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 0xe673cd624d406e7acd43cbca7b814be3cc23a1fde765bc4f7a7a55d705f37b73. 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/946d9f9a-5039-431c-b91e-619698608ff0.json and https://artists.proofprofile.net/proofs/artist/946d9f9a-5039-431c-b91e-619698608ff0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Handwriting III: Whales Riding the Rain (an Old Table Reference)
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 0x6d78c06d0f39414f5469fb7f3d13c0e678cd0fd9f6ec7419c94ba6a4942699c1. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USA2P1679614.
Sitting on Top of the World (Rockers Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e717d90eeb00d54b5c6dc628500ac820ef0f4d696cd167bb7a5137385f5c3d2. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USA2B1801820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d54d730d4f56d1c0933d76949e287dc973c018f4c1619da52c895f48fef30c1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2B1801821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946074304c6238bb637f2c0596de5ec7942ed706f477e3a0fce98b9363f32843. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:11:09Z), 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/USA2B1801822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406baf36817427984cea8ca95af5e5c00351e9e539b492235ffa5cbfc0c287ee. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USA2B1801823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ff81b38c301dbec5c57fcb048ec437be7fbd20f00973da23894a0985344e31. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA2P1832722.