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 0x8f6306c255ea7f14758bf6b9f1a3ff35922e3ef09cb56874fe79f543a00caa32. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37e30b35-0e25-43dd-9cd2-47819f6e4b82.json and https://artists.proofprofile.net/proofs/artist/37e30b35-0e25-43dd-9cd2-47819f6e4b82.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 0x16075867fc659217fd48b7287d8841c507b3bc72e955d590c598f8560db2a6ae. 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/QZS632376454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37abcc0cad96577be82aef80f29936028f6ae59ce583f6a745ab2ea800f31607. 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/QZS652364717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a39322e6bc7373b08ea7c22a99079677f5230f56865ff6920551805e1c30e34. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QM42K2392019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124bb53ded142b323e19b89fb6fe1865b7ab307d05656c58100d9f4c471e3e33. 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/QZKDK2212594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c2f5e44ba096d85f43cbc2362c426ccd4902213abedd4ecd077736c71f7fc0. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZKDK2241370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf2ecc222540e998d479ac5f077f45f6b99fa1f4f2ebd8cfbcf201739c8465f. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QM42K2459507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddfd59866d9a1131775e5638b507cbb30cc65fa6feaf833f508942a449916a4. 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/QZS662429647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b384c337c52a86fb3bf86cd66dc7280159bcbfdebdd6c95f77af03b9cd9440. 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/QZS642457292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3fd7d5b79e773eb4f45fd4e4d06f1fe1db525177c2cc535c181b1dc5694062. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/QZS652416654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd060d3e185f9145b180f46f827e176bc0f990d8aa36ca8c130349ed0b3840f61. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZMHN2402430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd960c73b6042bf70894ab4be123bd8c9f940dc4ed65399321f675e94802be5ca. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZS662405325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d61836ef07e9d4c0efd29ef69efd6a71fd9d71c82067b2783974ce03c1a465f. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZMHN2419047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce4f4a940372e15435d84f1183e95453554a5a77b07f2c149212379733f9827. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QZS672413487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0de574ea54f1c983a787e02f032b9002e8e2f3b5fa14afe0476d96ea0870f1f. 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/QZMHN2466964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdc761d524f8a9eea1b8f026e8711f3301a0a48d48b0e017de78da38bc1c93c. 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/QZMHP2593878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc3582b801ed6e5d6d1f84a0d4c59ea402e20ff6049c9a6e90d1eeb882fe7ad. 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/QZZ7V2425598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773df6f7ef513152281f837576f889319337d31fd102b5dd1f31709f9f1f7a3c. 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/QM42K2563186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472805fa5625abfdd392766f008ad560c9d9060be89bc7909f0396bc1fcaac9b. 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/QT3F22457591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebee1d9b673de791c14efff4bd2b35a2a5263ad696e3b04fe9556518d48f97dc. 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/QZS642592425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5cfde414a8d0eecce724bed737d51e84e4d5544cdf155a644ba715fd79a918. 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/QZES92559558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece6e59a06d51e061808393bc22904ac94cabacf1a1a0045a051b7c7f03c3b91. 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/QM42K2546038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bd1fb487f78d376334dcadae830b74a90d4a2c6c21365d035a4d78378ea3ee. 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/QZHN62572034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fc311317f95e72a4cb04608dc627532c3d361dde6420dfe2757b1a788f61a5. 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/QZK6P2574926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa513761e4efa202db3f9439c48c0d6832f41773a5091b702b43845909b0fa36a. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZMEP2543815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1221207754ede2c6fa2321953696fcd06348c007166a132d9cfa0b44c2c44131. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZNWS2558602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9941fc64a041c3df1a35dd12d92dd2e5102aa02f84aaf0b39089c7583ff7b0. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZNWZ2511221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3291e366ad9f50470eb592d55467a7948b91d4f0f9ff6f2e5d89e55e7399b42f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTAU2586377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb68b7f1f187f581072105430664e037e0e42e3658a4a25b4f7af3b07bd1f4a. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTBB2598043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a016193ce2737e2c106515531e5ca7d48af4af878d4ecc0d9516d7917fe2f0. 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/QZNWZ2337064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccd232d5df07412af96c12ff2f76ef0dfe036da3eb4d9a4f3ceba1430a4397d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZPLS2171864.