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 0x1309446f5968c332579b702c7f8d3d8531397b61ca4a31454364fa3be0a80f3f. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78e85a68-165a-4791-b1f9-0411addabacc.json and https://artists.proofprofile.net/proofs/artist/78e85a68-165a-4791-b1f9-0411addabacc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Live @Cultuurhuis Heerlen (Live Version)
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 0x27c818b85077f8f2ba04bd1e9bc1af20bb93269e541bf51d9957e23d0fc53263. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QM3DF2408413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363c30b7aa8f36517c5a8b08ae65675425de83f37f0387f36d6e2e006673d17e. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QM3DF2413917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3136d899ff86f37ea12e46f1239697c4d5fd9b37997c1a608363bc8e9ea945. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/US3DF2501576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49af54bb6b059d414394b312e323cb559e5d6a2cac874b3f35aba56ab24bb57. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US3DF2501976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d1a749d9a72ec668f1643c0ddf5037e3ff41acc441fe21fe813260452e6f16. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:00:25Z), 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/US3DF2515010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b53125cebadf1028979ac7de50ae32f70b996c26f2ebaa348155cab1467fbb2. 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/US3DF2551558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf2d8d652da40dbb41e74a5e7833b3a9a3f639d7453732b77662f389dec5c3f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/US3DF2551557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5267bb7867cf8269902f21c1ef097dc9a1d1da82b6163ae0015d40a9aaaef922. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:44:41Z), 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/US3DF2551556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafa4f0ffff6e83c029fd4eebf1cd7cffce373ad580a201771a95936c1081a3d. 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/USANG2512126.