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 0xa74c570648ef34cc9ed831489b0df2ac704237cd01e99845c3538aa947040ec6. 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/19a06951-ce18-4869-bc31-f821b905ad95.json and https://artists.proofprofile.net/proofs/artist/19a06951-ce18-4869-bc31-f821b905ad95.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 0xf7d6f87ef2b00493fd9c8af7d01361541fdbea39bda04a57bb97869d4770e013. 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/GXBDT2410312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcf82f624993cdfabe948810dd019970713ffa4a3b14d608fe372cf736659ea. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:39:22Z), 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/QMFMF2423547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075d08a9cab7976fb03095f50a96c480072e00c33168155019b6dd84efd0ef19. 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/QM6MZ2512157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3c26eb2318818ce1624d576d2fdc9d5f38db5ebf3e0a5f6a727ce8f5fb1304. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:44:00Z), 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/CA5KR2529948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bccad7379cbde144eea07f88af8896832e2d68924dd5892e19bc47eb995b09e. 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/QM6P42582129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0130311d2b1289c344db5781b624bb1dcf40cc68b64ca737f583213ac8b1f0fa. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM6P42582130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc116b6046f5f2cbb460161a344d503312fdf3c0d98ba7e80e73e67192d181a. 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/USUYG1727500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168440aa78e898e51e08dfe4deb19a5785ffbeb620efe2277b9313e7c4f84eda. 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/QM7282558274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4986be8e644f4e7cae2c9de039e8e06f189c226a1afb15e8b9223e5272ab6a2a. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:19:31Z), 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/QMDA62542077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a830620046aa1943de1d0cdaa622aebdd50d03e47ca44a0a56a4ae09b7a44f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:17:26Z), 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/GXBAV2127004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59236d769462b5d0ab018b37883fe4f419347ee5959c38936ffa45690d5407de. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:28:57Z), 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/GXBAV2158301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedb98bf2eaaa5e8ba0f641efc49e98210c8232e408b844ba358459489e1e89c. 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/QZWFH2561292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d5e3f73f931a8bd1fc8a4de8f3b8accd4782d5935099e7b3087a7f070e7250. 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/GXBAV2012037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c96011627327925c8fcc209b2de53f85f8f51d2abf089527e0f5e110915588. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRX872597899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec6a4cb723dd10843e3c9c80a459b022fef34db9f4bd79a7c67c3205dc81ea1. 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/FRX872597901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadb43e16d9a00ace8a610bef41c24dee070d2d60d09cb6143fbe73826ef082e. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:45:34Z), 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/CA5KR2591741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29483dc571987f897c9aaedc7beaa76e9f539e5825c3af664cafe1679865f92a. 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/QT5M22596889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe3327cd2dbdfb52bba021a8863285e7a0685ebcc92b6c97925782883cb1146. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T23:01:35Z), 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/QT5M32526224.