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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14f81793603593d5f0b623a74761ce7113f31996504934b6a812a81c2e163a1. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5702a52-a17c-44bc-9fe3-84b345e04a32.json and https://artists.proofprofile.net/proofs/artist/a5702a52-a17c-44bc-9fe3-84b345e04a32.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cole Porter: It's Alright With Me (From "Can-Can")
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a1a91ad5b2688c7133d7dabc78974064e0332b2bd3f80b6928421e5177f155. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAYC1402314.
Let’s Face the Music and Dance (Foxtrot)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56ff96edf08c50a2cb8be12fbf2104e302944807466b118037e76e5b520474c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/UK5BH1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aacfe05e4297dc426a5b26145a15b0551f6b659bad0cebae4a3c41ec1b9b089. 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/UK5BH1700023.
Loewe, Frederick: The Heather on the Hill (from the 1954 Vincente Minnelli's Film "Brigadoon")
That's Entertainment: A Celebration of the MGM Film Musical
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59196f69dcd2f8f0cdc654c48850c0e2377439fc4cc92a6cb9a4df399355536d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAYC1102345.
Cole Porter: Stereophonic Sound (From "Silk Stockings")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8964b8724e213003a83c51a6b27500661811925637a3428a5199fa1ba1ab5a. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/GBAYC1402303.
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
Cole Porter: From This Moment On (From "Out Of This World")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b6017c0d828aef790d8b495f89b72e34ede7559f2ee70f36425ee925f06947. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/GBAYC1402306.
Cole Porter: Easy To Love (From "Born To Dance")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8937c222dbbbb1030eb77453e030740965e925ee74ea9d6e350b639922bf1d. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBAYC1402309.
Cole Porter: Who Wants To Be A Millionaire? (From "High Society")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf4d98089e0af0b1b29a95491944441ce7692b4a5c0285b75fe70e8304d6a20. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBAYC1402312.
Cole Porter: Les Girls (From "Les Girls")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650cb90df3ed0588e45bd8d3c2f3b5534c1ff9c6e11f9d6db7887b2eaa26f1ac. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBAYC1402316.
Cole Porter: Now You Has Jazz (From "High Society")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bb8210c172011ffc24c002bac6954d583170d700c812dff8edd1d52219dfc3. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBAYC1402317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cf666c12a9e2346a72c1aa07ebb398e2bba4cf67a5224dc3a6d46d928091fd. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/UK5BH1700012.
Loewe, Frederick: Gigi (from the 1958 Vincente Minnelli's Film "Gigi")
The John Wilson Orchestra at the Movies - The Bonus Tracks
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9c5960047f9e9cea71893979f63f59cb0fb2b3f460634538532899beaa44f0. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/GBAYC1102365.