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 0x40075e45ce48e39a035d6bcb626ea04403c517dcd55c17f316ebf281bdd5aa34. 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/8555a602-9e8f-4bdf-9e7f-3e93cd400ce9.json and https://artists.proofprofile.net/proofs/artist/8555a602-9e8f-4bdf-9e7f-3e93cd400ce9.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 0x0204bda14ce41744361a67119febc8068e689b6c617a4d8561e5f7494c8e14b1. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/USNO10163201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ef733c0d5f20a233ec3d95d471528e1893debcc110b060ad889637d659e696. 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/USNO10163202.
Heitor Villa-Lobos: Complete works for solo guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec60e4a83af55f1d7a6484adafaad653ef9bd0970b626f95e4ac92ea792fd2c. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/BRKUA0113901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36da0f485c8f93253ea0ba4e2ef4351dc606e2810ba7e7389b68803ad90571b. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/BRKUA0113902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdb225c2e7b5aa4dba0827eb12b919111a76fd423822df4b640ac78a8d62d5c. 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/BRKUA0113903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8a514a3239552a1d332034762256647c679ade15fa90e94d461c4b70b5c9d3. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:04:53Z), 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/BRKUA0113904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39619b84bef1725cc68f9801b226701296598936eb648d89ec08293ea57ca7c. 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/BRKUA0113905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4d863c2948dfa9a4584b7df24c82848587e00d21ebd851ded6fdd4541d37d0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BRKUA0113906.
Suite Popular Brasileira, Schottish-Choro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12763107e4402b91db4e17ee178777e5aaf10276294e89e4591f8d2c3c5ff092. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:44:14Z), 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/BRKUA0113907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278e1e9214d8f9b49ad8859341fbdab1833303103ca739f345649dd598a11f8e. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/BRKUA0113909.