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 0x4115b3fc65b917de1d67c6c31cef87c267c397ec838578aa278872e55b58d2c9. 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/60d41427-40c0-41fd-929b-44e32df0f2ff.json and https://artists.proofprofile.net/proofs/artist/60d41427-40c0-41fd-929b-44e32df0f2ff.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 0x33e84becebcdd85ef9b064e8f00a7ea86cb75e44c970013bcfebe1dcfa222a65. 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/FXR142300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ee1475073d68c6182a32320dc80a4ea1643d8067c9d267a1c188ceffada542. 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/FXR142300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e95f74beeacd19d8484f5f372423ba63342f23e308b2ef9a8529a3cf5d3ca9a. 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/FXR142300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0e00e8bb9a6372a99b8a079d3df9eec014df78efaabc294be4cc69b71f1d65. 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/FXR142300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99982820fa85a321a8b46398f61db8967014ac208bc978aeb66bcb8e7648f17. 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/FXR142300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2aebeff985a960530c9c856576d7a57ee24388c9f07b8c0438ac371f0d035c. 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/FXR142300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8f2f4c43a2657ba4985897987df50707dc136f02878fbe5ee8d0ec8244eae4. 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/FXR142300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3596072e77ade88da65dd9ef4d5c9bc530539d4bb8e9702b3249577cc765fd52. 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/FXR142300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9221db6892a7ed91a931b0f9fb10d7c721cbae41e28a4e4b8a1d142546577f. 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/FXR142300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1f45f2c6a8e484d06b18a9799118792362ee44d1ca6d224ccd79ed7aefe411. 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/QZFYZ2266613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945291e01848fb8a80f67613c9faa4058e9d3cd16b2f6c99072c6701b3ebdb62. 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/QZFYZ2266614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99982820fa85a321a8b46398f61db8967014ac208bc978aeb66bcb8e7648f17. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/FXR142300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809f5c5cbaf95c8c5d57fde61f40ae46c701e749ba3c935faa127f2abdc071c7. 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/TCAIJ2434732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca7751d7e04b09eba17aa2a9ab4e45bb97f79415681defbe0529b9d51f550ff. 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/TCAIJ2434799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c0c1fdc2ae6ed6fb16e8c9fd804a98886ec41639b4377ab81a521bab6e8fb2. 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/TCAIJ2434897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9bd0ff99e6d5c3921b9c3b71bc57506580fcb71ba08ce0335dad71228aed0f. 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/TCAIK2435003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025027d0ce0cba17507bc1386b10bc37c292fd82cd3f95fd7005e572265451af. 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/TCAIJ2435031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b5bfd45d1ebb71a3ea61d208a42a235cc5b0e07105a9046280590737498dbe. 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/TCAIJ2435163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f76dbb73f93d9624ad64d6844d555c59adb9612fb707a5b6346d23602a56665. 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/CH6542437288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979a85b4312540a6a72d4311b5192499d86ec326e9ccfef88b6c698229a3be16. 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/CH6542437292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2322637f9578826a22256506ccaeabac1ae90e0ccd5655faf015235bc0db024f. 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/CH6542437297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645cd318b7238f3a20ab92ebd93952158737a146543d2be83ad704a0859aca7d. 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/CH6542437304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d39b0c54ab2cc986f0d64b6b307cf6ecac8c278524bf17005ca0dec0514b584. 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/CHA442400457.