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 0xc3185dc17ca82dde2b0a5cc936eded467a8e770ee673414833ba2bd74ce22b29. 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/ce37eeeb-ddcf-41a2-ba79-f898bd8d39c0.json and https://artists.proofprofile.net/proofs/artist/ce37eeeb-ddcf-41a2-ba79-f898bd8d39c0.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 0x073aa804d81f39d7b11d79b8404b28950fbdafc0d5670f8c2b5e9fbcaffe2bed. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/US83Z2496687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa11084a05055d3a467f3e8b46e27f05c1ac99a43860b5ba950b3ed290a1211. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US83Z2475087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ea664bbfc7211bea065ecd856ef8cc3fcbfa7096a104c48bb9f3c6d2a2853d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/US83Z2473666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d75a12d358744ad5959dae4ad8c424cc499217784af5d8d6d354d048d938986. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/US83Z2353602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829344c4fbb7020a581996fe61668ae33d762298b01d87c7f047f439afadcf97. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US83Z2353600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f6ce1511abba8789fe5a9117ab748068b2bf90a2e408c3c2f41909ed2e63b4. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/US83Z2353603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3a83adc56732ee75f26142ec19b6acb3ae2e138528756c014b48d3abc82d4e. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/US83Z2353601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1720039ae9b18388fd93531e12b57e691fa56a17d3b34b471b55880d463fa4c2. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/US83Z2348090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0486279e27c6e36fabdbbf266a6e02853f54b08eb0bb1ead8090d3a8cdb2d98d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/US83Z2204158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb667191a0dcec98a304734c12c32ab3181f3e383231ff6dc1684c7725d26df. 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/US83Z2506051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c69e973913bbb432f5c29ed5dfce839203a7114ccb958afc79fc5ec1a2db98. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/US83Z2506052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa757a7caf7c14af1fd236216e22f05b7e84df44c067605313e0ae7033b4477d3. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/US83Z2506053.
When Did You Come - Agustin Pengov Reinterpretation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1dc51e8d94eb1531db3d59ecd6c8696c4361cf1c2c490f0f7fc5f99f4ee256. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/US83Z2506054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eac06f6b7466105ccac994258185b61a745014f3220f9167eb7255efe794154. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/NLHR22401194.
Castle Bravo (SisterSweet & Yonsh Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f83932b270c01a5d7da6bfb64f5ffd8bac9b69f64df41ebd9d52a26a3eab7e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/US83Z2471165.