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 0x880268ccf595a096a766a2efd7391402b85a0d3d58afd8d7d8d6e472eb60dad6. 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/fdad159d-9dea-4b67-a157-f70a4f46f90a.json and https://artists.proofprofile.net/proofs/artist/fdad159d-9dea-4b67-a157-f70a4f46f90a.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 0x277132c5c9d185a39321a25cdfa7422e64241140256ef1e3f5d073ea6d6f5950. 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/CH6542051161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c1f3b4635b6555bd95a4d30f6ee4501566e459f7b3afc6c8dd9ad2d26be5dc. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/CH6542051156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859eb3a14e5a956270d487131476873aa3ea2bf3ded1de4894b7b1499274849f. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/CH6542051155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b7884b749bb86c126529436a37c83d542597c292fccbf4e6276206bf19f22e. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/CH6542133939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743e44637aa54f1d7b0f7a0ad43e1b93e839b3f83d1f1ede0f8eee0f4965f4c8. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/CH6542133940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf2da81788463a912712e857234debddf909d9ff18339e478bbc91f874aaaa1. 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/CH6542133942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1eea15154eb9e06eb8c9d1404122989582ab0e865e66d3107632a06818ce2d. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/CH6542133943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf64c4be02c3559b766f66f4216a6a04ab3b1e75daf02b10af60a8d2503ecb6. 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/CH6542133945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93e9e2632586aa3e5496fb62a778f7e0779ae5805c7bd201122f7f51c97c35a. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/USHM92100213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25e24fc544e0e2df9df50f52e8e240de289c8785524a20290965d0350472622. 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/CH6541689435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808545b7ae8b61194ffb4ee3192eaca5e9dfc0d8959daa93ff854296a571a48c. 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/CH6541689439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5af87c1253dd716b369141662e059b59a81ae4501437fe833876e3100ce791. 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/CH6541689440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c92e7afd81d1f8663c489525ce103224e6abacdfe091be980b8ff750e88257. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/CH6542277773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33a885ad9a1fbd0b136292f8e542034ee5ff93000637e3373a7fcd83f0906d2. 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/CH6542277776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88253444044315992bb37b3e86783b069303b3995301da52a578100728c119a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CH6542277777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b39f77987649c5d4c1814f96d57cb0b35c41fa44a778f9c9fcdd83d7ee015a6. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/CH6542277779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70fc0c225d34caad501d2d17ff097350b7b6d7b30b6cef0d4334610a310d583. 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/QZES92330563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb549113098498a329cb575503fc926af0db7d18fab9226a15c516a98c7b607e. 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/QZWFH2321682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb88096548e32da897a9d373d55e397f820898ed751e8730f65a8ae176f40b4. 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/QZWFH2321685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01aaf5fb26fc823dce879ee567116f8c1efebb58d19528be03d26adddb1c23bf. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZWFH2321686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdbbd21c59447eba16c9fc134a9aba11a0e5deecfff1e2b54d188693a44ae59. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/QZWFH2321687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7195b9233fe492ac46fbe8e58bd457b7a421f5f8bebb4e271c163c435c9eaef5. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZWFH2321688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bff4a82799bc173c198b20077f481a287d2bfddbf6572464361ce44c1ae513. 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/QZMER2400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ed9109896c962974afc08e58e0883836728379a3e4a6fa1920e8317654104b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZWFE2427987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad41b6cf0fd9990beb776e273e217701d500881d0157f41cdfba022ec63867e. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/QZWFE2427988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd99c61d1a11f9676f91e4605b4b043b9091054b1858c084ce56b064009d89e. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZWFE2427990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7638b97180a6ca82f2c033e2902219a97bd0ea4a762f53c84015c0120e8f28e2. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZZ782499215.