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 0x4ecbb14a7a23ec6455e47b0a32081e256e2c25a0880d5e10ace9db292706d5b1. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/08a4a13e-0f6c-447a-8791-bfad497d10cb.json and https://artists.proofprofile.net/proofs/artist/08a4a13e-0f6c-447a-8791-bfad497d10cb.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 0xeab77c4914078d2921075e84f9aabbe6e6f18414a6f9547ae3e71fc9d1bd9ac3. 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/QM2PV1517291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f15fee1ad9c876219bea9011305521647c1ac71582734a784b9eecfa7601f4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM2PV1517297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba0c8d4a82ceb39b3a0abdd27e7915cad5a7208319ee75e9ddd122d62c6bdca. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QM2PV1517299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101684f2e499b0f35fbf0677f84f00b6761dbeac830317e05d83f761a99c4a9c. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QM2PV1517300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527c78224cbc57a173c4a7bc853771075264aa555d25f9af9c044cd9bb17299d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM2PV1517301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab45756b73e051d5d71153f02b4d51d5a37688df0ea223a4b3e9290465297e1. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:57:27Z), 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/SE62M2313856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353ee662b3335bd519ec444b0b24f3ae1e1b3f01e789bede5aebc2a78c85d547. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:07:38Z), 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/SE6XY2369567.