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 0x38dd6e9d9f899515d02e21e5214181900a5c74c5b79496979c5a0bbf494c00ab. Chain 2 (Bitcoin): anchored in block 953599 (2026-06-14T06:43:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0cddaa12-7723-402b-b41f-126806f3026b.json and https://artists.proofprofile.net/proofs/artist/0cddaa12-7723-402b-b41f-126806f3026b.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 0xce40166c937fcda19ffedb0c41d8d37ed1d0d53cee605a74489467ad009c8429. 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/USUYG1314329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ac6a2602dceb125959ef7c0d0c3d7adc1071420ea248265cebf6939548de8f. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:22:15Z), 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/USUYG1411110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb2641dbe60ee41403576bd13f22851140a662f64a89773b65e3769544d2de4. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USUYG1474961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e22c368d7a838cc059888435679b33ba0f75d4e51a73ddc5cbb4114d1f9f20. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:08:46Z), 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/QM6P42393652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf82a85cdc6c1089247e864a45ad31836a01c43a77c813acee2e78203d646ff5. 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/USUYG1528070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e55ede9f1aa42fea2c76e001311c366d22bd4e433d5b7fe990d4a96d13424e. 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/USUYG1570026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982bf20eb8f03d5f105112980d7b17cdf68785c9a718b3b01619ad186d3bf306. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USUYG1580005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7126eb52901aaf9525133c7b7dc9baae0e4afba838bf99c57dad3b4d23af9c59. 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/QM6P42565253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207005c5a570dce3439baf1600baec93d9c97d602549382d32d989d8d1833b69. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6P42565251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad66bf49e0ec5c4422cf13df198953be536865d592191e817840776e7436dca. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QM6P42565249.