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 0x7dccd93bd11b606ea2a5e51d2c8ce2944c3840b73fba490c807e9fd7f130002c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d079c7f-b64b-4620-9296-1ba8688135df.json and https://artists.proofprofile.net/proofs/artist/1d079c7f-b64b-4620-9296-1ba8688135df.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 0xebda2afc4107256dddbdefd219d62fc9130fa37c7cd4481bd2ab693ba589ebeb. 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/FRX871592420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320680ae02e4a281eb56c56b2c405c0a5f3f30a49bd5c9367f9b3eb7172a74a7. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/FRX871592422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5991dce395252b447f03bffb007e81f1e6ae5fe0765684d7fca092a42cd8eb. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), 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/FRX871592425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c4e77b847e1fae84383db4d942db49e90835b0e8966bad5fb6d867835726af4. 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/FRX871592426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5afd7f4457c166515b57f1e8bfd725c19502361dcbc7e95f11dc6be044e86b. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/FRX871592433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd795f85ed4d9bdd821294ca3736bd5891664570fd3aceaa41ff5979ee295ba. 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/FRX871592436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5881d791c1807bf99f5666748ad7f28728a2f1671dd896a33c332e14e218c963. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FRX871592438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416d3bee010b41f92f9b998c570b4f061966099c963eb5fef76cd77b9eb0dbef. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/FRX871592440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edf55712da53df4ea3624e148a3a4781af70beb48d3ca161d8b005c9f23c92d. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:38:40Z), 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/FRX871592441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63802b8f9d5b853a6ba933362ed816650bacd0875fd9f7b592f42d757d7c869. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/FRX871592443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1448f29e0609e2b07e5eaa83c757dbd7f2aab5c7783d9747a9349e38cf3362. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/USCGH1434462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c414d12fbcfe95797350ae3addbfe2c2f075a71fc0c09856c51488d27a70ae. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USCGH1434463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96737278fcedb3df500ddafcbfa803923a470fc0b7dedacf446d8209ac083a85. Chain 2 (Bitcoin): anchored in block 957728 (2026-07-12T16:20:40Z), 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/USCGH1434469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266c3d697b20ec1b3b835171f3973e5209259f31838b7e00ceb8543cac3ec5c1. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZMHM2022834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283fb97a4d5ed9892057a4580bf32a2fbba2aa7fa9ba651860ed10becea616c2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AUHNH1700077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267f4a1cc7536c8963819c5450a0e7019d5fdd5e9b8280442cd5e7fff4abea38. 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/AUHNH1700085.