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 0x18f0b419548189eb7df9ebf15bc6f94faabb4b2a2a051c0da348650a2c9ff23d. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a13215d0-1bdd-4cbb-9de0-fab32022dfbd.json and https://artists.proofprofile.net/proofs/artist/a13215d0-1bdd-4cbb-9de0-fab32022dfbd.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 0x798fff01fb3fce82d847cb3a23c34ac423a9c18cc331405857eeb5983d34283d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:43:00Z), 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/SEVGT1001410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9cee2f272ebc4d38e0a9823c4908a590dffe07492f748a00784b2716e835de. 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/SELRA2300601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x410c8ce5e29c36bddf58e3d075617d77b7b35eef9ac132b1b38c487a3d14001f. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/SELRA2500501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefeed5d8e67e8f2e4f3922edf9eec44de1868551ade6bd64526f23917af57dd0. 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/SEYOK2502458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05b215d25c2838fd69f56c415fee4a199e665c31ac2c063fe99460e89a60119. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:51Z), 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/SELRA2500502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af567d7f428be5858e2a092822f3a0f9b3a63de452f5825a9ec4efc158c8a3e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:32:24Z), 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/SELRA2500503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4321eb3cb4834bc8b92aadbee895450b141c91015291f18708de3dd9c78330. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/SELRA2500504.
Anarchy in the E.Y. - Electronically Up Yours
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7253c6228dd6dda83f2c7db7b11ab4d8ae521f417c3b37d63e61effa7296da. 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/SELRA2006019.
I Sometimes Wish I Was Famous - A Swedish Tribute to Depeche Mode
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4307dbdf9243ab0432a563b06f824efcd9548fe852e19d9f05b5b9a08eaca4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SELRA2000501.
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