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 0xab7245645a93582c9e4656e31c91fee735bbc9cd20df5c1b2bdea884c30a1526. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f79ac835-2419-4aeb-b0d0-b7ca1ee10d38.json and https://artists.proofprofile.net/proofs/artist/f79ac835-2419-4aeb-b0d0-b7ca1ee10d38.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 0xddbf2b64cebba9b661d7464a3cae3ba204fe28be1f4b1b30ea3b8e5befd6b877. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMDA71842764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bd39e46da639096368ff0b2d223060e16f6f11a7491fd4ef3dc41e79fd9bc9. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QMDA71842772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cfb6ae8fcc410f8cf0458286816d816eb8491873749f08b5abdbf1e3aae67b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM4TX2026578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e4beb1629268b7cbcea1776099749b09f65ddf727a7c8e6ad40fb2b3828210. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:06Z), 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/QM4TX2026579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15ea1fd57b0c0e8cfab3adfbacc9efd6843f4ec1e288610e1b01604d6bc695b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:40:30Z), 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/QM4TX2026584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52fc2bdf77538bf02d2fabe490e478c00032a5f082b86cf2226715df8941fbe. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM4TX2026585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae09660019c4967277e28cd98cdf83952c9bedb11dc4ec89cbee0103d7b58213. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM6MZ2443829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb793ed7d265f6d52541a33154e70f0373178f901f69584148b7f9a891250b1b9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM6N22438449.