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 0x729320e33723b5db4fc95f73d137c14c08a1fd4762773c0a0e5ff7933a690db2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e5496a2-5063-41ed-830d-5c6a6e0aede0.json and https://artists.proofprofile.net/proofs/artist/1e5496a2-5063-41ed-830d-5c6a6e0aede0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sugarloaf Mountain is a peak situated in Rio de Janeiro
Sad Brazilian Beat for Homesick Cariocas
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 0x4b540214c06c3640fd4675111f3feea3bcbc01595dea7d33818fa5e4bc4bab80. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWU2115115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f11514c2b8e78acf548deb0beab90b28817b131ab9abf55ae4aa1703c1500b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNWW2162592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79759d93fe1763fbc82a7ea4e80aa451612e0cb7fe78857bb3d2734d2350e937. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWW2162595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6a3006a82496ae803c6f315694793871e0ce50c564dce9d3f3c8a27e064dfb. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZNWQ2289490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea1e0bd1ef6528c8633f29a0fc16342be3d86506a5663fa86696c52e27f5f4f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWR2215032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7d6d97ddadbd4624f840789a7332f3c07cf09bd1a37237e030cfacd6ea1876. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:23:13Z), 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/QZTBB2213021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe582b172f8a3546b0c09ce8725826a67defe13db72a9c29ae4accb56916e9fbe. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:19:43Z), 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/QZHNB2367400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3abb38b31f45ba7ba323b1e910c009788dfb7ca06224f0ea72ae3d9988e99c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6H2342403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba0801fb7632286a93ac1de124a7621ab0ed3ad197ad677696042e01e3bbc64. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZMER2316895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3a94afef0d0d205998b2fd46fc80a55298ff55c16b1a5227fd255da1860041. 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/QZNWV2324253.