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 0xb729dae61d6de6b7c4ec99d06af3818eb5214b890f06a8dc1eb7ef871941a668. 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/692e70c5-2d07-4845-a186-cea2f2c68d07.json and https://artists.proofprofile.net/proofs/artist/692e70c5-2d07-4845-a186-cea2f2c68d07.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 0xc24208f3aac3c91875dd9057190d7ec2312266c9c3a0646f431ee37885421013. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZDA71872307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be052fc12e70184b474fa48f35f446d424e4866399e270d96ea1614e7be2f25. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:28:41Z), 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/QZES51841614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0362f19fb41d7df12ec356c5126689aa94bc197d399ec437a9ab133a2d4c4f39. 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/QZDA81969300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0458ae0cc7d1abac7197eef9c1e6986068af987cc2ac66482f8a9d3ad4fc9bc0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFYX1941697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33f185776a0cb8e64cdfb4312348b546566c5ba206f4ad8c3536ac7ae9f8bfc. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHNB1962477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea9b88a3a08ca0ff6fde8ad970f9b5c427689c3bc93baaf0b35b5202ceecc55. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:03:01Z), 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/QZFYY2092197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75b2c14057a4ab74e3e78f8d958ffe0ad9491c0f3273eede006e5e71d78ca15. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZMER2086181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa8ed12d5ff4f64e5e0bc38d4a40b8221a4c315a5e75b5c7cf217a259a9db00. 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/QZNWS2010118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386d60060bab5b7816ac41da7b71e5e70a2bd8ec9bdfc8a1ce7a40f44978b222. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZDA62116473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cb0a64888d68ccc6aea92c0a043bf1c71054314db4ee5a27d4f79cf14bb2db. 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/QZDA62116474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97d53e06c9792886f458e4bee50f57b1d6291d02667e499cb6a4b234d855a24. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZFZ32120145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef26e20cabb82fa315b722d86b583eff387f319a0219d5971f977b58a30c7b2. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:36:01Z), 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/QZHN92213505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6d243e0215396b92ab9d8a11e79d12ea79337b2a142bf9a040fd6d33bb1348. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZTB22248324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5699c1289592394ade43e01d4ee16579c927f70f6d0402bfc42df3b45eaf61c. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZHNB2391281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98ae7577f497016d1938808813ec40adf51c4f92439b8e7af76c7885dc99614. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMEP2386888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b753e551bd39dca7ff1f4390c07f69f0f6e3b3b2ae0d14d3757f7bb061ac11. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZWFL2394559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc289ebff1060a271f23be1a10f9ff6d76dc0d0838ea382c1965abd0d153a3955. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTBE2430287.