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 0x7a2e3edb30af772290178a5165727233bb5c7709b55f398659262b8a3ad44d77. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/800524c3-9eaf-4a25-88dc-cf45e6aae330.json and https://artists.proofprofile.net/proofs/artist/800524c3-9eaf-4a25-88dc-cf45e6aae330.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 0xac91e2b68e4a27853ffc09f8dbe6d08ab4fd5f4eb09896f1cdc825454acc1364. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:24:27Z), 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/QZMZ92589934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc81a1678b64c360a5bc1195ea7e8704c7e1d7af49947a8cec32b8c3a0a72040. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:26:21Z), 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/QZMZ92589935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54518ecdee30f37fb23d655bfd1bd497ee0ce272f6579aabab718cc46b684d97. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZMZ92589939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cc5743c3d14d446702929b26522a683c0eb4c7ee7590769818eae07a43a547. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZMZ92589940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd57a13967ee0c85d3cef22562d6f5a9838585651dbf08048df078725fa1dd2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:10:58Z), 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/QZMZ92589936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cecc33f9ab401dc470dd65025cdf6cdf2fbbc09a14dc27b667cf09f8234997. 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/QZMZ92589937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa5526cbc283aa5385ff7a3f655c5d583206f3c42bad725f00e9fcf1b792a8e. 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/QZMZ92589938.
Corridos - Bom Vaqueiro / Boi Malabá / Caimã na Lagoa / Volta Lá Volta Cá / Por Trás Daquela Serra / Marimbondo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11eb0d650468d292cc3dca86ffd8d52d9172d132cba698bca20005ec9b117411. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMZ92589941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355fb00a8a2edde04937662590a91e0707cf9b7fac82d83c590b73065d091a98. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:01:35Z), 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/QZMZ92589942.