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 0x4d242f6d99d557924cbb68f578d53bb26196a4a51cf36f8d5e2ddc012c255d23. 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/af165eb1-6abe-4f9b-bfb0-ff3a5b4bfba1.json and https://artists.proofprofile.net/proofs/artist/af165eb1-6abe-4f9b-bfb0-ff3a5b4bfba1.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 0x9d7ac636c96ea128c7b5ccf2ef9f9d8f82135c1f486cd555f793cbaf3731a9d3. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/USHM81028487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f9e3f4e295c6d3fdd1152878d56b92f17d6944dfc7215314930b3b98f965e1. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USHM81028490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcb6af5da866bc30009eb35d28c9f94554dad8536bc70de13df5069fc1e97d0. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USHM81028494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b569bdeb6425f83b803bd7b94e2bc278488feeb982967dfc3306df836deed0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USHM81028499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bccfa1bc070dd302f5f2ad3a263bbcf7c3b212a09cc1d18f0105870b651fdf. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/USHM81028502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f9dcd59290fd4829fc03f2095d7999ed3007b8a124c95c5dc8a3637f56760c. 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/USHTA1100094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed62a1caafec800cc5091430390d74f4cd7441e6f7037fdc0df72944a4961a6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHTA1100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d736c8d696a5e371a0b3489aba9fbc08c5a36464c153fb67099a0e8b4f25566. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/USHTA1100107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa9b69c14ee11f81292e0096bf61637f7ab9aa10924657df5e8709e8e491ac8. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/USHTA1100108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d6b5f36b62859cad9bf6668cc380f1a00df6d382d0196cab98a0e5c89bdc2b. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USHTA1600419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cd938889ca61d1def75118eae790d3dfd7cfd8c95c87d18f77912037638c39. 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/USHTA1600422.
International You Day: A Tribute to Tony Sly
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac28f70d56912d739c72f91baa3bc77e3bc3c9a6d2e34fabcc2811344e2bfe64. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/USHTA1700469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdac64be2d57376ddcc255325a7618d3ff8d8c0efc6bfe610a152d55e23a1ecf. 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/USHTA1700497.
Murphy's Law (Remastered) [Deluxe Edition]
A Tribute to Blink 182: Fund Music, Fight Cancer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbf75b0679fcdd73b4477bdc8a307e3e1448a35561594e97d3a62cb50795c13. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USHTA2300688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024983fc4d072667e4d0b8b5fc5c9c842d09d5011152d924feff78d476d5445a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USHTA1100087.
A Tribute to Blink-182, Pt. 2: Fund Music, Fight Cancer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69cf0eb5bcad904eece23e298e1ea408989db439db3c8e18dd96ec56d482ef4. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USHTA2400715.