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 0xf9b09d26144f7aaad57b62a45e5c8e16cf6ea2b1a0649484aac9d15e67a4d3c2. 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/ff50ab64-2a3f-451b-92a8-fdbd73417558.json and https://artists.proofprofile.net/proofs/artist/ff50ab64-2a3f-451b-92a8-fdbd73417558.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 0x9511325bfc27227b3c62cf02e39377fc342838c5f6f055d0f0c9de389fb3a0fc. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/GX3Q92045338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fe1a8a52822b5019311aaf7234e9d93d643bd8d4e91d5de3278e6de00a97e3. 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/QZDA62311496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9223f7f9d7fd47bafcef8acdef08a1a9e7fbaee7073f6fcc9d70349bca30495f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZDA62360704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b58d04036c0b541245bf995ea7eeee180ced5170525bb7af000a8c0c22107d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZHN52201968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d4702e1f0a90e948b74957555f299515d064c7cd5755b2838ad561a24295de. Chain 2 (Bitcoin): anchored in block 957634 (2026-07-12T00:26:43Z), 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/QMDA62443185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcbb4bf503c3d61963b6f4066c0dcb33e15bbc18da6a7b8b0f982545ab4b617. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QM4TX2516060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fa528d995f41c91bd55301bd6681daca9bfc07bd5910ab859cd9d1f41f523b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:49:17Z), 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/QMDA62443189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f90974bcec205c1a165f940f616604460fcc8c7242fa6e9fffb965c5f224827. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QM4TX2543461.
Després D'un Temps de Bona Relació, un Dia Vaig Anar a Sa Casa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59aae54ee44e3032fa3905b40f86a8cac4c786b8554fa9223b61518321d5265. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5062200302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfeb57b876f15573d5e3c27a5630efb03329876208c1e2cc426894b8a0a9d3f0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR2X42226358.