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 0xd10a7d7c124b6c8e64140b2cecf8473605e4dcfd56f85f05d55dbe25a2fd595d. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48e779e0-2373-4f99-80c9-2730b08155bb.json and https://artists.proofprofile.net/proofs/artist/48e779e0-2373-4f99-80c9-2730b08155bb.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 0x998a97d6cd181b4eb45a9bc2134f05752dfe2d9613b3fe462e317dd2f75d1ea8. 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/BRRWF1900064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9952b5a0d628007ea790da73b5656dc1c4088abb6e50afaf325787e85e29165f. 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/BRRWF1900066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc3d4b7d8a9727b8d8389d92b1cd39beef0bbc25811ddb3fb7a9c4393c518bc. 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/BRRWF1900069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92014ef79ed548f3c333df3abfac55ac4e9182dcec7f570b95824e112098363. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:47:48Z), 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/BRRWF1900054.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ca6578ed18782b996d0a56e5fa01baab06f5ec72c4d2fcbaff0acd59ec257d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BRRWF1900063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bc266f0b812cdb2c15e0e5694cf48c43d8a0c80c6cd0f4ee5631a5988c3026. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRRWF1900065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b0488b307329a81c422ca25285fb90962c1c5a2ee9853a25d1a2df50eaed15. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BRRWF1900067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2c5bef7f52f74fb9beb5d9c5a692f28b3bd73048f11d09eb587808f3f4ad57. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/BRRWF1900068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7580f633803a913e4fe0b9b1f1ba76c956eae60dbe8e148a28502f62e3606b6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BRRWF2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304661a45479c86b385ce54d433a43f3e131159be30eab5c3f4d0a141a2006aa. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BRRWF1900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500c8d678a90899a5a7200d48db3445d55889be1c9e9fa6c3d08ef5a61e2af02. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRRWF1900071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34abf97dfc1f3913f552fefcfaa7341daa0f25052d3dfbcd789c1014f26468f0. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BRRWF1900072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0bcd5f11995162f58012660372f8c4ed4dd2acc79b0ac46831b793533f875e. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/BRRWF1900073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfb85f7ef100e957fff134df7d9e06c52640b320072760cbab9a5901f0bedfc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRRWF1900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d43576736b1c00a1525b43a0af34fba40d067ba073b0171a472e111454b35b. 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/BRRWF1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6232b7679634bb224ef072588f8648cc911840427579a89721945998c012bc. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/BRRWF1900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce6433101d6d35048d4ab4a1372ba334e0bb25ca648a785c54cccac99b05d74. 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/BRRWF1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862b3f1689bf00f30e28e25ade7dc0ef6137e01e2753b22ec6045cba7c222a5f. 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/BRRWF1900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c4c4758643b342b8a246f06898b5cf99cd32097e11dd1ea49265eb0a68bbe5. 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/BRRWF1900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43859e1a246764d46299ee86ade8f53f940eb1ba797057012895c244037c1ae. 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/BRRWF1900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca49651f75defcc85fef57ef63a9cccc72ff91bd3ec9ee8ba16553cd9c6e633b. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/BRRWF1900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7fd9c13c18a3459ad78a31b0583d5653d5c175c0459fa50f6db336d23f4bea. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/BRRWF1900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcedf254ba1d3522d3c4141a8ede2b69c987aadab2a9f60f1149042cbf51565. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BRRWF1900003.