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 0x4dc1dd0460b151e6e9290799e2474ee54896ba350c249cedb91d59ff057df5a8. 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/072d3c8c-a890-480a-9531-3a9e533826ca.json and https://artists.proofprofile.net/proofs/artist/072d3c8c-a890-480a-9531-3a9e533826ca.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 0x899f9390375b4158ffade2ac27012763fe4a31a9dc74ea537ac6505076fc02f2. 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/QZH351900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040b62eae74080074c8daac6f6194bff94181ec4663349438c12910ab55af8cd. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZH351900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973ef7772a54b2cd561547fd905d2588c65dad5af028cbffc415e5a0636240c2. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZH351900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2674000a261b5a6d905998c80922b9b5365e7bdef4e026e8cf06b6c03d1ae1d8. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/TCAFL2197906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79a8396ecc8590929b329e72976ea1e0a61fc881b2f89e5b4b5570e8beaaebf. 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/TCAGH2211265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b0713952008c1b6f608424020a70b48259518686e4262615223c5937a1faf5. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZEQU2268045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ed7fdaf8989f1a7529a43989e973fb534530906c5e3f194f454adbc1af52a3. 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/QZEQU2300226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad321cdaf24a16409d1ea3d1bb29f32805b90e25842c42b0c21b9c56d60c600b. 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/QZEQU2300334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ed7fdaf8989f1a7529a43989e973fb534530906c5e3f194f454adbc1af52a3. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZEQU2300226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79a8396ecc8590929b329e72976ea1e0a61fc881b2f89e5b4b5570e8beaaebf. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAGH2211265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089ab2136e53a8399215735333e38a4a2b4058c7916c3e6bb2192f2e34596afe. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:45:40Z), 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/QZYG82300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad321cdaf24a16409d1ea3d1bb29f32805b90e25842c42b0c21b9c56d60c600b. 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/QZEQU2300334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b0713952008c1b6f608424020a70b48259518686e4262615223c5937a1faf5. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:39:14Z), 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/QZEQU2268045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f66df6b9c4ee27be45be1c5cfbc38b6c1172ea7dc48260110143ca873175e24. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZYG82300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeae8b36e283d24901f187eee3a46143f5dd0e59a9c013866078dc56d9bbea37. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZYG82300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeae8b36e283d24901f187eee3a46143f5dd0e59a9c013866078dc56d9bbea37. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZYG82300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89bd07e1f92735a92e2c4a5f640f2848db0469caf83a3702bd4ecfa5abfd269. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZYG82300118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecbecf131f366547392dd3afcf069076a0528781fe43d65e6be7e49058ffb4d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:59:55Z), 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/QZYG82500126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1b023e56583436c6518ce6071726fe9c1bf9ebe4658ef91505cb21f01bcea5. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:50:29Z), 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/QZYG82500127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f66df6b9c4ee27be45be1c5cfbc38b6c1172ea7dc48260110143ca873175e24. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZYG82300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc56179e4b2f30f3baef4faa6d6e194b3afbf1cd594fa22ea09d5d33c5600a3. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZYG82500128.