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 0x1e12e489caf3a6bfc2d429cd0cc2ee9d8ac1c700160189d2a80d432906bd909c. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da86062c-c893-441b-9259-9950d0736081.json and https://artists.proofprofile.net/proofs/artist/da86062c-c893-441b-9259-9950d0736081.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 0x1dcb6981074e297e8005e123fbadd9c081bebbb463736684cb91396bb6ac2410. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USJHJ1303007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd35c7e7ebe049feab9b3d4f03f04be92f0bbc3ba80a8593dacfd9d5d62d29dc. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USJHJ1303005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fa7a77a08340772bd1de853fb81dba1cd6f26f7e054dd0b89a793dbf098dab. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USJHJ1303002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833ce9e1237b848360d2a34e6fb175d3e7966ba808c95e493880ae732c6eac7c. 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/USJHJ1303004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b24bc356a4f5c13929623d71c9b3c1f2b134b83d275b9b14949097e21091794. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USME31203026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb342464a816c907fcbb9a46cb7b4adea571c420b78b1291595a53cf9ea1c83f6. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:29:11Z), 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/USJHJ1704001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf2183fa96f9748a3565ed713fdf04b9ee7b32659e16bd960f73c773f9a5bfb. 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/USME31203024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa5d5a458cf8a3e83b39227f189302434c0d89052094e45cd82092c767aad45. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USME31203021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54aa39a1936e293026ce8c7602a3b292c50d509c414c6d98868822676baee1c0. 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/USJHJ1303001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a6a5373785b09df681fd01c373442504e3332ffb7b399832912381a5858619. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USME31203020.