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 0x25e764b690ae171d3a78b78a587faff5529f0b0e285c7605062d34386bff5cf3. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8826054f-ec58-4cf9-b267-9fb25d1a8cb0.json and https://artists.proofprofile.net/proofs/artist/8826054f-ec58-4cf9-b267-9fb25d1a8cb0.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 0xa626a815f01039acacf7b722cc2963f45bbd5113d402af158ade4a15f507794c. 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/ITR631800375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba40f4d58613dec25e4411ebaa519c06fe5ccbf85055b14518f9ef5ff9b6462. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/IT8TZ1923804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7767fddf3616493ae6f9fcb4692625d76515b6d4f12ba70863a9b84755aaa94b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/IT8TZ1923807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452f7ac640aba6456b9f79d685a6d20ddf323743a1899695a7deec49d4739093. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/IT8TZ1927101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2efce7c080afbd20525040b42320c1a31eb68998a877564d7f0f2199680d65. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/ITZ0X2090218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5050b5ba50be7c39e911df0014652b3f5c59974651d24547073995401802be. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:54:44Z), 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/ITZ0X2090166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b781408ed5d088c3c8ffe6d3196ac5cdf48ce00fb89c3a8dbff18715329fb6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITZ0X2090226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77d959b4fa643834899b2b1309ed0cb19df8ef044bead955672ca73878d55e4. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ITZ0X2190132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2dcba3fae6eb263ee616a6a5c1b987a5b482ca8c268bbf318d6781cad6eccf7. 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/ITZ0X2290038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09bf4c4f5d7f3e559e51533ad168a5020044fff9dc1d753b8c546bb070be8fd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ITZ0X2290188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b92bfa22da66e94a51bf1c30f4b7ebf614976483ffeb48a9c345f71dc51a686. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:26:54Z), 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/ITZ0X2390166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddc169e9870ed031bedd00a39e360b9475f2097d327b294733eccf7da4d4324. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:48:46Z), 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/ITZ0X2390173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53ffc24bdcc1ac510d682bb45912b26efdc6fe67956de492b1fc8f330193ffe. Chain 2 (Bitcoin): anchored in block 957527 (2026-07-11T06:08:55Z), 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/ITZ0X2290366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3cb265c7ee7428193fc7ec4856e0fabd63103d229f47cea5c57b793df73222. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/ITZ0X2390139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6673a036ed97b85da0555329cab8b9c072aecaa5bc18253db7658e21243414. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITZ0X2390591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b580a0982e02e047aa64ae281b0a523e9c3e00ec761dbc336905ff497f377e. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:34:01Z), 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/ITZ0X2490269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ae4381a114d4a23f004d65faf1062915a996b51a81d773026c9e3798e4dfad. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ITZ0X2590799.