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 0x7157d34bb28ced5cc42d5574b9ee860c9e78984f500a0f72110009bbb0160ae3. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69a42ef0-ed3e-48f9-a7fa-36e9d112ef0a.json and https://artists.proofprofile.net/proofs/artist/69a42ef0-ed3e-48f9-a7fa-36e9d112ef0a.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 0x5339540b048897f11914a0c253c5b45d4b4c027d0ebc1306e135278d62dd46b2. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USP5V2200072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba001c81d58028edb8d9838c05072b8e163de7b11da9aa58e0f99601d14f431f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USP5V2200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955dee1e62cf0d1a60139a7ae60533664fb52a42541ac6ad4548f571a476b666. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:49:04Z), 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/USP5V2200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef90cb0510917a79649a4265c3ea69e00e3a304d355b868be960b8db790d3fb. 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/USP5V2200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c3498f0b023349a5427f4f1b38beab925348d8de5f653e1422d3df14cfe378. 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/USP5V2200077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76285feb462cfb1efd2d36eac7b5e8be9f1cb11ab8e2e890c66e150ee9cc6ea3. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USP5V2200078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196243c347f41d7b83a54a5bb1d7ff306b5522b7991f82d3649d32634a653e62. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USP5V2200079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5148094dedf2c12d74f2c183556a32f765760f3ce8c6adf5e31b46afeceb00f. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:08:04Z), 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/QZ6UC2500001.