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 0x62bd7eae00b23d0a7b1d8c3cad850e1636b390fc1a06dd79231dff6bef17083c. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3a921ae-dc29-45f2-8922-c95ef0b7e97f.json and https://artists.proofprofile.net/proofs/artist/e3a921ae-dc29-45f2-8922-c95ef0b7e97f.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 0xa944af69760fd71366795a87bfcdaa8c31a96a4c6e33bd4fa3df1dabf3085d61. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZ7VB1800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b8d55fb4605c500e6b7958c3883fd3b6d512d32272948604d07236f054fbf9. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZ7VB2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a7e56db2085adbbaec4f43639ecfa337e14bc3a860cc07b5370fca82bc3a18. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZ7VB2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb418c463d165b6fb0e144eba876fe212b110c0ca8943b444d032bb2a43d0ac44. 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/QZ7VB2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0dd508a7f82997afa7970cc5e447c38d794fc8abd1b2be5c78232524fcfa9b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZ7VB2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ffa888f52fd7745c192a7374ec439a4862735fdda164b685d8eabf44ad9072. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZ7VB2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1efe03f610d74579e1871ae5cbfa8a8c3635ea113eff9ef7e971a09487c0a7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZ7VB2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887998f1805a63025a21d78f74ec037a0716c3a83e066f3f32e3ad6838e63f7e. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:09:40Z), 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/QZ7VB2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ab43b7fb88145acc6bbc06db36abc8e89a24e90b175a90bb52e5a254254fec. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZGYN2401302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5af10ebb55ff3ff727b2787998898016ab4028ac1d52eaecd6b357cbde09f9. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZGYN2401303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b99b1ec7cf56d95279aa941e331805393d9b10a0e6608ce43428e762a3d3747. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:39:06Z), 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/QZGYN2401304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe025ab5d0c195f9c2a9e5eb3eb95e513c180021474c51df891e0b12099d448b7. 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/QZGYN2401305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b66fcd96a752dc6a3e2380d2ce4f233a9364678a0abcaa9d06963e1b318078. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZGYN2401306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48abfe0a71699a54706b272e490fe49cad0fa188e171907f03842cdab214f315. 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/QZGYN2401307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a48012e88b6b9a96242e8ffe2d3267ee487cc85c915dc9bb4cb6852cfc6595. 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/QZGYN2401308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbd6854e344c4ebfa006b0a5ceef31f29840e8134e227eb160e87dedccb3b00. 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/QZ7VB2400019.