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 0xad3a852d6a78b80a88a7df54edb955e72381c02c9d220f1d81f902279de9b390. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/930e4ba7-76da-4db4-b3d7-c2d9ea0a0d1e.json and https://artists.proofprofile.net/proofs/artist/930e4ba7-76da-4db4-b3d7-c2d9ea0a0d1e.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 0x5796acfe49078448e5e5e1c80357143053d0ab3ccacc8d0173432717bee450bb. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZMZ92489137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1ccc9ac7b14cbfdf63fc957e0d4993874c21da9541d20f200d3e2d97194305. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMZ92489138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91dc50c6c4843e4633faf2bd6c42d9ac7e0f6e15be3b4e91f39197468b3f4f3. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:05:44Z), 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/QZNJX2446423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480b6c8884d0dd52561d2118febcdc37af57a2099ae317be8bb209ce1a2a273e. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZNJX2446427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30345b1c8ca1c6536aef389b0b3cacdee8080e2b7c9e766cdacb8d7f2447b6a. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:49:39Z), 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/QZNJX2446428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4daa88a6f37558665276be7555602a8e1d334f12361bd657d42b92950bd770. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:12:10Z), 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/US7VG2385203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a797a806b0b22f26e3c465b1164bd125251ea9799a5cd7bf1fe57dff6a059ee. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/US7VG2385204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd440f7ad166c9622f239462f12a9896c94dfa53534cb872a2e5db84296cd1189. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/US7VG2385205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31d87ed56da9523cc2f2ce31178825a26546eb39df7ea8b518545fd05f241b7. 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/US7VG2385206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdb8fb8e085c2e536e7d932eec4ff90eb65a56dd0c01755d7dbcc65ca76f731. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/US7VG2385207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187f196a9cbcaac85b76e4f56fe9c4b43e80e5a705554c6fd486c5617dd9bd55. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMZ92308074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65dec12e7662ed84e55ffba181a30405181d997312fa62ecd4ec89a7c2e7413. 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/QZMZ92308075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9187b47f7e31aa8339816268711713c3b1a98aa5af35ed05dbf79d3125cd28. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZMZ92308078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e1ad6ad4117b561f3ef71c134b1fc72423b944ebe940821ef9a62ab14ba9f4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMZ92308080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7892fcf00e593a0f7cc9bc14690ba18d8b76855385739f167bebc664d4f3b523. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZMZ92308081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf89210eaf007f0b0efe907e5e317be29918fc5cc50fa21ebf8da16d824d70d6. 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/QZMZ92308082.