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 0x7ce97e8a0a81d6137e921d4ee0531addf0f5402c954797e72fc394263d1f8a33. 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/ae0caf05-6c0b-4ee4-a1db-42bfe8949347.json and https://artists.proofprofile.net/proofs/artist/ae0caf05-6c0b-4ee4-a1db-42bfe8949347.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 0x806b2d93f981acab1c4821060f7a7023d1068e248949d4571e451cd0acdbbeb8. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/USHM82443266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06b85e5baff59abd40717fa515be3bda0ee5439de65b80e350d459462faadd6. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USHM82443267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23bafbf4cc274e063f9460354fa2251c5d0c95f5ba7aa5e54ed6d143e82d8af5. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T07:36:28Z), 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/USHM82443268.
You're 30 Years Old, You Don't Need a Song (Interlude)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec72e84729428cd80f02099d5b8f56d1be5ddd1120c564cc7fe70e82a0abcbca. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USHM82443272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7f7c712155d1e87023024a9b92555a6e302fc3f6597cf346c6550f8a663f9e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM82443274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b14616af291531a9578e213e217b12b7710a04dd89af0dd795da55111a46d81. 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/USHM82443276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dd41ad99d759646076c0f13f191e0d9070999cdc3d7796543fa9d66b0ed37d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USL4R2474026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103b9cd730336af46c31a7a7334a902034b19053c93174df44914526b09cea35. 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/USHM82546411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a01be79e44822591832db7fc3fc78363a611d4ef438f520eb201e9baaf2011. 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/USHM82546412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152835f8a6941bc93fc200eaebf4c36c4e25387efce9eac889ba6f4c2797adb5. 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/USHM82546414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e586bcfbaf56f6f5212242944361ba6c7edbb4f0eba62d06a565ffd521a79dd. 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/USHM82546415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe314f02de717a850686e408a4683e091da36f4e24a88755f7d3d155feba5c813. 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/USHM82546416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea53321cbfd0d9c55ba24e9b0d83ffab633fe2f4c67f3ee330df0cd79e32055. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/USHM82546417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeafeab8591941da26fa571a2c8ab4b2b3f38b163a9a1f47f6ba5f51cc83a6a4. 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/USHM82546418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c1fdf192f123fbcde47ee98598a6b29feb7db39190360b9810f6653c52e6b6. 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/USHM82546419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4130d8b67fe251d8e72610e09c42f0a3d33400d1bacdff58baa2671c6567909a. 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/USHM82546421.