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 0x2051dd6cd4827e282576e297cd30aa851aa2f9c00bd94ebd9cbfbe9c96c806ed. 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/29daaaf4-c764-42a5-acd8-daab57c62afc.json and https://artists.proofprofile.net/proofs/artist/29daaaf4-c764-42a5-acd8-daab57c62afc.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 0xd26b765b3dbb8e7a6fae8fefef639cc832fd332f3b629afd34aacdf1b3857d0a. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T15:40:51Z), 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/QZFZ72124059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787df54e107c967feff15b560d5e2a54a85e42e1b4fc89b745553ccf363ce2cb. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZNWT2166227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba6341997ca47c6b9af041e354b4a2ef7194c42e2629a3f9ab76f9f5ee8ad1f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZNWU2152792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955c55bd562446d9669356929a0a733491ebc7874e037a959cc6fa3ea7175947. 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/QZNWU2152794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4577cc202b50f42f941241925b7cd68b2181d7b68e7603b3a1306cfdc2d1104. 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/QZNWU2152797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e155ee402f07eb9457fd238d61867436f28803b7f4fbc1d8d84ee5baaa83e0. 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/QZNWU2152801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c129b7b278049c24e06204a4d2fe8d66fa412eb857ee2f2005e21c8f3c0a06. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZNWU2152802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d1d0a5358007631ce78c2a73684c00cd3955245fbf6e9d271bac2e20e9d7b8. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZNWU2152809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b281e870f7b96c3249afa79eefb12c41de6eca6c63341e59bdad902898ba988. 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/QZNWU2265633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed8b168e88c377a17e8267d10ed8461f44f40f704107e1e284d3cadaf6fc06d. 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/QZTAT2237279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d0c8ec954b516c98a7cf2d891bd87f216a933fd5ae87642f6db07374e80301. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZTAT2237280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d677e5f1cef231bb8a80cb3af290d0f6d642e683dd04a01449680028317f853. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTB82237624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8782991228cedcc65314426d2562d771342cf282b00079dd788c52522684c7. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:09:08Z), 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/QZTB82237625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6396be67fa40d2fbf976513738bc73c61da6efbfd2c70191c2d2e7b15bcf5625. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:19:50Z), 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/QZTB82237626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a53b582410382549237a68ab63685ac8d2554e8fa40df4a5a8ecd651ed7fe3c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZTB82237628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d7a198506619dd0a3e2353b3bfd04c4973b6ed4923d8137fa74611c1114408. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:40:31Z), 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/QZTB82237630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22749edd6296008a98a866876ecb7970ff138af75e9808eb7af444d8441ac5f6. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZTB82237631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3be77762d223cccbf5805e5dbf5980238038425cbfe2e4076a3487c16f5b6f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTB82237632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77ae912f45619c7771fcee3e6420d8f1e2665f082caa11d054491be9ea4ae33. 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/QZTB82237635.