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 0x73253d335a433490f27fbd47647a4608e3d161c00c4d3b16ae2c4099556cd30e. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2fdf6be-2aa6-4f85-b4e7-311c0057bc17.json and https://artists.proofprofile.net/proofs/artist/a2fdf6be-2aa6-4f85-b4e7-311c0057bc17.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 0xc5d8c02e70bec588ee765cda1edcf083bda0d44772a9c0c990c7da753b46296c. 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/USANG2288295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc609570e4f2b5b12f5bdbcaa8a4557252070ea97ccb9071aa933e9a6d0d60167. 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/USANG2288299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fefc77933902d300b95acfa2b1efd23e55118610a0ba728df667b368a93304. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USANG2288303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060fb4bad76ecb0f565c5e30a6eb04e01ffd400e2ba707eea355f6f1acf7a09e. 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/USANG2288304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67225fb9af1c6a252955a018f3d972b7aefc59816c2c7340914a2796de5d93c1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USANG2288305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb66f37ad9abf8f39766406b6f9d9e7146f25d82222658ece53905614cbfd94. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:30:15Z), 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/QM3DF2216740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7c79f16d0682c89ffb7f2160bf069e44bdff152568769b8535b0f1fc4fced2. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:35:22Z), 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/QM3DF2216747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff032580a3943832d4b2336a892a607521032857db2bfeb3f8a905ea0eb8ec01. 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/QM3DF2477416.