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 0x1adb024a1cc5621827315714e90fe0b81f1fe4dca2150566fcdc1d3a23840378. 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/98721bf1-b4b3-4b43-8a85-a6c56eb6f110.json and https://artists.proofprofile.net/proofs/artist/98721bf1-b4b3-4b43-8a85-a6c56eb6f110.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 0xefc5db8502bc91fa78dfde531b420527832994a29ca1e6d338d3356504ed981f. 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/QMFMF2380144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99706ddbdcfbdfd7918aebe84814c721dfebafd16dfba7b9620f49425ed336aa. 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/USCGH1923649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f544705bb5a3e3fbcf2c16aa998a390d17a100fcca556c96f8df59950cbb948. 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/USCGH1923650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2bdf4118a0dc7ca69ee9975a1a45092878096b075b6045922e69a036f12d54. 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/USCGH1923651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f99dcc1c2e6528c1339ee9656762ff5bdd3f6c2849e5aabfe1e1a8714d7850. 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/USCGH1923652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b6f79089d8035c98069c19fae83881e8f2b9e4a156f8591211021f8eda3fe0. 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/USCGH1923653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0869b9687aa909374d40e3fd8d9f452e01e698c375723c1d36e49f04c0d370a9. 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/USCGH1923654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2607bc6db5b385a8b81660b966d54ad10246451ee90a34eb8003207cf6e54b. 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/USCGH1923655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55edbc238d6451ed16b854aff5af5f3a50dc25328d03ad08d43a3001267eb04. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USCGH1923656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2597070e00265050136db5490c0477defa9f3112b3fc78c3ca3a0437823809e4. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/QMFME2345652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69dc6818a4c746bb8bcebd813e12b7564863055f38c1f585549ce8260bbeece. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QMFME2345653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8530d22e2df696fea0cbdd126650cbdb1874b3fa8702a31f8098c6afa8935034. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/QMFME2345654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55a880a68e36610aca6de100ede0aecbfd4d7aa072ca140ff40983e74fa6ad8. 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/QMFME2345655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5e0e29f2e0a2b83ed52db1193752848f822370e80ce2f5404ec73d7dd22d2a. 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/QM6P42361589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31c4b8c20000e05994098c732033198a4145a154348960eab5b5d05bdf2b69f. 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/QM4TX2334766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9176cf01215311be1ad560b41ab76fefea6741a767bc0528406d2371b991a8d5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMDA62276584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3a8f3b0ec5ede61360fac89705f4aa7e55ac5adbf86ee33f6174785c4f9ca4. 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/QMBZ92276017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88171b9e0a0fbb94018781640cd353218398e8cccd660d107e570e0992ab6de6. 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/QMDA62185744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fed66ecf0043ff0e5851718870f97772e7444ae176280b9f00b2f4a061602d1. 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/QMDA62129477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63068f9fd5a99348f5adbcc25adb7e74e1069e005c9084815885720c029dae88. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QMDA62129478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23e186cc504eb2ad2e96008a869cf5cb41303437478a553a6412d9e07b93148. 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/QMFME2170301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a3f2f0179362fae7f754e793a100b94a439d80ba0a04a593f588f4d80a5867. 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/QM6P42173886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625b63fe68f2f6099686a947d1b850e60f503079148238dcb456a03c9316449d. 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/QZNJV2095130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4898e3d48bcdd317d3237f498967053ce260d06cd50310c6dc2de299dd8d1b4a. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZNJV2014592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d077bb490cffd0d7ebc0975cea936764aefc251934523768b02c27d112b126. 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/QZHZ62045452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff51571a1ee4e1fd61b76f30c612ff0bb9641262adfa1002f5524c8c6bd3b6f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHZ62045453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeec56997c40e0f76e10d383e034312157d6c72d5fa3a595c71eea7caaf7c0a5. 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/QZHZ62045454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99afe2720da2d957f94b9418907f0a73c23eeb547524f11e747ef611d97c2a1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZHZ62045455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217282792cffbb1c4fe4a94b678bc326e51dfaed4c079f093dcd4188b24aadd8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHZ62045456.