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 0xbbe5a568c4596844b34e03980e0a12934ef7f2dcf1fecbf8818d4a897551dd28. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1b26469-c16a-4168-a0d3-ef1e9be63597.json and https://artists.proofprofile.net/proofs/artist/d1b26469-c16a-4168-a0d3-ef1e9be63597.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 0x656e0ea5eb3ef44597ca5c5f8e92fe461180bbbe2893f4fa8da4d574fc5a4159. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QM6MZ2312401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644df1c0b765286249e984248ed11856f977acbbcfa86b60480df6453a95fa6b. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QM6MZ2312402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6119d263873b4b683bc69a394de36f41b2bf09c44d3486ed9e1f3f43b637c8ec. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QM6MZ2312403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfaf8b988e104e425dd201548e39c7a2f6cdb9f0f72c73e9f2cf89f2b54683df. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QM6MZ2312404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2df0b18de488a34245f89a7fc637474e0157eb9a8cbf501cb22435d7161bb1. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QM6MZ2312405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324dfc0f85d7771ac0bf775cdd056232619acfa47be247510dee56324ec0c37f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM6MZ2312409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d0a1c1db0bdf747631dc144868a5715167c4ffc3678934193cd34750db2c28. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QM6MZ2312411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046c2f31f6f87d8a445d24dc297b9f13a4a48c47133808c2c75c5787253cd076. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM6MZ2312415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40da5237c8a0080e413e55e5cb08cd2b956428d2ae723d62def575f73ecc382. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/NOFVV1619010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a6f0b7519ceea6367081e25a6c5e357fa3da15aa1f9922f55eaa0d33a1c7a2. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/NOFVV1619020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a74b5ba1154ea2a62ac1ad685fe0ad8bf2494e9874769cfc4bd71fd00bc276. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SEYOK1533830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade36e5f52f714ceb38d8a27a1844730ab71caf4d9c1adb86cbae711e1f0c530. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/SEYOK1533833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291e1138e49fd30e1fcdc516efef4fef2be6a2fb85c1d993c3b03d66ccf94c60. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/SEYOK1533836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c7e6a87ac4a3db171cadc60e2506134a0ee9fb4cd7067939325cf9c3622f9d. 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/SEYOK1533839.
Deaf Before Compromise...A Volumen Brutale Tribute to Backstreet Girls
Monster Bak I Flaket/Monster in My Cadillac
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0045570bb06525dab52b1b81cd0c725ea3ee7b44b77e868e9de6242f7782972b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NOFVV1503040.