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 0x7f32699f42ff00a82cc11f3e9bc88e141624c5ba427c99ea31b6cce0988202f5. 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/68e6e768-fb5f-4e9c-a0d4-610200284872.json and https://artists.proofprofile.net/proofs/artist/68e6e768-fb5f-4e9c-a0d4-610200284872.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 0x5bfa7ca16ef49308b546c33fd4ab6236302e7646f956a2905b7fefa59f192054. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/USTC30773760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6dc48d9d3313e40931e63f51b9c5bf5a9200e6566fd9874b34fb74311e1f507. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USTC30773761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb2c5992aca570cf764f80762e92406e10306a3219deacfa1d13f816ca90b0f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:35:13Z), 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/USTC30773762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f64ec99197e85027f8d241787f26a91c090061537d3b505c9a368a82a22bf94. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:27:35Z), 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/USTC30773768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ccbce368ffacb105dc5f675eb688ed68128613d27484e2c36a5e052b3558b7. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/TCABA1195159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a57257ef0476838a647ef32a8b60c9eba00541d2f1929c372ceae5b5650a75. 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/TCABF1240057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c46a0e7a35db5ec9b3807f312359a41e1414a23ba816f4c76a5b52c6dd07e09. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCABF1240059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d7f0246802bdb0450d4a9009eb714c8bc39d174f2ab7185a94441ad4371bd6. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/TCABF1240061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98be10688d21064a2ef704940b6a8af8688b43e9d4bd0e9b199eb33203937b9. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/TCABF1240062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183d068c989b850ad30b2f1a91ce2414f4e30528c2de96a6d147c3581e84214e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCABF1240064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a78a7c33835ea1fd7a1bffab7d58b0cf6e863088b94f3584894826cb76efbb. 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/TCABF1240065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d197e035ca4ad55993abe83b8a1d9ad5ad301b3b690d1271f182b758a0ab39. 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/TCABP1386951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8548596353715779f0f2564b01eb88524ffa6694758b147461a8f3f20fd6c324. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:51:36Z), 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/TCABQ1365045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2726110ea07c500aa97c29dabce16d45797fe2357fc165354439c11e26d8f38. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:54:15Z), 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/TCABQ1365046.
Twenty-Eight Days in Two-Thousand Nineteen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0a7a8eba6941873ebd397b15c5a7ad04ecc52b6096c4052ce6943ffa39c161. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZFYZ1926075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1a184f06125b3f6b75984a9ba8cd8d1889c99c932a2cf347dd05ac4ee24531. 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/QZFYZ1926077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db48e63dc2d77354e02c532f30d07ed39e5fec86dedd39d5a2f8f7fa405d6a1. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZFYZ1926078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da856a91a051a68f4f93b334c8d41028829d1231ca15f6620b48f63f30103b6. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:00:47Z), 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/QZNWZ2222773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e36c375bb6c2c2127849bf80f52aa1ce773aaca39badab986c7f76081ccd44d. 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/QZNWZ2222774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b9d4300c87696f1df9227e4280dc933cb80820e4020ba331ad194d7bec726a. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZNWZ2222775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c14f5a918a180be64ce3e0bcc463aeb59580c4dfc5f709c8bd6a78614bc53f. 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/QZNWZ2222776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf93d062e398d818607ae4e8eb06b82483c183c89445fc1cbba1a857957e9d0d. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZNWZ2222777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815fe352c58a235927006c6fab37ddd3ef798c1c33429b8397ab01627906489c. 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/QZNWZ2222778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b763c562c8c1b80729a926bbc48b5573dd02bee48b42650d2426ef61fd2d818. 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/QZNWZ2222779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905b52a9cb24fd3d6fe21dfd61c0db6a2219c6a68e8993c4d07eb28f6f555374. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZNWZ2222780.