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 0x6a274ef4f10ef3ab63cb2c55e7f8f31cd3c28f8e92a16e2815515b8faf04d37e. 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/1ea8e211-9e0c-42a6-bd98-96547421536a.json and https://artists.proofprofile.net/proofs/artist/1ea8e211-9e0c-42a6-bd98-96547421536a.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 0x032cf806ac03ffcadb892e9f3a42c6fffc50bb0af4f3ed639022e67e4fd94325. 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/US2T60910076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95efd995a2b8bdb1cb2f2327b8387c7bea4eaca2ddf4f191d61fb1a5480dc5a. 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/US2T60910077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ff9f082f711c3fd02d5506c9be18bd31ef523bb851db6a9b964919a68b6ef8. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/US2T60910080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4318c0b6811aa55827bfc7cc8e3c72c0a64daf4a00e38a369e25780c1c12b7c9. 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/US2T60910081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6014e3c08e58f13e4024c374120ec35ceafa94c59ce85699fae22fb041938568. 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/US2T60910085.
A que te sabe el amor sin mi (Versión Editada)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d57ea8f4f550bffbae1c92aec685e724ea15e56fab05cb7853a32da06706657. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/MX2972001897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5c09d39d65452227629e58874dade5290a8a8947ab839068c1aa7f28e8965e. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/MX2972001899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1e454fea4054198de21c9c89f3f80a14ab8450e6f0ace448843a322e78567a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/MX2972001901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7b6c25c38d5d3675a2b9e9a5a76a36c887ca23072f8f0ef5a417d230924576. 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/MX2972001904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea665d4504838f4e9f956367882e79d69d4bad4a4d2572415ceffd02c9da8474. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/MX2972001905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fc50f55336c7d022579c148afd47c2d5681a12b60ca0424921080beb206408. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/MX2972001908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ad9ed0cd15f40bbfb8428c606bed85bcdff65f3a63fdc431a5104c021b01c6. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USASN1001884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96ed24d40b70bbd863f1c0ae3aaf3b9373ebaa299102c38396b90275cead651. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/USASN1001886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a9ad9c86caeafd27ab7761407b6a519e00494c84e7e0155d442c6dbafe4f92. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USASN1001890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c20e5125277bb9407e7decdf99309e5c2e054aacc6b15a3cbbdd57a657d8846. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/USASN1001893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6356f23415fafa63beab6fb00f5ebd52b29d84b928713864642fb4cd4df1b8f. 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/MX2971100198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ee0eccf2adbe815486c74517fdfdb190f50cc642248918fb5814cdf4b609a3. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/MX2971100200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4090a118fc4ad4bd39a983714072d9c3e1e00c28dc6905d1ebf9ed44abc5464e. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/MX2971100202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fa48889d2ed6a64a570706ffb54473632ec2b067e5b76ed1725beb68d1eb50. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/MX2971100203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0d1722566c28d796b1bb891a299d95f20ccdf44bf071bf8793ee03baf894a0. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/MX2971100208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba58be782b2b8259e0f073c9fa1c5e2cc6a5fa74707c33d82f42d1392260638. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/MX2971200442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3268443a070fa2272570c6d270c5bfc735353e9da98ad8f0af07d1b56f7d5a95. 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/MX2971200446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe1f3fb25b2afefd65cd0b3a7f1e37c30f9a1fa90e2c747ab15a85ce8a89d5b. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/MX2971200449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe17226f16e7e5107220bc855138e187ce18b36295e0ebd28934774c27547517. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/MX2971200450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be67202484c646e976aaed72605feac9213d0a8c6ea6c8968e4bd0aec4b153a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/MX2971200451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6191c12222fa206e4c115e99312b9590e705c26a6e4f34679f54eb4e26c2874b. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/QMEU31510191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afaf83fdc531e02c6e3e08f2262cff85cf577ce5baf97665c0e29e1789ccf19. 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/QMEU31510193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08033f4239c4958e75448637d0929b56e3e4c03c5535d30c9089d0ab31e2a3f4. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QMEU31510195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a808831d0ca7ff3bcc2a7a024b0047ae1fda3316bb7401a4eaf9139c843871. 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/QMEU31510198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02290ddf785877888fcf367a0b4b309a1e58c9cc410d6f0234462825137570f5. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/TCADF1784711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1832c43a890925d1995e4ccdce65398628b2a4c87615429bff6c9158cb3d2c. 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/TCADF1784717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4af7e2c9c7b0f54e01fafcf837e5c04dcb7cc182987a6ff90fbb586d1f9c85. 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/TCADF1784721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692b30311f0946e153a56a11c9db54fd404590b0b1759e04164d37649caea2fe. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCADF1784722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c6cba592f791098c496fc9a6ecba137f836f3e14e48bf5adf477ad9351504d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCADF1784728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1664ff749c7a0e7261adeebfebb392baf1cf46c306f252694ef5f492447359b. 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/TCADY1831284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6653c7196767fcc742aef434abc925e6f3a011f3ee3bfc12b84067196fbb98b6. 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/TCADY1831289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f555f9e8a16878a86e691592a94d7770431b4effc7fbe9b738fabef49721c66. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCADY1831290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3766d4aedefac70fad19a746824c7476e4d3cf3bd7c0b1b375e631449b5fca28. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCADY1831298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c380f063f2257d07403e09892be5f8621f09ba221d0469a5270c95ffe2fb0b. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCADY1831299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69f5430e1e2d47702bbd25ad6f81dacd7d5b53835e2b5c5379363c2a19d82a6. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCADY1831302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7feabe5fa956e7cfd2851c29021b882dd93d3d21e48eff420fc8e923817b8f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCADY1831310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea6cbcf93824a8f34ef709ae04568071bad02e7a8e1849c344ba0defb3a686d. 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/QZHZ51938092.