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 0x64e237eaeef4f44867e1dd090ed0c59a6bf329cd2d85ce82bbc5978080a41fde. 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/5ef97555-3380-4534-a27f-87c082762cae.json and https://artists.proofprofile.net/proofs/artist/5ef97555-3380-4534-a27f-87c082762cae.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Twinkle, Twinkle Little Star (Instrumental)
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 0xdb36fdfc0f984295108e544e0533aff05cf01150034ced897a6db93e02e9aa5a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEFN82004068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2551590de6ef45008ddf7b76295e8defa0ff8e92556915862412b56489b8175. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEFN82004026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500ce49f7f696284e7df10179253d9d9b1d51d05af4021a921f4b74a220a7eaf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEFN82004060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f469548fa5296690da13da5f7ed5ea7bdbc97120f364de9fa93dd3f4166bbf. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEFN82004076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef1edd30334d3e8aebdd31ad3182aa80db9700a59aeba018a06b2b2c6132bc3. 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/DEFN82004012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3122708718b7d15b24536bf56df329d330dd3d7fd3d0fefccfcf07add47943c. 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/DEFN82004002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfff508f9ff9abc933a1a343e7f81a6d83c7fa676d3a89e38c28d10e1664a24. 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/DEFN82004004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948387ba891e1d2eb0b08ce113f3a2a734b58c6972572fb3f145000fb664bbaa. 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/DEFN82004003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9213b94280eed630032d387a197c36ac9fcf0ba697e6123e37fd1398638ad76. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEZC62194642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9e4548512af27db14d1e9821f3d748df9f822d1813159953671910932262a4. 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/DEZC62194643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642aa987465bf159f5675ce2b0f43be629493ce5a946baa92cf8e6d3e32bb5ea. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEZC62194645.
Funkel, funkel kleiner Stern (Humming Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab096ab3b7d86e100052330b2c8a9955da4604e7120249d312b76e79cdf19b2f. 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/DEFN82004070.
Schlaf, Kindlein, schlaf (Humming Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196cb110ae9d038a59e0edad8d9a7472482bfa00b93828d004b46f49b0c8175f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEFN82004051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa2923b7078357480b77f737aea2e9d6d628273960ec8375fb976a8b7de1c88. 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/DEFN82004028.
My Bonnie Lies Over The Ocean (Humming Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a7f55e9dafa88783d33acdff0bb3f0f28b94e41de0cba26698b85477ed1a14. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEFN82004033.