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 0xf9e6673bfec5a7416b140c686e1dd6d92e91e1f3226c595992960f5a7957cff3. 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/f2e8e78d-7f9c-404e-82cd-f6f3a2e07dca.json and https://artists.proofprofile.net/proofs/artist/f2e8e78d-7f9c-404e-82cd-f6f3a2e07dca.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 0x81c23a1b3217dfc62c7f1010e267eba0ab429a3e4237711d4693605b82092d88. 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/USANG2149560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bc105661501d6695fe06a8d31631fe7387ab944314750d88ef1ed610e643f6. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/USANG2152018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34572da72d0073ba8a6af9c80f13229ef199cf8ff786db8173f886c75905af0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USANG2165421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750f93f5cfbb9859f80c67adcf5d66f3b6286d56d19ed9f8e6d8c70b10cc94d6. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/USANG2165425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7314f88d0d1f4c2a84ba52c8386e95ad9278f5d85e169a8f1c469f5374bbd31b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USANG2198573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc2680786d4159e37873d7bcef36a4c9112385b01baa116b1e76b91be6bc1cc. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T23:01:50Z), 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/US3DF2102451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d6fa8d49e96378bb34f056107f2ad795f4fb2e8d23ada73eeb87a474a00d6a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM3DF2114122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c17551c8a8265ca045098b7d1e8f02443d1962c94c07643360826a269f9e1e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZ8WX2060650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f599410c633d949f551c4724b46b86b79efc071a7a9a86aa8d6a7272cfa105. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZ8WX2067863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e0c362cf8b2abc3533a0f463fdd528a2aee51be621b775e95d89128d56e5a8. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:39:16Z), 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/QZ8WX2099580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16967f6b8c90fcd423efa0d7eb4fc04c3d386d1031a7de7686174dba0e65e53f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZ8WX2204464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c38b182eda251816278d21b5d9b481010e7256d2e572fe0506dbdb8a672693. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:17:04Z), 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/QZ8WX2210136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26262825e19aea57c3eb5c17983bb60236c451a25f5e41b4864a9d4ad478d66b. 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/QZ8WX2211564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449f0183180da85c67d5ade704e428223f061d7d620eba14f21cd4166ec7d61f. 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/QZ8WX2211801.