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 0xecdb371d15d664529a646b4c70c008a79488014f36d86a7b3d1787ea8388c662. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b3eb856d-3ae7-4746-b190-a28a990e2eab.json and https://artists.proofprofile.net/proofs/artist/b3eb856d-3ae7-4746-b190-a28a990e2eab.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 0x63853810fd472fd7216058a98a435ecb94c906205d7ddd83939f6ea47e1de80c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TWU712300350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ec10ba3f8e29f2d23345c3c11975b0ae0a074be03ecc14ed0e56395d98a8be. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TWU712300351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f7f5e100c457a0465d22da735e284594f1372353f21a7c450b17104e755d16. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWU712300355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4a92fe8f4c1926881a7ddf39050011cee31a34b8d7d284c844cc8f66481a0c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TWU712300357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe255e7d2d875f4f79e22b0610cec18ce81331c560722ad88c51c84405d9f0692. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWU712300352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9325d1ba39f4deb443dc4e4b24677d8adfd46257d036582b3405a69334f3da35. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWU712300349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0078cc98974102b992ca9ba54b9395aed84c9ae78cfd2da972d3efd820fe630a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TWU712300353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3d52a6872d34c2dd9a99d8d7642e369c0954703cc766aee6f637d5b03af538. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:52:37Z), 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/TWU712300358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8262880ca39a3edd04d32396af5009eecd6c9659195fdbc9590d53d6e65ed3fb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWU712300354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc244c5f6b6227430d5004d5ed7c0b3663fb376f2fcb6d8d44d4fa459025827. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWU712300356.