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 0xffe0ee4b9c12d8211cd7fc6c4c9489f539963bd8eae7fc592eab1dc09271e812. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/921b7d80-be33-4512-a407-7423b21c9732.json and https://artists.proofprofile.net/proofs/artist/921b7d80-be33-4512-a407-7423b21c9732.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Childrens Christmas Sing-A-Long Favourites
All I Want For Christmas Is You: Your Favourite Christmas Hits
Christmas Party Songs 2014 – Traditional Christmas Songs Electronic Version, Holiday Xmas Music for Parties
Chants de Noel - Les 25 plus Belles Chansons de Noel et Musique Noël; Mettant en Vedette Musique de Piano Classique, Jeux de Musique et Musique au Piano
A Gift For You - Julafton Autogen Träning Snö Smycken Musik med Instrumental Avslappnande New Age Natur Ljud
Always Be Christmas: Songs for the Holidays
Whispering Winter's Melody: A Yuletide Symphony
A Harmonious Celebration of Holiday Classics
Yuletide Harmony: a Melodious Celebration of the Holiday Season
Christmas Piano - Classy Classical Christmas Compositions
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 0x4a45f17c6a1cf08c58473c4f5827d14f54c9b6580011805af62cf23d8d6e1a75. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/SEWDL6139084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b749d8e9db2a9a1e67d83b4807df9160fb88873ba7414d2c2dcf1189db4ab59. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/SEWDL6139086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380a630794c368809aa6f3dfce32c7c9a65adc3cf4b8f5ead5ff5e70ab70b821. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SEWDL6139091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ad5dbac3166f043afcaf88b682718fd80d806a1c0b8b1b3a5ce5941bce98ab. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEWDL6139095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09aacf91deae8ddca732e9a708f64105ae1a8bcbcb50d363fdaa4906ef7a6a7. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/SEWDL6139083.
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 0xe2d143153abfbd983969c19af9227c036e20e5bb45224a0f4d4417e3cfcd9077. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/SEWDL6139085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32723832bb6748de67f22cc37497b326072bffe184704ca4e1f9066480f048b. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/SEWDL6139089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1916e3cfad360d6506d72ad65540c28bbcb07f8987ee2223cc20d045ae9b22. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SEWDL6139092.