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 0xce2b1dcb45bf94601e5b9797b7e70a64d1d69b0ae1bd3df4e58a3bfcc4a3dbba. 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/3accd79b-c10c-46fb-befa-5423253cf18d.json and https://artists.proofprofile.net/proofs/artist/3accd79b-c10c-46fb-befa-5423253cf18d.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 0xc50ed1f74e663d049505e3ae68dd829d92e188936863dd03d7576965122367b2. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:37:56Z), 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/QZNWZ2189584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ccf1c514889c60430b4d49ae8fad15e0ddd69560706bfaedb85b05fe94cc80. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T22:58:12Z), 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/QZDA42257578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a8e1c7567141143ddb6e61a14d7335e5cccaf521abbf07661fc559c8ea08bc. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZS632312140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe986eb6396bb441716ca6a94ce8acdb57b673dee1410993fee6a7f2a1f6b922f. 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/QZMER2330152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f19c13cc0bd0a13947fec53f2ad4889646658a34eaf1e3160e8626f0066b199. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:20:07Z), 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/QZNWZ2330440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7485a412c7db911d9d3e0a985d30705d78545e2f3154db57af28eea9075fca65. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZES92456831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118650be8133f36ca8f999aba67b34c83c2f0e2c6df32171b2c9dd7ac8a1ff50. 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/QZES92457052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79245265e308f5a43dbf689968a1b3fcbb24c767358f6edb84951440d05e5b4f. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:10:50Z), 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/QZES92457106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc699346b08186d6e7d09f946338fd51c5b793c5cd51c8e4ea531cdc4cbbb56e7. 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/QZHN42427853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710db2b33fa04bcfc4e429e33c54a876e658e4c94f5bd8a6e4dc04b1bac15d17. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWX2473687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ae9aca49a22074505ecd51bb0dbc68aa920617ab8f09bc90f57ad3572fe9a7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEA622401490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d846176135f145b78b6f8225dc28ccf643c6a8b8c97b9ead65b9b7c1c3e12d9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFP2467360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6c33ec3622e5044264a7ccd66715d9655a079a07bb6919f9cf48fdbc26b801. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEZC62410236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35651e50c6be7894e9b98797e05e7e7a3b651171ad4706f7f50294bee16a0909. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZS642341915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1508cc183afb92844e35cb43747bdf6488ed9df028bb6e638f75612984ff0bef. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DECY52301576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e30f380ed48ccf758517df842fcd59309d0caf99eb66f145afb5250b33ab9fd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEUM72401087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e30f380ed48ccf758517df842fcd59309d0caf99eb66f145afb5250b33ab9fd. 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/DEUM72401087.