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 0xb2ddafd89c8c07b8121043d752e0b09dfb30432c54c6d6b3bc7698eaedf1db27. 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/c3c2335c-d28e-4ccf-8542-1b47c4a22ab6.json and https://artists.proofprofile.net/proofs/artist/c3c2335c-d28e-4ccf-8542-1b47c4a22ab6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
I Wanna Hold You - Sample Rippers Remix Edit
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 0xd706fa22493d5cbe2def2cbf8bc6ad2cf53cb17945c8b9bb22d8aa56e39ee9df. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DET190700836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e672f341a76d68fcb2a9328ee8ea8cbaea97c8b5602e5d635b113cbb26de46. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/DEGP20600359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82063541ab82f3c73270a2b665e0e3c0b555a3c9440fb36e7137e3622fe5359c. 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/DEGP21200524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e320d155ec5ff8a7a64d8859d1437d47800cd02b4632c9727b0952e3b3be76. 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/DEGP21200525.
All Night Long - Andrew Spencer Remix Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ec55321093279bd3256c8408ca29c6ba7960ae2b5b892d0682cb331343c841. 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/DEGP21200526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf5b2b0f606d37edbb344d53d9f9084eb5195516d9743abd135be9b02d3cc92. 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/DEGP21200527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47c315c799353baa14e8eadf4ac7c3efdfc20c751a4e17868547bc113f9e981. 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/DEGP21200528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edce76d535d02b883d89a6df8be26f1c5bf9bb7572b28f6ff47fd18cdb02877. 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/DEGP21200531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e503e39c6252b16a9aef1fd27789d4cb8a750df79c39fb4c8d712756d296665. 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/DEGP21200574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc5a80877f50be052764747724394f75cb06445871be4335b910132e4c3e97a. 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/DEGP21200575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb989badd0d8668066f823d6d8fe358666fd0da4aafe8a2272951d0b1673ade9a. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/DEGP21300627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6d1357fddc8caac5c188c4905bf707aa956d0cd0f8eba7179ae754707b36ce. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/DEMA61500440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040010a16a87ef82edbf9204502bd17f6aa34eff8fa44cce1d105bd7edd335ed. 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/DEMA61500441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648b0dc36a650a248b50b484ed059b011e4e9cac5c92cbe0f2d6250e56f42b34. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/DEMA61501091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304184cf87ac0f55393214cacf1e0b8317bb1435a2021732107e81879f47101f. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEMA61501090.