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 0x9419b91052c7af78fdea5b8283e17352d59b3797e1b99c9cfc9d5b21bd60a364. 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/e434d7b1-a460-49bb-80db-adecc28244ea.json and https://artists.proofprofile.net/proofs/artist/e434d7b1-a460-49bb-80db-adecc28244ea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Drinking to the Broken Hearts - Piano Version
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 0x680a26df18500050ef2f9c682f664f94673d39aa9ea22086962ef486e3ac6fc8. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/TCAFZ2238927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8f658cc4900989c5398f3f5cff72f6efd4c37ba5366df32467062bc6d56ced. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAGE2241046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0530d69f8736d76cc842e24bbc7f32168c177f67397248bf373cf9765a6a1cf. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAGT2364724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf560e789ea08cefaafa8846b88d3959c9d8006f9d34806110cfccc591f76e0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAGZ2340318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4b8d50d3078e4eb7fca94bf13ea20faefccf5b2128afcdeda7b1fa677f12d8. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/TCAHC2378322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae3d7d671fe8404c326a983651d4629f38ae562ef8d1260f01ebc8ca1d34363. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAHJ2313753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60f94962a9f5e45485e7079794e5dfcb88a95585a154b9f0a583daa6b3eb96b. 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/TCAHJ2313865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa687ce035d858ed6788b093b6fa2ab58acbb024408f24abdfcc455e6b60bb1d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAHJ2313877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cc40d208154362f4b6ca28b91f5599296b60fb5c9528bcc7ae563e159a3e08. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAHJ2313911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8370415dc1ed9d25dcad4cce7c13a5238749026be99b43c7ea7e3fa920a2e907. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAHJ2313966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4ecd3850968dc7704f97fa6ac16133c685f3ba19600fdff696e6dfd4ca2237. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAHJ2314029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f5f9cabc2532292c6e0f5b5061489ec1036f8a783626e987bfefbc965584b1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAIE2464306.
Lie About the Truth (feat. Maggie Baugh)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ada75aeb445f889ce0b0a7bc5f8f065022c4c4e67b10b37aace3f0422062f73. 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/QZUDS2300007.