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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acce2cdea292a06f0e9f2e60ed7bcb54766baf374395d0b6832459d0338c5f0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f6ca0c9-d932-4e4e-8d6f-09ceab809fe9.json and https://artists.proofprofile.net/proofs/artist/1f6ca0c9-d932-4e4e-8d6f-09ceab809fe9.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52aee9efcbe40ffa21b9941ca2aa445c0474f48c30b4041a3964f45fe061e7c. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QM24S1814886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58b4624cfe8d47a0c85baf4b8ab96b1dc6c57d4bd8831fbad535badd2d88056. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QM24S1814910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c2f3f550e6822bbec76a654dc197703f65c20ed8d28ff6bd933ec0007f2b49. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBKPL1804065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f07fa88c57ec772cbc8c4375ffb5e1c7032f95abed88b74384dea88bf1947ad. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/GBKPL1789766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51768d96299ba22a6e35783f414db638331832af03ae036f5f26f23478fa3dee. 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/GBKPL1782790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79edfcc579f9820ba3c5e2f960f1c74b22a7a00a841d37f46709ef4cd90b45b3. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/GBKPL1791632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9c5645c3b07dd4626c537b794859c23056a933507085b5c408225a71355298. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/GBKPL1786904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65e6cfc4ce0c64a7c19ef92f277e13038927d004e3ecc574d888042c7b48a04. 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/QM24S1845982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d6f3e3b849b334199e794967e7feaef72006ebc2fbad0e8f5f12280e73b873. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ72008354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849ba7e2ef005ae3c21d4fcdbc7655074e45e25f1f576613ad7b13b187d8189d. 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/QZFYX2071104.
Do You Think About Me? (Congratulationz Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955620ab707754dec78d5d547c0e99a63b20701c382a473313a4107c7457e15e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZ93L1962296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf933fb1c757b1467d10d5a2cccfd0e27ed57ef14d1df23d99f8967b20f3def4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWQ2068324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5089cf295ac3a8a9ba2aa6bd91c7e89016803e98a619b6bb8e106771b075f02d. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZHN42107185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81333f3054baba2bcec58dd41df46db8faad823c760ed33eefdfd16d96dafd67. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZHNA2182285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f5ed1abdae429124e43b0672ff53ca6a753f3b0bb084fa2a337402d5e3c6d6. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZK6F2284658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066cc0901bde8f2efa13494c913e113e6ec7b87be581906dbcfaaeef8ca1b72e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6G2075449.