105407ec95fe12d91082b31a53255dd5268c60f1. 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/QZES62504850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4688695c9b38dd9fffe158f077bba8b67734c464967f04c5e89e707a3d2ddd. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:28:46Z), 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/QZHNA2547239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15843a80d2d201a50cfd92be6f0ad4d790fb2de5ed331e0f8894460eeb5c0958. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZK6K2508249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1443912a89920f82cf17c9e6ffb367bbb1604d8898fab5bfaad6e338a2b8f0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-19T23:55:29Z), 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/QZMEQ2563118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78f97235580720e73bc91a8bc06f79a58fbe8a6f9f622c4758077b22fb2900c. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNWW2517447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba31c04d8446906d42121aebd53ab76c99687dac8adb9588c4447a2f22b67f1. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZWFM2548239.