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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 0x229266306b5d42831b0584e9717108e864778a34a588a023431fbc1405b8cd77. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78375687-472a-4037-81e2-1219eb362597.json and https://artists.proofprofile.net/proofs/artist/78375687-472a-4037-81e2-1219eb362597.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 0x7fe6ac1d46dd1bd4249ae4e70de7d6ab230e5cb208025b544806bcf1e551f323. 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/DEA710715690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ea37b84385cf6e9f1226633772e398bb5e50206e9f50965f9e39e252bdf230. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEA710715700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc407b9db9af06e71829c9ca526a4cabed5e2b964d502b1221c8ef87c7c653ed. 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/DEA710715800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3510e936616d9cef5f6c6533ba3cc1da7091c4ad48e82d57993d582924fe0c5e. 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/DEA711102850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7b752a995b56fbf0105400a406a3874e0b33ae2fd01865f95186570e447650. 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/DEA711102890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913c4b4976819612bd1a5fc0b409c62da966a8ae648dca6786e502f5a08c4c85. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:25:57Z), 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/DEA711102920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79c7cce71ebf34b36c9bec894258b6c7b8265fc5b1c3adab777753e71b520c0. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:28:35Z), 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/USCNP1103202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4768c2696536e7e72bfbeb1fef2e29394f03a20fdd6ebe66a4528823b69610. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DEA711500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2baff3074a49506e6b456728554f726ad3858a9c51e191b9e6aa42255678bb75. 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/DEA711500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe471c8bca7ee827795d2438ccef73b384600fbe2a43eb0a41dbee5b3a870a980. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/DEA710715710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67e1e81071807f4a5152d9b4309f124a90786fd2822ebce00b4de96d72cf882. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEA712300007.