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 0xc789a26ffde634e924aac85c956be1ef85912aaf35d2cb84edbb77e43f52e63c. 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/d311e9d4-7ff5-4734-aee0-fdb4d9b81629.json and https://artists.proofprofile.net/proofs/artist/d311e9d4-7ff5-4734-aee0-fdb4d9b81629.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 0xa34b199ee62b5769799dfe1408551cbf4cc06f62bdcb8f9a1df54bb0140bc2af. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAGG2254482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9508c7c8e79e4fa3eaf2fb6ad2dab9a74e17381543b23d7434e5bb94bbc54e. 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/TCAEX2016937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x640a430d4f6f992a93a03c1e998389aa72001e3d9c1bfbce45e208fc2e4969a9. 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/TCAEX2016895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b0b1ce2fa932406b032b34e2da0dc544e3662479ff0fb08e7408b47adc8df0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEX2016999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c798cd1c0e29c3c95d927e79dac4126f52acd45feaf7c39e03ff48efd748064. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEH1989095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219e1a0125c4b7517d5ab94c2c2808fe996320412abc87805981a81f76877de1. 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/TCACQ1637181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5320e1b3846eb35e6adad29f8247092bba14ecd21e1c69cbf984ae52306d6b. 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/TCACQ1637184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33f5cf5b3f3fb400e2927f3c58db2c7b38ca976574f29a04188ad743e573479. 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/TCACQ1637185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e515227da1385550d45782eca4bd7381ea7e99c67e6b576c9ab3920f2cd0247. 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/TCACQ1637189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7185724e2caeb315d519a6ec1074b9b9b53dc0bdddcb9ddea0ce78bc34c4d442. 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/TCACQ1637224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348edf296a85a968276df5fb3ee4c5097d20121db2fe37ea2c1c2feb0b1a9c2a. 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/TCACQ1637227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeca959315e128375420bb8bd5e3182ffe6b8419db9a55574ab1014d227939d7. 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/TCACQ1637247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246e0e1d33728141449315dc78cd18e7f35d3fb4eeb852aaeee39f260deea59d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCACQ1637284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47866f7f7cf172ee39877ca13c248cc9c07dc3dda278c40507302004f7e3d5e. 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/TCACQ1637311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69bfff94442de1346791c02427582e70b5d7c271010f11026a7107269369028. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TCACQ1637342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72bc21d55889261a5f9c0c82cf3493a2f51443db2d065d985663a9c9c239f6a. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:41:35Z), 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/TCACQ1637344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45294d10364c21d3a599ac7a6738fe87ba688f2c48618789d182d647e01e858. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA2P1566809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa584b652db2c7482056b95f978d8855a94558d8a9a35e72f67f4eb9ddac413d9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA2P1566810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8147a1ab3d0b3f2a2a78aea096d1e2a9ea580f64722b7230fdd76649cf6fbb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA2P1566811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6b7a3bd281c39199c7096707d994291ef82c0c53ccbb15b53af6da968ba89a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA2P1566812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd9bf4eb693676ee317d0a676e82bebdb31fcd38802c47ae0d90dc4ab4afa24. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USA2P1566816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a38a0307d117283387d9bf1b8a27b60d4822a5604cf9f60f9edefee60e752a4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAHH2353569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc8a1ff0171773c5a5049fafd92d8846a56701ed7f90ded0144ca02019acd39. 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/TCAFR2156832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8565c6e06524c285de86a54776307264e7e0576856a11e540d11747b4dfba275. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEN1995392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac63530dafb72ed8a6c549fef32bb585159676500aa0dd8e7c66ffa6fed7355. 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/TCAED1905933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e571e67789bf1ca95af4841e8f76b9bd4391a7281993126c5e9792b1a016a7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZ8251812912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157b13b7d00fb5b3161484cbe96dece653390c75d147deaadae5ba0f1ff6df07. 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/QZ8251717304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef6167d18c44d677f89702253425488148ff58e5de67036ee799dac64063993. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/TCABE1210102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86473537458c69b691a1dcd98fdca1827fd3d829c260a53ca9c24255cb08a1cc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCABE1210103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b5535d3f8e685d08a1bccf6f03c7acbf415ec1b414755daabf5a5649766247. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:03:10Z), 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/TCABE1210105.