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 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 0xf3f9792be88f5c43abc9ef9fe4d27adf5d642eb793103b3bcf5c1ecfec1b8df0. 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/36665a9a-9641-43b5-9cfc-f41d18078420.json and https://artists.proofprofile.net/proofs/artist/36665a9a-9641-43b5-9cfc-f41d18078420.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 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 0xde28cc702695c6cb9ae8df789baf445bc4d6bfd316893607a2fc71a965afaa3a. 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/GXD7V2240944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd40f687d940af7eb870f7c341513e588365e74da8627960a711b433c83e0957. 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/GXD7V2246663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02193033802f630cf4933de5be26b9b6609e6291cc862bbf5eca0ae3388d9e8. 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/GXD7V2284392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d3cccfb1af8535f4d3bbabcb4e93177d4d19f26fd9bce06da5dfe8490ee913. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GXD7V2266653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4298361d41129e934e95042d78875fca77cb3e0706eb88f95dda03bfb424923. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GXD7V2412997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a0e3249b7717095c53785c3f8322c2a389cb6bd0edade52a483b2773b825de. 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/AEA3A2415074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337c30b263099a06c074fea6458849eff352ac560c198f3dfc51126ad0153ee2. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/AEA3A2354572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbecaf778647c2c0878e604a4f99f65c6c399ed48ce773eba9324b4648c450a38. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/AEA3A2392907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9310beb50e69a22d20bbd23fd55d7ab35519ab59c2b82c9a8f5db9e40c558bca. 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/AEA3A2219984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725cf5fda4a25c593ce6b4bd054d1aab50d962e9450e081bb392e1c4a7e1360d. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GXD7G2260985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e75026eb2e1296162c256df0182aa5fc90c8b73446623029b2abc0bb51c7934. 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/AEA3A2295362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7159cf85b6acab6411370f617b49e4cabb90dcb8f13d77a14480b9321eaef8. 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/AEA3A2183804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576ab6a51fde6671ed54c3817d8718f8e0e07b4c334be52e25aba277d8f16c41. 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/GXBAV2116212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbfbb8e66ca3901e17ae3c2c3b8e1b62ac0209b7cbd806ca420a0d6a9453612. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GXBAV2132128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbceae0ba62dac94109bd114b8f2fe03d51274a2fee5f0bb78e18b75d13d8b65. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/GXBAV2021971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4322dc1118a28284e9ba21680a3d89047665a24e6c6c74a2bb7030976dd5bea6. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GXBAV2079499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe406e0d23b5068d756ec0d58e1a3ed97b9cbabbd55d8f4c202078f0f196ac59a. 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/QT5M42581722.