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 0x0e8a423d200d0247853dea02bdf01b473abba934b84b6a1adfe306d9593da336. 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/0bba58ad-2acb-4a7e-bfe7-fe8d09fd5028.json and https://artists.proofprofile.net/proofs/artist/0bba58ad-2acb-4a7e-bfe7-fe8d09fd5028.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 0x16dbb129579cdc754862c3cf25d308ca13df7df75e67f0cba65f6562e87600e3. 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/TCJPU2394204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb53a029c1717b09b9c78f28d3e3b9bd726841e90a566742a6e7144d0cdd814b. 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/JPWP02400316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0d4128a2958508efe33af6d420150da22e499a1e91b2ce9dec9210635b186d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPWP02471041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fcfc1760e0f836d387ce26804918f920beb4c28df4345b0403002a52dc3531. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/JPWP02471043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b523833ffe45a0837a5f35bf8b29b384e45de7054cc5dc2ceca5179e663b4b8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:11:23Z), 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/JPWP02471044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0c089bfa1e1bb2eb41c3e42be3ebbafc9ab9dddeabf4034927456355b999f7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:25:44Z), 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/JPWP02471045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d6e18aad8bdbf961979f39a1e1fc8972d06552556d9cf702fef74b7f7c74f2. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/JPWP02471046.