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 0xce63a82b5b5d8dea566795fda40e444a22e9416e31a943626bd596c4f849b3a3. 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/e071a2c6-2a1a-45e3-bfba-6002b6aacf2b.json and https://artists.proofprofile.net/proofs/artist/e071a2c6-2a1a-45e3-bfba-6002b6aacf2b.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 0x41d1a7f5f35e48df129bf1e28a2687819f8e7977771b0975037a52bdc9ce1390. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:43:13Z), 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/RUB521221379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb68046c2d5f1b4bd7bf4702e630d97bf1dfb198469c5db0aa3f891d4d2b09d5. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:28:52Z), 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/RUB522300241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2389e187df75c740739aee050b180b32927cec492440d850019547bd093ad76. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FR96X2422443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc043e82ec9d164f19ade85fe444b46e1b20b1dec6e49f85050a4d2c076852258. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:02:06Z), 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/DGA062495863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ac7e217fe54b78860bda7eaaff06b7b234944c63b9687fdba519929d35b0a5. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DGA092467782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2d7931ce1d20d0876cb5cc53962f9a329d598aa11fd572b86a41fe1718772c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DGA0Q2454484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe741e11c05204b0bc50359d00ba94b6a37aa9f522a92244b5e7e3acd0a41830. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FRX282572727.