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 0x6ecce3ae727e956008239bb752f29ebe002eafb9e9c2b35d987f2e90b710aeee. 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/b6bba481-4958-4faf-9db9-36d7da8994e0.json and https://artists.proofprofile.net/proofs/artist/b6bba481-4958-4faf-9db9-36d7da8994e0.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 0x50efaff3da4bdb50dabc47389eed04546691b22e3f891b2a15802a67d09dcc8a. 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/USBB40580655.
Victory (feat. The Notorious B.I.G. & Busta Rhymes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8890bec8819f9e3b929ed1cb5ba5995bf41a248bfc24af8d09b3915329341f5d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USBB40580657.
Been Around the World (feat. The Notorious B.I.G. & Mase)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0c155f5bb32289adb912e5db493572e92fecf685ac77b3f8d5e35589b6b055. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USBB40580659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c36125bb2e5d35bea49192a796eb1bb10c2022114d3be91effdda626f413edf. 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/USBB40580661.
Don't Stop What You're Doing (feat. Lil' Kim)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5274af4ba8b79707fe3c3426d75d1bd365436d79a5e1a35bc77f9821014e2394. 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/USBB40580663.
If I Should Die Tonight (Interlude) [feat. Carl Thomas]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e7b82690c05951313a1fa2995faae38df8114fff3ee0a1a4cf383aa5cbf617. 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/USBB40580665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73605d6cfd59416e0b812b0db78859f95e331a361044305e723ec405411f0da. 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/USBB40580667.
Young G's (feat. The Notorious B.I.G. & Jay-Z)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe839bdc6d6480cb18809d3064bd604604c331192e2a407a926de9ff0cd592117. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USBB40580669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82331b4310813cce982ae2dda1e71c0c6f84aed0a1b6c094b35d4208a4444374. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USBB40580671.
It's All About the Benjamins (feat. The Notorious B.I.G., Lil' Kim & The Lox) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff7bdcc6050908e669431dc90732beecaddae9ff2704cd7a2cecb33c4b5c613. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USBB40580673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5710598ac6195718c1cbc41417d8ff96a7eb558dca2765f97fa47a30031fa998. 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/USBB40580675.
Is This the End? (feat. Ginuwine, Twista & Carl Thomas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf840c0572a39ccb77e2faff1c7cf3ebbc2189e9aa20426ed2389899663dcd30a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USBB40580677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd960a21c990b1aff487f503854636a11121fc8007b4d17d2d01188518b5f79e. 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/USBB40580679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d649a096eed716d3b55f00da77bb6e003a7366d68d5dfc29c606861174524fe. 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/USBB40580681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cac4645aafc28d4b059f0e1d0e64133e8fbfc9889cb53291a36db068c69cc7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USBB40580683.
I'll Be Missing You (feat. Faith Evans & 112)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7174ecf18982f92dcb47877fc609d73fd162a48bd84bec13156813428fd325. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USBB40580685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364fd9886684c5bd83e32d07c2c4bc62e2491a9dad30f2d2aa7126d0ab424edd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USBB40580687.