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 0xf3cfdaef1d7dade84496dce8012b4d6b3557821e52749557d103629d41dae289. 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/5f771a15-454f-4455-8b14-4e0c106049a5.json and https://artists.proofprofile.net/proofs/artist/5f771a15-454f-4455-8b14-4e0c106049a5.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 0xb1a80d2bdb134b71b8218248d8adecbf27b7c7d7a4cb099f0364b0f6fff601b0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM42K1704501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2971cd7d4d4b1a70c5a35725d4e2a8470d026ee5baab0d6f21ad0f0be8a4e52. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM42K1706697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd24fa241e7ccb2dfb2c712351a2b93cd9855948f80998fb6571c941c816669a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QM42K1776860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49668c1c2faea74d61b76c452df70a43d2ac7748e9aa3cae6ef42d8510c74dd8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:07:26Z), 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/QM42K1716965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa61dc369c4f412b4e9201c894c92ae499381abea22ed5138ceff36d599f94b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM42K1816184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910a74ff014a47dffe3d7cc96ea6500951f2514fe2b11881f006344d69f623c6. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QM42K1880830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf7e1d3677f4809ead9a5276f3a94e6605064c244c15df5983985660b696aba. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:15:46Z), 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/QM42K1868360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b169e9a61a735957f21efffd3fe0990bc4622b5619923663b676422f923143. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM24S1821465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb802a56a587995c7cd55c1195b510142d3a9df6ce6db05ff6c177c9536f8723. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QM24S1821466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b39bf84332f1086abf762e11d22903a067200bf3a098d7cc576240a7c3edab. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:55:36Z), 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/QM24S1840977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f766ec4431378d5fec7724d16940fe5a7c873ca0b369eec8bf4e96263f1b324. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QM24S1840980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9553490eef7397fc9fb251e4c63c079f037623f1b81361a7e00af8d8eafe5278. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM24S1840981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961f84af16269f6a103f31fd1c6ceea00ce67dbffde3db9baaf63f6b0b81fb4a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM24S1840984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3dcf9084e462b6b050fd533b5f5a9a99e2d89c37220c5d14bedb744a07b7b3e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM24S1906542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9644b4c70e2fa90c293437e337b7b19a5a1b23e23900be37fef0a194a4df4c8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM42K1943184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa08206d4f00e04255f8cf7fd92d9428045ed6875cb7384c449c6d7ad5a4489. 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/QM42K1880551.