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 0xeedcfb2818b8041904f81e75e331972f635b3d1d082fbca90f34db1d97153096. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/caa297ec-44df-41b6-9553-549a629c8126.json and https://artists.proofprofile.net/proofs/artist/caa297ec-44df-41b6-9553-549a629c8126.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 0x155a43723baf868fe7341e7e4bad0dc421d332d735e1e14936940f1781d35aac. 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/QZQAY2423797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82af6fa570a7a0e8b2794019530c1081403b6651d820f2c704d3d3b770a7e59e. 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/QZQAY2473428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce906af1fbc02342fb40a20c71452de1c7ddf72a8967cf98f8c05475e85f029a. 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/QZMEQ2307321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2436204c6ba7617c8fe681ca9b978fc3d04218c53580ea3597e78763ce4170a0. 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/QZK6P2393759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b3be48139684899fb996e3ac2cc251f6f02689a550657a6fa6627fef01ab41. 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/QZDA42351786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffff6ecebb9c257e8df19de81db47b1f63b22b81f6d6c8d8ff94c4fef79468b. 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/QZNWX2217148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd077c5fb92489ff17b0fb590fca1234f0413f7e14ab67ff578b37f68d29c1733. 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/QZNWX2217149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915b6d0910d82c00dd2885642343dcdf3ff1a3fc51381280c6b50a0342db6f95. 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/QZLQR2182056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c11ff1c0671ff8519b162ac1b6b988c6ee28ddeb3b9f4d28f22388649cb7494. 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/QZTLA2555564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdd189b0ca4ba40ca323ba8b3c26ffab9f8fb16f944e3693a581963c318b2eb. 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/QZSYP2406058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694089b6b70fa0ff08fed0ae92dcaff5adbee26f749cbe1607f411c319e1a645. 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/QZSYP2457650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155a43723baf868fe7341e7e4bad0dc421d332d735e1e14936940f1781d35aac. 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/QZQAY2423797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd2fa307c3992d826773f28a234ea561fa61b5f892cba16dc16bcfccaf40e6f. 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/QZS7J2419587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82af6fa570a7a0e8b2794019530c1081403b6651d820f2c704d3d3b770a7e59e. 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/QZQAY2473428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194ce22f5d22ea77fc47a4d674708e44cbfb20089854e513b8ea7e7a6e18ac8b. 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/QZS7J2424238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb167f868275c4ac9201cd88f0039fab8d2ffcbea187bb16e3ed75efef8a77105. 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/QZS7J2487264.