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 0xb4a007b22d02a21465de2cc3c1359ec7e04701b7d98aeec42292b0a7b5eebbb6. 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/084db2ef-cb3d-4905-96df-dfdb34ec47b2.json and https://artists.proofprofile.net/proofs/artist/084db2ef-cb3d-4905-96df-dfdb34ec47b2.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 0x710b53212c6e59c59b669aa516aa00bdcb19256ad87ae89646fd6db3a9d522c2. 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/TCAFQ2178537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad15b2ba32f4f65ff7da978c6e5256091eebd7b6f33725fe2f4a7dfd7ce2d20. 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/TCAFQ2178546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39154fc45c2594b08d6977613f6da8e62c79744cfae5a969b43755c6e0e3cf01. 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/TCAFQ2178555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca823605582d3f9d982dc3f6fe9efeaa664c070216c35ce764545a37d58392f9. 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/TCAFQ2178579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa4f106b85a13f7cb2584ef9c9818b1fd47f5186e7148d1e0274eac8110d127. 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/TCAFQ2178584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381138c52743f835b529ca1b5f8e31825e66dcb5fa1febd582a9dcc81e7ce9f5. 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/TCAFQ2178587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a40952d9453ea0290ecf6e5a62aeaa1be7ffae82a8a81e49ede005f2f835aa5. 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/TCAFQ2178603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5c22dc21a7fa6634faed7c7b5e1b4de12a1f59db694a5b2b25943d36451a0e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAFQ2178615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2180172cb54b3319b1300766fc5880602e4cf2af3fa5ceebe08a1e5b42081922. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAFQ2178617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00738cfe51bfa046ef5491241fb421948979405f3658bdcf9295b2524c319684. 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/TCAFQ2178620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7369e539569ed6c5892c6a376f5202f60a91e103d070106985d222e46d0d69. 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/TCAFQ2178624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617921358c775034130f04d1edebbed715b07298796c6e517becd90e4514c379. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAFQ2178626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d6ba34903e1e833458e12e3b1f0c033e90c1e74ac69f20bec34ece02964d2c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAFQ2178629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160aa4e8c760c4b1a00890432afd728b57fcc73c72973a6926c5c22785bf9ab9. 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/TCAFQ2178631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a3773f2049ca68e52fa697d5deff3a5ba1cb455ff35222098a9d917e808303. 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/QZZ972366082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e61e0de36aaf34f70df45b45838584f11603fa66191ffdb2e2e67e5e6d4c34. 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/QZZ972366083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6bbe8039e3f68d07de6ccad0bb9b710e8d4671ccedb588b739b807de74307c. 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/QZZ972366084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f738e68c00632306d7570517571bb7e8a1142387e19c27d709f8886d7244bb. 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/QZZ972366085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c7ee5a9f566c7a362b161da7cacfe3fda047e782efb0defa221eceaa4706f3. 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/QZZ972366086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a05ffa825ec77489f65bf35135c7e9a278d7dfb83cd90f7db0ecb01ce2f5498. 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/QZZ972366087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80c34f0e186e8694f80c2fa95157ddf42c0169b0441727204be28214b07c539. 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/QZZ972372015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20276b003c7b572ce62257b7a9046c526c84e8e8398eaf51c63f1beb906fe162. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAGH2265386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cc83f928adc28ddca7fa14022aa9ce3c6618f3284c5913ac5cfb2fc3e0e70d. 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/TCAGE2218234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe304d015a97f2a2a1831584f5ca71a12d684b7774b9e1cbdcaacd006844c1be7. 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/TCAFX2194781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6667dad473a2ed2b92e7bf7c255705882223681a94c2b33eb4b9e7e1b0670e1f. 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/GBSMU9693391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aec8960cea39616e1ebd29f6ac73957700283cd79cec7ba916d8b4a0a0d46f6. 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/GBSMU7959621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dcd055745f11f0afc933bf0b30505a9dd2aca833b82faa721d830ec6a8ca77. 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/UK3AZ2028048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed92893b126935f1d09d736e792d7b7ba239b8b1f15d4a02a98cf6cb8566b992. 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/USCGJ2447839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42be84c877e630841c7f7efbb4683691408ce5d085d8ebcac918cd2b832237d7. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/USCGH2396600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42991a5fa5320b7a3eab6aa4067de9afc7b0d3c8b3fbd59a60ff8135b5a22ec5. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/USCGH2396601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb69477bbb9057a37f5bbafd7eabc8c336e53a204c33789f271a087f76c6379d. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/USCGH2396602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831fd08a3e3e669398257a10617af685e1d01e498c5024894b1f825e4d116dc2. 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/USCGH2396603.