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 0xc63670276e84bcc6f68cd7df24ac1646c403931a24e8cf52f8bedfa5465f44e2. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75782955-0126-45e4-b7c0-2bf0364aed41.json and https://artists.proofprofile.net/proofs/artist/75782955-0126-45e4-b7c0-2bf0364aed41.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 0x002dd371dbf07209a45a72b82b70710f78776e984ab7bbaae8138ea542c87849. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NZDU11501105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ff5a938167cd333b3f9408cbdcfe6b64c122be708e04f1c5e6287581bb2149. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NZDU11501106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13896069d47019feb51817ec0ca8435ab808bfd369287785fbea8f0e3de2b39. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NZDU11501108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91ce831d637ed2cd0141ea7883bde083c39d997497a91139e7e1f54a27186cc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NZDU11501111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f866a2f461636152580bf5aec0d6e44aa4d88a645cc677f886424664bf7484. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NZDU11501112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e37b9cdabbd01f0320af52a191bc0441f89dfbe34d548d2c394d1036e929e12. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NZDU11501107.
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 0x6e5fc63f095d22f91bd5a24bb264b2d079635cd3fa5a8d13ed204c13850fb480. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NZDU11501109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44ff8402a1da773f9d097fa74ae4bdd5d847aabdab4d7bb8cc3f9e16008ccf5. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NZDU11501110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8f1ad85e1a957fd1cd4b0444f811eb117c3d64157bccbcd003e72479c9a565. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NZDU11200830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0189eb128aeae17c735289050a51030590baecace26625bf539d9703eb552cd2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NZDU11200832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac05c0799b78f72ef7084997b1e9a17b1b7bfc54860c36e624762d8137510fb5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NZDU11200834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fac589fff9123dbcd5c937e317ce98a094e628e0b8b1a95a1cd488bd12a53f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NZDU11200836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6caa995e3f17989b07433df5ae8df3a8875901c7dd0b7d89dc0c7f5bd11bb8f9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NZDU11200827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302bfacb88eec9bd950785518e5eea6532ad45c59ee17f7d367a9c7ba7b4fd1a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NZDU11200828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6724f04120170dbba37c9bf69a23e57daaf2c4025622b90f2c5a504053647a. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/NZDU11200829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6f17cba01064dc8ab705b0aaf6735c8bb1dafa1d6ebea3b095dd8774009a2d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NZDU11200831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fffd2544e93fee8397c8e5849b13199ba5490196de9ee2cc2a65c4dc557c4ea. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/NZDU11200835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3582ea5297d124f2832ca895eb3db7315e913130c05a958b3eca044589c6112f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NZDU10900309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91caa8ef88e571d2d081d7cfa0e875d7cba47f1b4b9542d0a49ccab6296b9ed8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NZDU10900311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e11613b062c2b7375acd58451362fc038d37cebee9ae388344ba800d98747b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NZDU10900307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7638800e88629e764b3e42a029f508913ddb5a4d3154c27ee00db8dc431a9c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NZDU10900308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae93f668345a74b9ef39e54afe1bd1a6a7cf6e49911b28cd78a1dec8a253780. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/NZDU10900310.