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 0x43d0a52b31031e14f3d861711593eca7d1ac730d5c966b1abecc0729694e675c. 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/cf68b2e5-1100-42fd-ac94-da15ac4c68c0.json and https://artists.proofprofile.net/proofs/artist/cf68b2e5-1100-42fd-ac94-da15ac4c68c0.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 0xbf902d85e218d62cb25cff8f15644f85f45dff1386ff4a7dfc1526e68e0f7d75. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6XW2176927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbeca2da645ae59738721e72af68034e15c862b0cc8fae1bede1897c23f0a717. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/SE66N2255014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57515c6245e3514ce96db177408d66861ac9329c5e3e6b906edc177c4e7de004. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:56:05Z), 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/SE66N2255017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c8c2cd452f0948b4981186d02d46ad98b12fac0fca9b9b9d0f50c5f226d05d. 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/SE5752309360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273286f911dbae1765ef61049f9111ec17dbc880238b563aced7446b63590abf. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:04:09Z), 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/SE6QE2415763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47456bedc87a26a82d1616942dc1d64a2de68c1034145e4eee5970f0a76788b3. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/SE5BU2407663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d929485783613d66362c45ddd814db16d9e6bd990dfa97255142d39b96a7b59. 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/SE5BU2458667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125e599e13ce7b56f3ca0384ab1876cb374379551d6b36227ebfc6fd8d57a5fc. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/SE5752495011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f06c496f905d30ddd41c0fa942d64798affe853e51a556c6cc7f3a50a502568. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SE5752495012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba81eef7ada0181824846fd69a112b7824e2e04a7626422faf311d851e40efe. 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/SE5752424594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c7ce854f13774eef11e808baf6be579e45b73a9ff8da43ca095d9d2c0b116f. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:51:41Z), 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/SE5752495014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7c3d4bd409e2985bbd2fb366100cd533046fdc1d1011986cfd8c0e0e31cecd. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/SE5752495015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7381f24fba9aaa94141a34b9c90594463e986255014da88b835188fd70c6042. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:39:03Z), 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/SE5752495016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989d2c62803fd148733d8f3fecc894238374c6d8b66821ab7b3bd23a5dd4bafa. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE5752495017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1458ceaa80a09e35f7219344e2365b55208fc3aee7c906f4f746f15a0189ce. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:32:11Z), 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/SE5752495018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7880435be4c9c00f7a7ec64ba7d58dac366a1fd252daf969c385737d93844f. 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/SE6I32462032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b736fa61b507b0bafd607e5ed7b134fed76c80b868c6b431be071e74be3ebb. 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/SE6QE2471337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933e5e556ba2cb6796b78dcb7d26d79617faacd2c1ee44f1fa35e01d1354cdfd. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/SE5BU2592997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9200a9d9f23ef2bf4d061d5d111ea5d61e2abb38fb69fcfd714fe5f32178a2a3. 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/SE6XY2586515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bbdf6543f8f08859111b069bbfe17f737ba8b686cfd19b15fce374dce723bd. 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/SE6XW2512064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5467e6897ca8e3d9f995169f6c562934e0c7199de55664f8f59b55e7164953c7. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/SE6SA2541484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0721c0c5b7aad091a0d69d50c8dbfb0b245bdc8588e66fc5f324efcdc5cd239c. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/SE6I32541790.