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 0xd56417fa5bcc34123ad5d85df469bc61804bc88e5f3b62b1367dea4e41e1d39d. 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/ebca14cc-1f1a-4f76-8ac4-ed6758096973.json and https://artists.proofprofile.net/proofs/artist/ebca14cc-1f1a-4f76-8ac4-ed6758096973.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Let the Blind Lead Those Who Can See But Cannot Feel
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 0x0cf4f395173aafdcfec3683a8b5b9b7dc0bd5b01ea0d6c69c340804cd99a0968. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USI4R0705668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719d260fef0bd914e6faafeef186dfa2e7230f6bf69b5c3deb61eacf38f767c3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USI4R0705669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b421dabdd910513eb5f86ea20b45a81b0250a0ed065d19a7b47ddd7ac4be2f. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USI4R0705671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70b6bdf0da9622c669dfc555a1992c5f822caba3f1f2daea9fb9aacdb58a291. 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/USI4R0705672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7aedaaefbaae1b30688eee4424254719bd0593658c5f739afd6dbf689f2cfc1. 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/USI4R0705675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0f09238b9ce5c43337a03c0915ef5acb4ffc4ad68e46587c1633870fe19119. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USI4R0705677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e969d0e226108af728e1d57bbd22c84243eb599d0fa1ee849d5398b5cb0218. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USI4R0705678.
Let The Blind Lead Those Who Can See But Cannot Feel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b96d4695840d14349212f649db334c324442317bc8c9d5a7736f09a22d825e. 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/GBAFL1100215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4c51e76a7073884be80a55b7cfc328561d78d5cf29f8dc1a92773dbbaa307f. 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/GBAFL1100216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cb2510ceb731dd96c9b0b9fe92a7c06a9db108a730d77c5fa41aa346dc54f3. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/GBAFL1100218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29367f56de646e1c2d6d53f6c75a0a42b1b1f4057f3b6a7d9e99e89d5649e646. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GBAFL1100219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22aa804f079c42290d068bde404df93cabe1c19d8895f984016603fa636de8b. 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/GBAFL1100220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b30d32501e0244667506b97565b4a899be9dc4b544191f767e89a12358bfbe. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GBAFL1100221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafdd27ac1bc523b83a25d8d3c49dfa239b719abc5dd17f58de2fecccd0ea54f. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/GBAFL1100222.
Knife - Cover Version - Original by Grizzly Bear
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad9ee76d9765ac9d25238a61642a112ddd5ce95d658f2467c4e6b122536e414. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GBBPW0700169.
For the Birds: The Birdsong Project, Vol. III
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe95659be0ae68091b952be74db07b2268d3097b5b47721ac6886924fde1e042. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QM6N22234672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5e01c17065bff4e424834e350da8c187bde1be7aa893e4ea536356c00dfa0a. 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/DEU671101938.