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 0xbc76ec075ec0f9b2f0e0ce5504ca5d06d9ba0e8fee04ec718240735d8c27cd4d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90131b57-939e-4131-9a56-0553f813c513.json and https://artists.proofprofile.net/proofs/artist/90131b57-939e-4131-9a56-0553f813c513.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 0xd786f2698335af32b1a41d3688c6ae95ea6a3384a974e58a60e35a9ec6745a9a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZS632177875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed06b299846795c4b2096cd6a0cfd68f9889de225cb083e01974cee0caacb1d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZR422104790.
Permanencia Rebajada (DJ CHIHUAHUA Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67549dd19cb1e1db4e2e7bbeafd0e8ae6944132859f9137d91e6e426952440b2. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZMHN2482521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe828ad58e9d90312d974bb263bf4f09b62228eb16b12e76099d3a053bf12046e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZS642563094.
Las Muchachas (Mexican Institute of Sound Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f0c74cf6a260f2c8b7a7cf8c9ce95057081f5ea8058dcd0688d13863e37ae6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T14:04:46Z), 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/QZR422500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f0c74cf6a260f2c8b7a7cf8c9ce95057081f5ea8058dcd0688d13863e37ae6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:58:44Z), 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/QZR422500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f122a92fd34a1edc9de74abc9ec934a3c9434cf5f9f84fb86947b0a6486cc72. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZR422500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff7894bba02b532cb5ddf34b47937e4203132849750849f33369c07325ae33c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZR422500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02bd5162a6b8c5ca0554e1694c5cbf4721c958038ed7cc873d8d12e13e9033b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZR422500009.
Las Muchachas - Mexican Institute of Sound Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fee6b65a377cc0005c01c38d5e4077e3d43217a1a4e297f5ec677a1043053d6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:58:07Z), 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/QZR422500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea60f228c86ecef0ed12b88f6b751c511eeafddb211b177831dd238acfd3c7a0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAET2005394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa363e3f5eb799ba0e4d3416d51c2c5ed336a9062ecc75cf921349724aef05899. 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/CA5KR2112374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9706d2a543ea6e5b625cd25a6f02b323457801c6cfbeed83b5c6bd38b79d0a04. 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/GX3Q92329125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7153e51d70da14bef7567d9e4dbd8e98ec67d2afd7e9ec204672681ca9d7b49. 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/QZS632453364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcbb82cfd7baaecf3c974a3955c0f529a5375cc823ce37685bf4652b52b2303. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEY472378899.
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