41 may refer to: 41 (number), the natural number following 40 and preceding 42 One of the years: 41 BC AD 41 1941 2041 Arts and entertainment 41 (film), a 2007 documentary on Nicholas O'Nei
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 0x37ef252bc9efc02d8a82a14fe83a5392d303a4eebadc720a64306f0244b8a1cf. 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/0599912a-8a35-413a-9d02-20eefebe05e0.json and https://artists.proofprofile.net/proofs/artist/0599912a-8a35-413a-9d02-20eefebe05e0.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 0xb0760638745b83c8ee21f8238475952295eef8e9d3c4a91388801a313b7b6347. 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/USUG12306666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9de52fdbc870cffb6ed5176b24de07940148f7b477db0a17790125324160e21. 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/USSM12308655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a1f6ee0be8e16dca3da78f50d05943e3ef29024cc1cad62740c3ca629b593b. 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/QZTLA2423172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a1f6ee0be8e16dca3da78f50d05943e3ef29024cc1cad62740c3ca629b593b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTLA2423172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd9d4ebf82533dd8329999253b2f0f6e5ea242cef2e1c0641d6a4bc53f0b44d. 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/QZQAY2431256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c0ac6cc7ca8f6aac7d4bf9fc7a972fafcdd939db4d213514afdc5f9e771273. 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/USA2P2451257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d56b6b90cbcc03d5076a131ac8ec5167c6d5a5a5407033603f5360783d9a74a. 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/USA2P2442379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cd965833b64ae642b3e52b118f10f6f0884a7f7e39d706c5247b6fac35874b. 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/USA2P2451255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b314b962bfb00ea52506ad5e337b838d5c571238e5b7d3eb2e44cef35c0068e. 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/USA2P2451256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62aa7daff90dd36ea7aa7cfaa34d97bfa2b0acb0d0f5c3503bac0b4d76a955eb. 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/USA2P2445495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af37f2b574710ced352e65632b836d7e6547d1feaafd67ea0a13903ab7a91c6. 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/USA2P2444547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d56b6b90cbcc03d5076a131ac8ec5167c6d5a5a5407033603f5360783d9a74a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2442379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d56b6b90cbcc03d5076a131ac8ec5167c6d5a5a5407033603f5360783d9a74a. 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/USA2P2442379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b6a495ccf08e40a02d56597b23612a1581da0a53e17d6119926e14f70e7ccd8. 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/USA2P2429966.