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 0x613468d80e8c1cdf3a34f4421ca5c9a97ff9484c2fbfbd4f164a23992d92fa7b. 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/351836b4-ba4d-46db-bd6a-e754da24e188.json and https://artists.proofprofile.net/proofs/artist/351836b4-ba4d-46db-bd6a-e754da24e188.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 0xf71d7bd3506acb7ce5ecbcad07aa952e33e5f85de322b2cb384bf99446e1758c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZEQU2149191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c24dd23649fbb303dbd1e48c73ccbb10f70d2d180f748b3832669cb5ac3560. 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/QZHZ62173141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9205db5a7a5d098c89d28b6cfdcfd9dcb04039cf7c16491786ba5bfabfffd2. 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/QZHZ62173143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6db02fff2f459400ce8346e4ceae00b2ea3a78c14ad5ac92b2aa5ef20db05a. 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/QZEQU2206034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd6d3242bacbc89641881af08fe7bdfb9556404bd36c9cfd65e07ef393edf17. 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/QZEQU2206035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadb2d1ebcdeaaeb36546a256367cf41d2715071c1963a5cd5b87804243b5bb3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZEQU2206036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99fe6e293a808db6d73125db16d42e75057dc97844b1e777965b7a10f73e5d5e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZEQU2209463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94f484dd01f699922c405fec8450f0afbce7b6b2967a692525058f109dc131a. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZEQU2222507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce2f0d9bec3e07f42179004861a0409d79cdcd5b6685e2491dc958df325f51c. 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/QZEQU2249470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb197584144215b67a901fdd2483c664bc8e414595bcb1406ede5b27b3a7aca65. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ESA112319716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c82b214a561ba72a011a78d4b40cb3f4e1373a017cc1b8ff1f2482d1ecce2f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:56:15Z), 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/ESA112319717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb3760a90d257c1c39cde82f31375b4eec4595471041c43b02783b23158fd52. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ESA112319718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c59cf32faaf2b23458cc6cc2a03070d8d9148837bbcbf468a59c426a8ea37d. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ESA112428630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0624b02b2dca39cbb3846b1d9cc990dda373250ac82a6cfda96aefefd06580. 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/ESA112428631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a926b5ab1d937c1e70226a411afc884b6d907f0e9368e49ace12707759bf25c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:41:54Z), 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/ESA112428632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb071f11ba8283f660e2cf2556f4da59627d8fa1d43abb16a35f6825ea4599a40. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/ESA112428633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f305c1827accec77748bfe7c449f23924ce515f1edcd9482c6603a39f566ce. 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/ESA112428635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520e55f21c0bdd8cd20fa9ac04bfe7b6c7be13f5f17f82c6525d628fded6d55b. 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/ESA112443354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bf56d49594814317d1344aefbc415ab363fa7194d7e578efd9ff8708166648. 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/ESA112444648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5335b11895aadc3a93f2784c6955665ffb419c68af54a4d1eaa341bb9e7bcffd. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ESA112444650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dcfe8135521a9780e16f58ebf1b8dcda777ff5f3b7965b5a28fe9d9b1c9fe9. 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/ESA112559241.