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 0x77a3057800add192ac70ec7c010dd1f9d37b906fb5ec75023843ffe615fbc4a5. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0fe67ffe-1831-49df-b46b-3c8668e6a559.json and https://artists.proofprofile.net/proofs/artist/0fe67ffe-1831-49df-b46b-3c8668e6a559.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 0x31fba517cd99e44c75d2b9d0c3c037285a66318caabac46365900a6f7475713c. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/FR9W12342058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25882e06c583e1a746def0454fb2e72e01046a4e1fdaacb38417d2839ee76a4. 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/FR9W12342059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcc9d8991ec5111b8038afec01bc5e846de0d6b012f0b74eb1c91cb0c0b762b. 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/FR9W12342060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x158b723ee24c8709adcc53e7673390df0b8b9a138ccdef318a87af5ff972d2f6. 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/FR9W12342061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c3a50dd33db5d7287b227c542f26e739e3bc3ed646f517af737be14424c2d4. 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/FR9W12342062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59131d693a8e0c0c959ad59172004dbc9a1c589b4da38d237d53dad56da32d16. 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/FR9W12112680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0841493ab1bde89fd0456fa6e8b06bb04dcf25dfdb091f43f837b4890c79bb. 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/FR9W12112682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7a1da3db3deb4af15bf9863ae664617c2c575ab2ad8c34a4493008bbb4826b. 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/FR9W12112681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd037a0d664ccb3f3233d07a28d7e0818aaa4d6e6ce08d18ae038f2a29d4b7d5d. 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/FR9W12112679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca10755c196d01237d07412006bbfe4d660770d7620b44f6af84f88f32beb9e. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/FR9W12112683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59131d693a8e0c0c959ad59172004dbc9a1c589b4da38d237d53dad56da32d16. 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/FR9W12112680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd037a0d664ccb3f3233d07a28d7e0818aaa4d6e6ce08d18ae038f2a29d4b7d5d. 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/FR9W12112679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbead115652be2186e3e5a616b4e000c9c90160586485a851e4aaecc7f3b330. 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/FR9W11923288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe5ec02a9d3edad037b9fb22de4582927623f5c1679c44a4fd44965e24c3be8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR9W11923290.