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 0x07d5f4ad08dd54f37b41c1c38fd02ee2d38dfe032ef8ffc43a9e8983ff3e733d. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad381e6e-c6c4-4610-bfc4-20bc92aabdbf.json and https://artists.proofprofile.net/proofs/artist/ad381e6e-c6c4-4610-bfc4-20bc92aabdbf.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 0x3ce5b2e06675e382b60d4a520cf284b3ce125c4bcabe64d1de7c1e61a899df40. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:14:54Z), 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/QZAMM1885437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f1c9881f6684a99d1ce451a57afb1369a9128507c8bdc49dae39e22d91acae. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:27:40Z), 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/QZAMM1890491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6dc59282610926bea84d96d0b59cb56c3136ced0c3bb94aa08246ee0a3d253b. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:05:29Z), 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/QZAMM2156173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c0ff5004de2a5d850e78ab41ed192cf5109a1b1e506cafb3062f40d1fce37b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZSR42105595.
You Have a Hold on My Heart (Cello/Piano/Bass)
You Have a Hold on My Heart - Cello/Piano/Bass
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3191f0d6eaa53354084f7e4c7b1e3acb1f907de19540a4c7b87106ae417fe1. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZAMM2256592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0741ce1d242ff88d970a0bfed2da23f4e5baaf98b7f73372462790eff6b70a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZAMM2271441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7006881bea28230b042e705db3adcaa86b50bce2cd856e08ede75fc7b8702cfc. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:04:35Z), 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/QZAMM2282863.