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 0x8879e6a9b064ce1ccadd38629208e1e89821eff42f02c9a0c83f1ea26e489d91. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2ceddfd-720e-4e16-b397-9d9a112c5f9f.json and https://artists.proofprofile.net/proofs/artist/f2ceddfd-720e-4e16-b397-9d9a112c5f9f.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 0xa5dfe8934a4c916129e544adc0bcff2b65f6f1f38c492332e112404877a3782a. 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/TCAHU2489691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77fa77db4fa1b880280cb941299c569b115a26b10037d546aa60e5a3cb6cfd8. 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/TCAHR2309035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b719c92fa948e4a35d512e54eafdfb544db98dd38858d0439b785cf903cf54. 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/TCAEF1923079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb4c42f5bad9cb54511ba7b7a62097a0531260c75029db4bcb89585d2227baa. 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/TCAEF1923125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0312590eb5886a1815862a1454aa5e72d770de2f354ab832cce2bd3ab60a089e. 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/TCAHA2360316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8c000a00edc47a9ec674a7fabd85d47656414eae7681eb76bf69950a4b56d8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:35:20Z), 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/TCAII2481842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77fa77db4fa1b880280cb941299c569b115a26b10037d546aa60e5a3cb6cfd8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAHR2309035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64d0f80364c90ecd19e06f226b48de25af2116d24ebc6203ac84cccb4334b33. 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/TCAGZ2361972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560fc5291bc097c424569651ec4ac4cf7b6a4a67b393317106ec07b863d13b63. 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/TCAGO2262535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a795c87ce7e51b3747774f29ac6344de3740167cbeb1c010b5554fff677b93. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:00:57Z), 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/TCAGP2288420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560fc5291bc097c424569651ec4ac4cf7b6a4a67b393317106ec07b863d13b63. 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/TCAGO2262535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc241f473c44a913080e765e1d15f8f1eebe733f14e351b95a7c7b385e680d75b. 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/TCAEM1929355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6fb19d8c345b5f269915815faa6f0513b60efb4b9cbc227f8321bfe5d187e3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCADU1816363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc3c12e720d63f09520dc9433ff2362c5d7586a5ff38e459d84907ddcf4aaf9. 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/TCADT1837672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b66b88bb7c561312978e19becc0ff87636df360bf51fa443400326fa3087fc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCADC1742962.