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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af1431ce378f75f8e3b17ab356d5360e51948b5700ec98e7b8c9e3c67589d01. 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/9a6198bf-9e83-4121-9576-4099154e12c8.json and https://artists.proofprofile.net/proofs/artist/9a6198bf-9e83-4121-9576-4099154e12c8.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca19366677a9dda1369b4dfa2eb44a9ae899eddf255581086822da0b9ed118a0. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCACG1501739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cc217342f903d444f182664a81fc86e45b798e303f01a8d1d221dadb0b4a70. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCACG1501741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798c83d45dc176208aa8e6c1db6ff14cf05791c8a3ded8226850401edc9b7ac0. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:04:40Z), 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/TCACG1501743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5fa8f2ff6ac898627729560dbe9459f4b1ec35fb57bfb0f446e6faa41436f6. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/TCACG1501745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd089a35a426be6af8762106479f9c30a6f91549bb306dd159025842161cb464. 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/CAALQ1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776f165b15545d287d6ac319b812a53f3a17fcc81ae32cb9403e2b3c0948ef24. 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/CAALQ1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f58d1578f0d8c356bfbd77d4014d0905539fcb102250e3d99cf0ac335fb2da8. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/CAALQ1600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d368d78f85552a0a01ddc8098b783864000b2a1279aa31ba03f83ec638394cd. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CAALQ1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a16f2d4aa8a67ba14684e71d64ed2424ca372a29e9ad2118a781f699d6fab3a. 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/CAALQ1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9059311863d3b6801ce62712e1d9210c4bfbdd8f90510aabd4ed5446bc1567. 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/CAALQ1600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2baec0105a32493c54b057bc5c93d7d358dbc5c34839de0b91812f606a5312a5. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CAALQ2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af3182e9430c4098a557f5d238a0a19773079161dd2b8924e129b6c12c9026a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CAALQ2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e183c1a16e179769c847d00f3eeff70c01119590a5ec8112a3d1d22efba1b93. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CAALQ2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c1ca00e0f6b496d6e3d7ad98183db7e8af319bacfbe1f4ede886001801ae4e. 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/CAALQ2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2054fa21978bc27981a44b00949bc839d6841829232ed903047755b7eac4069e. 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/CAALQ2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb76d56dffc2e97629d832010fe2aafd3e9d9e6cf7e71b6ef1bc4e70962d00f8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CAALQ2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d91c59e49c900a1ae68421fd6e15016743409e4878333d662aabe7b94fb1f7f. 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/CAALQ2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3de3f57818963677782b66078551cec5d152f61d951bd6ff7ce901b3b3eec39. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:56:47Z), 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/CAALQ2100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169ff1c082bf561cb9d3e31787e6deaade5f1a630c3ec3ed3f0de52bd777e724. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CAALQ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1842a8de16ef8cf15c92f6a902f53e6d75c25ea7cb5a39f70cc2e3d4f429d424. 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/CAALQ2500002.