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 0xf1d99ca3492c3edecfcd86209a3951bde67da467f05071dc2de8362243529639. 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/df9f15a8-4735-4593-bf96-46fca26e9403.json and https://artists.proofprofile.net/proofs/artist/df9f15a8-4735-4593-bf96-46fca26e9403.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Do You Know the Muffin Man? - Rubber Chicken Version
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 0xed75072e6e974858d164e2f64b98117b29e93230239d006566ae4fadfff8b279. 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/GX5MY2325161.
On Top of Old Smoky - Rubber Chicken Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083f9bc901609e85ef5e271e5eddbd96c76a833a83a77d26d8d19f70514872e3. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/GX5MY2350704.
Old MacDonald Had a Farm - Squeaky Toy Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acbc8453892ed90f937c48d6c6d82c8e2ab2e1e46df7a5f6b7c9b9c9c02b374. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/GX5MY2380913.
The Blue Danube - Rubber Chicken Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc5b7230d3809103365839af0ce175fe8ff2e4716b1cabbfd8f876637f41fbd. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GX89G2423552.
Nursery Rhymes on Toy Keyboard and Recorder
Pokémon Video Game Music on Flute, Kazoo, Bike Horn, Rubber Chicken and More
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7038c452452debb49e91b5bb50ade021404445dea8510b251e84817c7491dd07. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/GX3HH2415477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55a925576da8b5b16df79ed32e7654e6ef3a63fa4d38bd0199ad7c47beffd69. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX5MX2404776.
Santa Claus is Comin' to Town (Rubber Chicken & Bike Horn Versions)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d50ae878469ded0699e02360db1599b8321ae297842c02dcb30e2985e1a24a. 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/GX5MY2464041.
Super Mario Bros. Theme Music - Kazoo Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd73a0ac731747ac22eb2fbd095bc661bc9df60198155d05330e1b01033cf93f. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GX8KD2524587.