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 0xaaacbd88ec636095b3f5f8b95769fa6afeff69c098302c9cac1812310c55677c. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88df77d3-bf8d-4999-8095-27e8ddba2aef.json and https://artists.proofprofile.net/proofs/artist/88df77d3-bf8d-4999-8095-27e8ddba2aef.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 0x73b9d22cbb429e634659b12508dec1ab6ca578390e023718cf67f97942a58621. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEU672301085.
Look At The Sun (DPAZ & Landikhan Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0bfbf39458d085d50c24dcf0c6b2b64ab9253350e2d0594b86678d18dd81d2. 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/US83Z2217541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d971865bc0298c2fda1c95cc243dc987f059b38ab5865708fde73eb313982fe. 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/ZZOPM2223014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e400726dc7a7c36f3bd6c0d53a4b9c4ea10ba6f5e8949cff0db465f3eddd6d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2131928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef90579b1840fc0cb9dc0287b51cc8ee05e8a59b030cc388ccd1a1fab1e3f7a. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/US83Z2131929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d5577b04a39e1736d6360d57b297d6b5e99ebccd26310172fe75d2219302db. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2035185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541cf20519e320cfc406ba28a020c91bf269d82eb654abf7a35cd3f1928cfe6d. 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/US83Z2035183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e640e654f0a08ea66683ebb083be984dbfeb869989daafd30834a60a70f78be. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US83Z2035184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cac42a63aa6cb949b08bffe8d1465a98f1adc2dce3ac4a37a4f289a97a7d6e. 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/US83Z2028158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0516b01bf076c180f94a243e68a8903ef717d6f6b8e13ca27b33c9d56b54421a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2028157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07c6e7fa05568c74bf06b2f391520df8e3df7c6eba89ded0ddea70607d74445. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/US83Z1904756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc169faf506f113a58c0f8102969639236a434f491fcb714d45b3105dde2c63ca. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/US83Z1904757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd721d965571619a64e581c8cb04da730660310c23612cb3b4aa5498301cc52cb. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USCGH1938718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x834b571957b9e59e8828b76e270fc54947ce5103c1df7d27da08ac18d09d153e. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/USCGH1922247.