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 0xcc52ffd4d9faac4293cf6c14e15aafd9632f2fb749d8edf24eb78e04d160a56d. 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/9fabc777-7c0c-4eb2-9f06-a7d8350b6a72.json and https://artists.proofprofile.net/proofs/artist/9fabc777-7c0c-4eb2-9f06-a7d8350b6a72.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 0x19d4202d5fedead3adb8950aa53d8981134268b4df87f7880cfed4b9590b095c. 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/FRX202167137.
Whistle (My Nu Leng 'A Little Darker' Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff0c441d45fc1afb3545c1d7c85dc7838f13ca29aeb9d5383e4ff8b320a8d06. 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/DGA082377560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d25a0875fe50234ae86ea0a63f51165f64a142c1c95ea3e9323b9e8a981097. 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/FR2X42354440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea972c17c9c3d378720de643c412031805811aa4386413d614b6b09539eb767a. 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/FR10S2369602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c40fffdbae2d46907b330d68bc4dd29d210fd99b9cd2ec45cdc34806149e13. 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/GBKQU2312989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57065b39780f330ac355ec9aff200c5fdf8561a8a897c21d29758a44aa62b948. 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/FRX282259831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8881b2b788e8af788a62a360d2a06946f239941bf20ca9b5487e21250758091. 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/FR96X2294464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78e9e631623e76e7489caf195c900bfe181042319345a3b39cf6aac73839f04. 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/FRX202086589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1d2a62a527e8a7ffe19fa25aea14480cf3c9afc60b1eb98ce562aa2fe8d1ec. 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/CYA112000084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd1e710a5112e992ef9d56ed49029200d877e4dd3c5ef7e87e90a2ec8804c75. 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/GB8KE1859083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c2f7cc587000c4a07c5a14f2fbd1a0cc2f080d7010f8cd30e68bd0717159a5. 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/FR10S1901500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84332de03597b76f987613c27c22d4c41589af4f2e5243466092e6afab7ca4f1. 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/GBPWR1600581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09566a5b5a64bdb5cfc62c460bda53afeffc3457a9b004be1ef861c645361f24. 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/UKK762210006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd989f1c377cc0a24f1258a717e676a986a1081d1ca427571a16267a8a1ebbb34. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/UKK762150006.