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 0xa7917c321e74d74e88d1f45a2bb4255e76dc93da514784d76ede571dd86e2883. 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/b3c2cc51-fb66-44db-a315-f6583cee1a54.json and https://artists.proofprofile.net/proofs/artist/b3c2cc51-fb66-44db-a315-f6583cee1a54.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 0x1fc9ac33aef50c10178993dc25548680c15bb58c989352ca9ed86f653e473f91. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/DEZC62408091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f82d49b4ee514a25e213ba8dabc34d964eee1a3f0c4ace0d71be441cc332a4d. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/DEZC62408092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a6154cc121c8dcda04b2b3df6e794920d7f6e8b64e9b5fe3e7d247cbd9e826. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEZC62408096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e7c2e3b4c8b107be4816dd2313b91d42a3a76598e5c78898b9be83458a7300. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/DEZC62408097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f26f7ab7e29fe6f5893ac12fd1766db726c401bc2b8ce6e2f5d5a6b72bfd43. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/DEZC62408099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3432eb8a288b67abe55a1d16a9038bbf349259438191c755c535264c17d73e0d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEZC62408102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3e737af3f9dc107220277fd2db28d9fbdccbd1ffa64244b6df053ac2a9ef88. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:32:19Z), 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/DEZC62408104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a0c19fae969b44412db9b4e5e1c1883dc47d5d180d7bf4017eb630091862b7. 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/DEZC62408105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7871c538c52631d8664b845e5a825e9ff68903e3388ff36d8f284aeef4a8d3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEZC62408106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcec09d4289eb225f0ad6fa204401e8be890a1fcde138dad3bf47f560ef2d662. 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/DEZC62408110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5240016f29d93aec938a25a4e6c6398e04695ccbff49052cffbdcf386f99c42b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:10:25Z), 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/DEZC62408111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c6d88f3d8c30cc05e22e9a7be280f283dbb897ed417c96d14384873703741e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEZC62408112.