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 0xe058228c02e79c115dbc2f7564feb9f497e936b827813bcf474c529ba20ec5bb. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d33c4094-1a4f-411f-b388-339c244d6059.json and https://artists.proofprofile.net/proofs/artist/d33c4094-1a4f-411f-b388-339c244d6059.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 0x3cad092085334593547621d72f37a530f07151d76bfa25f901e6ae0ebf559745. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G2247847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7349fe5bb3d97cc9410fef5301b0abe7648ad739f6496557fb13ddf1c9fce29c. 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/ES71G1923523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3324f1ebf3c3233020e5c0e531ede9df5ca667925e90a95c775a2578ec038b5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G2050708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eecca28c945f92c2bd93e892ea5544dc47415d6295df65ea9ba5ca0ac228489. 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/USA2P2350530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990cde03a21cd5b721cbc851d3f53ac199acb6d2370ed16d03cfaef0ff0891e8. 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/USA2P2340813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7737962a0386c38e73b01f0a680c971fbf18bb8d7f44cd2bc2b2a4bb5a82aeaf. 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/USA2P2334771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4e181e0492669669e6ef8f8f28c3f4478dc01bb8ae004d60e97c8d23364f82. 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/ES71G2302848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb002127499faeaef64691c402195c8bdd41d4755166bdc11fb2dc957be3edca6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ES71G2224999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fe2bbf896f864f25c38e735bd5bdfe6f0daeb4c3607110ad9000a2b107ef52. 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/ES71G2208055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca5918b993027f50231d293b39909190914882f1cc5c72d537e201ca06f3a92. 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/ES71G2152565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7842422cd948f05469b259151ce403b00e1d64fa186a53a4fcaaa431742ad56. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QMDA62118321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc46e56bb5b00b61803ccc9c74f35c230e938683a5172a1f4324f10c89d8daeb. 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/ES71G2059042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6f0451ac99f51482592ed9488bb85ce41669bc2c4600a01a68398b605707f7. 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/ES71G2048557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0107fea10e09308ec9cd8c3db5889dbcee452992e0f54dca30b6220739ad110c. 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/ES71G2001106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb58303d896e180137b70e87654073ff95befb47f9ebdc91c360d4d6090334d3. 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/ES71G1861270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c427936ba387cf00c7630939547164a8c151ef88f12911cab655195b55896ab. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G1870250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc2881fc94fac673047b02ea5a3aa581b52eacd009772f3b637c935ab4af4ed. 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/ES71G1864430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e413ed16e09368fe109263fd0654d0ce1f6d95a698cefb4ae6c2c32d5dcf15f. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/ES71G1864429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4159cd260cf6ed0c9e58dcfeda1ef603526965c2b61114c7904b2f6ab86ec098. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/ES71G1866423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90f2b313b7fd7a1396d2e1cf90c8bfc72efdcb0be14c27b87c924f1ad59c0d2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES71G1861508.