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 0xcc417d6ddeb52ed80c5782cf1da870ffd3c06f6cf92b4b9b296ff1be4edcacea. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a3ade18-8a67-4efd-bb01-276f2389ab68.json and https://artists.proofprofile.net/proofs/artist/4a3ade18-8a67-4efd-bb01-276f2389ab68.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 0xe306f11ae9eee1d9a1bab6e02db6cf656e2540985d7fe7aef566f45ccb0a4413. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USHM21778038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da5a1d0a7f47af4e9eb33d4c53d129f0475e08a352fb1761c2c5ad06b27b086. 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/USHM21778039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afce219d9abd265a797233cc0d4828f623b5c9032562d7a9258e0b9b00df811. 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/USHM21778042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9182971e434be3db2b5048c62cecc16df186b5700e024df63706b7b6bc255415. 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/USHM21778043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d68dbae96dd107fe2d94d3b89bd097e5b4423c7b8195e12c5d73f833366bb2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM21778047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bbbc0c9495a46b2dafb77d1c215e9b07d8405f51e779de4061cfc7342b05e1. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USHM21778040.
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 0x0ca1356c17677bd69ca42e96e469a550a9a53b0bd2c065d08dabad3afd53e133. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/USHM21778041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d638df239e8feba444641709a43b3f99f94106a6e32d7068f43875fcf964992. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USHM21778044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf33adc622ce4739c5abd3cdbe04e6e1d66855d944852da0391fbb5bf1b7b90. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USHM21778045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce46042e3dfa44e3d7340804a908231c3e5aeacad0f481448078f1bfdf3d5573. 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/USHM21778046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96d78b65fa37eb81731f05957a20662ca9bb2172e8be594fa82ac5ff7cfb86c. 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/TCAFO2177801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a8791992dc87926d05da7b01ec6129944cdff1b654ea900ea5a10120ff402a. 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/TCACP1638111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc89ebca6bc460aea9c4a9ac75c1911bff09136ee544c67af2ec96ef0fe9a83. 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/USHM21540650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4712b19bdbfaa90575dfc2718103841757a55de3aa1013031f8b6a82cb6e4b. 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/USHM21540651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33d8013400cadc4560b7024fa4bf32342ec51d3b499d3c2cf535c659db45e7c. 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/USHM21540652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1ce41fb9959472d46a89795e4a8d125ce631e18951e7f3bcb99c5ba1c27bb4. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USHM21540648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e0445b99ed9c17130b0034850b82b37688a9a46c1996e390a0a01be110e7de. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USHM21540649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a00cdc0a04c54133d5661dda4235858cdb28c862ccfa6b05646d3454dfff42. 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/TCACD1583069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26f24f62a009c1c365ed1a16a2efe65ee0e4805026632f60c8903b05b89dc20. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCACA1436605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e969f9890b18a34ea0cd6c0879678fb4a535964b38f1ad21dc22b82a3363db. 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/TCABT1492534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7d9d7ae63689318e06d33ae4774c2d16bb17e55f7d1cff552015a374b94d1b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCACU1632513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1a2cce33c18f8e713f59bbc6eadb11b514e04a5335ec07de1a115686d9e75b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAED1962003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e5fe5298c336cd180fdb6e0431ec0427d32f2ac8c41c1370b00501ad01fd75. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USHM81449023.
Malama Aina (feat. Peni Dean & Matt Liufau)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4202fbe8bcf9f9ea8a59f9f62f352aa69392ac711ec4c5a17826e466e9653bf. 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/USHM81449024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9cc99f4bf65c24d65256c0516903d52fd78f5a6ecf1592dc5bc90dfeafe60db. 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/USHM81449027.