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 0x0564d5d3539efab70b05bda5ca94e10559949b00231cefc6e0f78892395d5b09. 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/8c34aa76-43d0-4175-8722-3570da47691c.json and https://artists.proofprofile.net/proofs/artist/8c34aa76-43d0-4175-8722-3570da47691c.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 0x0b837dcf2ec3aed92436418fed2585efbb8ea44c88ddca3ea84659905683e872. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/USCGH1425078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62852c482011f5c5c776c97938c1ad5418d7948440fb6641a293db8a3fd41e24. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/USCGH1425080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e2ea82d65f0285b3e92a03902d19d1d597cec07d7ec867834d6ca54c73b2a7. 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/USCGH1425082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5448416d3423403872fd59304461c405632fdbc5b4cd050014f4d7ebe88086ac. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USHM21208526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce18d06744cd9c191d6ed3ae554d47a6aa5ada2f11dd78016b56fb123ce0651b. 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/USHM21208530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f903fa113f01c3aaa59c7b6e01dfc5e1bff0ca11c66ea965ad8d6fc4e891318. 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/USHM91282201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1b9f56d631e72661c69f3912891caceb4bf4b1051b80ce3358dfde88059983. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USHM91282207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0825ad26e3096d1db03db4b3afdea135150a3bdd1fbdd3ece2640682a9629138. 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/USHM91282208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9199f435b0210419993e2907ff625567ab12cdbc89af817206fa422403469fb. 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/USHM81135774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf692cca241291f234baef6d5dbd71cf4ba9df573fe1a2486a34ca5c97a2bd4b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USHM81135776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1d06ab3e2145a9183c16f3b077ea55e9969e00cf8c6e2ee9bbf37cc60a74db. 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/USHM81135778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95d118f14de9356c80cf582270e8aadba80d479e385e7fc50ea32ccd43d130c. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USHM81135779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94448912caaacbee03a5888d3aee93588c9b85a6dbe231cd2981afa722fc5c45. 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/USCGH1425068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6febe2f7c374090948cc3853c735dfb7778f14c06b750f7988972076278b6d78. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCGJ1296319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc62fac0a94f970a56ea5b28d5741e01b406e0907e1e73a6c7f3f0cc017e34f. 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/USCGJ1296320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2f33d54ca289cd75cc126d35ec4f86dcabebe4ba1490abc49941c68e4ed259. 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/USCGJ1296322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7cf1e02e4d2d3d88ca06236a3c03d111f8f9f34b8900058682b50dc628cbef. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USCGJ1296323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fea028e8dad23629938fbe13d41f3561302512cd3f86861927a67ad277a599. 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/USCGJ1296324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7354e54a453ef181bd33f3d6c76728008dd835572509789f00c2c97e779b66b4. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USCGJ1296326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdedbbadf885fc0d2109922b0cda318329e042a7779277085635b8a4c2cdd6f. 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/USCGJ1296328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf12ee039f30200168a38948f24f686b77c02496958cd773b1b00f9e6d7be83. 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/USHM21431121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69eb2d37d4d616ac6faf69d63a6e049244f09c039edbbf78ac681d90e1d808b8. 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/USHM21431123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75c20fe6b2f55ab99d41928715c5c451f9035cdf987d05e1f74e644fb475c3f. 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/USHM21431126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5feb9fcb12759b0492579a0798b74af7f2ac5640b314f1589bf7148938cd05. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/USHM21431127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ffc9179142bf610c482a31076314fd27e37d16cf261e661d8d4619b08d7fae. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/USHM21431129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c106321a26eee83c06dfe34fbc4a03d9182e1b118eee1cedb24134166e04a11. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USCGH1814864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80f756492f437c81fd576986aef89dbb4f15a959d81b4127a213e8724ff9960. 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/USCGH1814865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04f60ea8f16157969e69aa81957b97717985a70a4f239020710e5648157a6d7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USDY42010652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda32515beb787dfc1e2d585b08f980ab23172d4b683ff4ba9e49f78762817a0. 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/USDY42010653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08dadaa4b58d5f7fa8e4a7561894124e0d33ad668fb97fbb85bb552810ea6e3d. 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/USL4R2084240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9620063865099863f26b705b68328566fa4bce6bcc37d9794da65fd169e9314. 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/USL4R2084248.