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 0xe7b503a36811386e928ef1d87adc62ad0624e2d1fe823739b23705ba65efd0e0. 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/68314699-d402-4c08-9faf-6a26333fe4d3.json and https://artists.proofprofile.net/proofs/artist/68314699-d402-4c08-9faf-6a26333fe4d3.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 0xd3bb0728618e125a0e200227d0a15e95a0e68deb58d6ec03f77b06f1110c5914. 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/USL4Q1942572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11a23c26da10fcc166b4817db55a98fd4d28603b6f8e206d375164398364832. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USDY42065466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7055a7c1d29f5cbb7bf2ecf71aa3562f6b2d9e63404b527593fa4440dff7d017. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USHM82028462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fd637681f8fae82e980ec6a7bd2fd51cbbf806864bd4036b15832673acd864. 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/USHM82028463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7667485b49ed9b88dc467605cced5b04e039917a38596b14a33d57382e23728. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/USHM82028464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1c78b88a1f138e19b06d248885064df8e5ea42b46ac9dbb14994cabcca379f. 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/USHM82028465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764e37bfc37e7bab0a57ea6c860c0e7d875d25b6f9e4ee9d19d9a7e50f452b42. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USHM82028466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2434ea3c512eb85ede6fa851c205c4db04f41037c0069d7654476623fdf88a98. 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/USDY42213384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3b6ac96925300bbc1fb50b71aa1355c90ed93313a9f3978d7b395424146877. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USDY42213385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e10dcefaa21445974c18a5e9b944ea3389e8ec2e005ea69376145af3168e41b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USDY42213386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb86e03b7051b6ac43092fa88c4a3454ad4a405cbd683623be2384d9a65a206. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USDY42213387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4980d976d058dc382d2ee038be3f5cf7ca486c420d870c217d8d23da82a2514. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USDY42213388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6345ef9b65500e3a551de16cc1453ed2d9e8bb8c475a3b9eaefa5a03b8692197. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USDY42213390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19919b4d6f183da5a31b11d59b0d293e8291fcfa77339e1291eafce7c8c1db11. 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/USDY42213391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5dbb39876434a9c444e237c60ccda0f7bb8c4e43838d7e3fc1ef3ab4fd7688. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USDY42213392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a3bc0815cb5cb0d73a21d9e0501c218668372418b4db51257faefb4e8f4d13. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZTB62355679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac0b626f843d8ce097fc3709a6c3636364e10bfaf4232db4cc40c09ba7313ed. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZFZ32423303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11cd0412e42e792bffcb5ba5f44a09999a84f8fba7ef7f45afa68f9a0fe1e1f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/TCAJJ2547583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f2ef9a99d5e820b8a5b9947df9fbb4d09a5cd0a48f45a7a6139fd292cebb41. 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/QZNWS2420768.