Washer most commonly refers to: Washer (hardware), a thin usually disc-shaped plate with a hole in the middle typically used with a bolt or nut Washing machine, for cleaning clothes Washer may als
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 0x9481412cb4a2c04096ea56f3b877a5b37276d868dbf3679c2293a08ae1447332. 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/6d0c7c53-ec7a-4e44-a224-32c130886520.json and https://artists.proofprofile.net/proofs/artist/6d0c7c53-ec7a-4e44-a224-32c130886520.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 0xbd3be65f4a2ea170aca506f2ab08403360a78c61e72342ef6d22131619b7f067. 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/QMCE71300703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef59a2e2e0c3b70ad3df15f3379e370c817af7abbdeb28555a10003b29522abb. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QMCE71300705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3c029cb69414740dd0e0abba59ff88f366706be44ec5a571f9a3fafcaad7fb. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QMCE71300706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe819fbf908d9828a136d366a18e59bb4633c5f40ae5afd6d410100ef51f24b91. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QMCE71300707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76bb5fe507206de7870b207b5f3fbf1efd423d3e152766810e19361e77f67e6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMCE71300708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8dfa326afd8970df4bbb6f23f644609fb2d98dc41a283d06dc3241effd09bbc. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QMCE71300709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1e409979463e5b7755acd01dcd9e971fb93961349773ab9b7ae46850acf4a7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QMCE71300711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1263ca1f5b8e3ce3fd71485704b91bb00b76996ad96a49adc40e8711d49ae15b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QMCE71300712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e8ac640aff2ead41f715e7c9cda0ad9b7862342914b4e9d80e0b618b2c6d9b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QMCE71300714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce9463286ef82ee0118d3e20b9d6a0145f32c4f8fc2c3e71d8c3bf4a35e4dba. 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/QMCE71300715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b95c6a724b079ea4c6e99c85f7be994de4787ccb25cb421b90f4408962344e. 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/QMCE71301540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7213b2135daa8c9c4ac9292e4d2b989954df9b411b63c229a17c1d3eed10d4. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QMCE71301542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2dc0ddb272567668992f75bc434840f87cbe73980fea9aad1710d78a274760. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QMCE71301546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbc7499fd128cdd79d71989b40d708348fdfe18fd6c151a0b24d37aaa4bd569. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/QMCE71301549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd3a4b0206eada9bdabc82d17286b36f24d0b074b2577a2ca32bb3702217d31. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMCE71301550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c373960a7f8a107b408bcc3d20ae19096cd9eb50776a5ec28fe40e0b5c3ed9. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QMCE71301551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c781e40888fdfbc93d1a4d5fe96afcbeda72561f03c78f595672f0abc1b4614. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QMCE71301552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e995e80f8fc019248d5c779f5f98b3331c75b9526638fc1714c81fb54002a07. 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/QMCE71301554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c80697d3833114bb9b210bdde30ed748eb6b450dc3824eedd863c39ccc12a87. Chain 2 (Bitcoin): anchored in block 957629 (2026-07-11T23:44:46Z), 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/USA2B2305457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae978f6b6fceed2fb09c0db8991850e6aef17a569615b3583461fa847a08d9b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USA2B2305459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e086c1a0e6057dc0aea647f457a8985a49ef4a1a423130825ebd43437bd25b6. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USA2B2305462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e8290819ff666231a1b69d01891b50d7a8657cafce7b21b5e958cd99b327db. 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/USA2B2305471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b900badb121c259bfea0ed49c04a76716ebd5bf634564ec9e2562d2fe35035. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2B2305477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a41c628eade3e28843c246c11d5c2aa2b66a794af70b22c7145f4a10af4a4d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/USA2B2305484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa1c81acff13ce01e97415d299f3af7e05e5343d84b6df8afd2eb6aca850dfa. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USA2B2305492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510f27327c62a69a53c854c96bcbf7d47de36028db2bb13b800dda0c95bbe546. 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/USA2B2305547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627f51b4671734ac0660e0a383a30e845bcc24d7c2be222a8f7ce18438f76d0f. 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/USA2B2305576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911d121b61bb0b076ad99b62ca4f6fb5507f7d901747cccc7588478f99ec1c65. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USA2B2400860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5b931e0cd9deba21e9b666f6c765472a209305096d9e752655a7b145c16fc3. 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/USA2B2400872.