1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x4be1c5fa260339a1be82379a45d7dca733e99c8a988da022db44a7f0df3a8928. 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/c27e4ed2-d80b-4dc7-8320-0280ec51f4fd.json and https://artists.proofprofile.net/proofs/artist/c27e4ed2-d80b-4dc7-8320-0280ec51f4fd.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 → block OTSBitcoinBlock must exist at that height 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 0xf44effbfe7bf50b1d2f3782aa5931e8360a71d44e7607b932225d1593d384651. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGH2055336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83266d9db5ea2b627f88fa935c2ddb9e7fc73756ee30e00c3f3656b50961f78. 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/USCGH2055338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca3959620d733dbc46038da061b8661637938f0e184e864cb9956485b63f676. 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/USCGH2055339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a8742cba7c2ada43a6481a1afad8903e597def7f0908ba48853e38deb25476. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/USCGH2055341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd9f14b72211ed9b4ef53f46828bba63d848fbca86426cebea1888a6ed14be4. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:04:29Z), 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/USJMZ2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e1306ee9eb9331953702048f4aecdfd5ca067e246d2357dd10ea26a16aced9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:50:20Z), 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/USJMZ2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83828ce016a22e6194251d4acfd75e74e6ea6c18635da9b46bb19559423058ea. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:01Z), 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/USHM92143788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad001e3e067ebc68598e337d85d6298490f045691d07fee6a5f3f33406e0d92d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USJMZ2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852aa800288af1eccaf2008c17287af105210b4164b4d9f163f3b38170b762d5. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:44:27Z), 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/USJMZ2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8ffc4075fb63123f37fcf127faa9b25a8923427fe41f5b080fc40ac101fc0b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USJMZ2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c59c965d7c56a63785c10e315850bcd6a9553f8f27970b5c7994a228c6b582e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USJMZ2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb274fe09be3bb7bd5ea8255258ae8d08b1975b817af00e08191626163188a69. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USJMZ2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f24f6575bf0b9fbb8758f665bd7e62d2c6eef2491331b6556795afb42f49431. 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/USJMZ2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a78d39b4a9e8eda6be85077cf9ac28948aa05b5e0bafb6d5bca7bd3f4b99d74. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:30:55Z), 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/USJMZ2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e45994b0e0eeba1816523d223d24f6f2c8d81e9bf7ec4971a505af2bb30cfc0. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/USJMZ2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399747499f5b84682bceec82928706f4c95b0a93b18eda4151b949982c761cc7. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QM99V2410202.