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 0xdadcf8fdeadc119e7091145fc1291c1616f6dc750ad92032ba3ffeb71fdcae7b. 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/f82afb55-05b6-44bf-a45f-d01a3849aa74.json and https://artists.proofprofile.net/proofs/artist/f82afb55-05b6-44bf-a45f-d01a3849aa74.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 0x7a6c8df496aa9b853433837ada9bfc58f39103999a50f19d5f2db9ccc73ac423. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:29:57Z), 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/QMRSZ2200098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0173f9f2e5b3e4300381aa9e54cc11861912da9ab6b96e10d0cf04f3d55cb5b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QMRSZ2103071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb27c14fe415b64dbaf2e216cdb310e59a521c7851a082515c157b9050cda3d. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QMRSZ2200099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8978bad96972e2f55e23d977ad910e453c81764061c3a2aed93f5f80f6c8e8. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QMRSZ2103026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fad7de1283564c1e4bedf0c492a3ee458b9a417664f6e877b777e027328ad4. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:35:42Z), 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/QMRSZ2200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf812f24cf45977f45c5f29185d503cfc6d4505bc9449dc8843dbdf6dffb244. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMRSZ2200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba966da125f1e9beaba0a6b097c0a1f80e371bc5cdf19b112513d218f2c3cf22. Chain 2 (Bitcoin): anchored in block 958676 (2026-07-19T05:43:13Z), 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/QMRSZ2102608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85848e349c8a3cf12c83ef64411624cccc98e86bb10577d6d47b56d64b254b7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMRSZ2102609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcd9571f3c4b47d8fe3b3dfd40022568200f96c23d2c9ded4711ee97968aa70. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QMRSZ2102610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a472dba1c0d26af9071e0a7758ce3574f9ec7b5cecf9c9949184fb25408cb04. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QMRSZ2002673.