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 0x8374067fcdedc066059dd7b0086f80fc2ba724142d3d119384051dfca41bd5c5. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c590579c-0b6e-48be-872b-726c743ef559.json and https://artists.proofprofile.net/proofs/artist/c590579c-0b6e-48be-872b-726c743ef559.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Twin Sisters: 20 Animal Songs Every Child Should Know
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 0xd1bda0b3e92b98d4cd7f0ee526e243a499720cdddd9ec9f1dbb17f5729cf7d42. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:49:35Z), 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/USFEY1221425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5ec81a11c043e494edab9f20e4794e6e74b563ae5fbee4043eaaed02b9b0f0. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:19:02Z), 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/USFEY1221427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf578413eebef2cfb0fe25bde4fd00ffb6b8b7221c184ed20f924436984d56ebb. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USFEY1221428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd54852191f7f528b9fd21387c02ad46becc1b073ad3e80a81ad21345543bb2. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:11:47Z), 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/USFEY1221429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4080eba3f49f5667e85ce986bfa898726f57e110b382b4e6cb94e1c214160466. 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/USFEY1221432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069f60de133ee323b7c0ffece1d58917976b25f2f6f4cf8598f801030edbdc8a. 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/USFEY1221431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc783270293d52c41edf0b252aba1d2de4daf6b7c5e32b0be0211fef5dfd68c. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:30:07Z), 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/USFEY1221433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a09fdd9d71c1621995058d8319ca11eacf0ba53311889a403944a7b5c7a5f62. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/USFEY1221436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2f6e791a26e5a7201943096f5837d362ae0f60afc18b077c8df25141ee0424. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:38:45Z), 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/USFEY1221439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558494396406111bdd3475208b8317603254c6fab385f7bd8b8bb977c708f6ab. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:25:46Z), 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/USFEY1221437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd6341965fff3d90c6b6936eb3e28ae512266e756bb50ae54a94e60810eb23a. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/USFEY1221440.
Twin Sisters: My First Bible Songs - Rise and Shine and Give God the Glory, Glory
Twin Sisters: 25 Action Bible Songs, Vol. 1
Twin Sisters: Mozart - Before You Were Born
Twin Sisters: Christmas Through the Eyes of a Child
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c69e34ca55ec8d0caf87ffc49083ed78836426f7b9a0273b19e5842050ca2a. 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/USFEY1221376.
Eine kleine Nachtmusik, K. 525: II. Romanze
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75df08d194a7194f55f6a8d8c73ee4ff8b0e8af40002df4e58b61e2cf5ec1528. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:00:29Z), 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/USFEY1221378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7892abd2fe77dea28bc9192f35d3a7548081d2bf09b4789a82e932ec35f30967. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/USFEY1221379.
Piano Concerto in C Major, K. 467: II. Theme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25963a9bb2e06ba7346a3a52daff8cd18dfaa3b9f8b6fa5fa83a52322c1707ef. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:01:03Z), 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/USFEY1221383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99dc9da5ae4581084c4f8a29e6c1f7e929e326b2cb3e58547e4567099023615. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USFEY1221387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f40ce7aaa4f39f8f89362f2217cf642af4755c1a5e0823bc6df703b8021aeae. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USFEY1221388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c85066d09addc77259ff7c9cdd0f16e8c3c91e11e69a30433a60a7f081039b. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T15:41:26Z), 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/USFEY1221391.
Twin Sisters: More Songs for Learning (Split-Track)
Twin Sisters: Fun Morning Songs to Start Your Day
Twin Sisters: Classic Tunes for Kids, Vol. 3
Twin Sisters: Classic Tunes for Kids, Vol. 1
Twin Sisters - Happy Songs for Lazy Days
Twin Sisters: Ultimate Bible Songs, Vol. 2
Twin Sisters - Ultimate Bible Songs, Vol. 3
Twin Sisters: Ultimate Bible Songs, Vol. 1
Twin Sisters - Celebrate America Split-Track
Twin Sisters: Classic Tunes for Kids, Vol. 2
Twin Sisters: Instrumental Hymns, Vol. 1
Twin Sisters - Baby's First Ocean Dreams
Twin Sisters: Instrumental Hymns, Vol. 4
Twin Sisters: Instrumental Hymns, Vol. 3
Twin Sisters: Instrumental Hymns, Vol. 2
Twin Sisters: Lullaby Blessings - Jesus Loves Me This I Know
Twin Sisters - Daddy's Lullabies Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa612fa2a9692aa3639875c04da054d1d95986054844700c7fe06abbf6ff50016. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/USFEY1221997.
Twin Sisters: Christmas Memories, Vol. 1
Twin Sisters: Silly Songs for Kids, Vol. 1
Twin Sisters: Kids' Traveling Songs, Vol. 2
Twin Sisters: Kids' Traveling Songs, Vol. 3
Twin Sisters: Silly Songs for Kids, Vol. 4
Twin Sisters: Kids' Traveling Songs, Vol. 1
Twin Sisters: Silly Songs for Kids, Vol. 2
Twin Sisters: Jesus Loves the Little Children
Twin Sisters: Silly Songs for Kids, Vol. 3
Twin Sisters: Gross Songs Kids Love to Sing
Twin Sisters: Nursery Rhymes - Humpty Dumpty Sat on a Wall and More
Twin Sisters: Giggly Wiggly Songs for Kids
Twin Sisters: More Giggly Wiggly Songs for Kids
Twin Sisters: Sing and Learn Bilingual Songs for Kids in Spanish
Twin Sisters: Toddler Sing & Learn, Vol. 1
Twin Sisters: 25 Favorite Christmas Songs for Your Family
Twin Sisters: Fun Learning Songs, Vol. 2
Twin Sisters: Fun Learning Songs, Vol. 1
Twin Sisters: 25 Action Bible Songs, Vol. 2
Twin Sisters: Jesus the Best Thing About Christmas
Twin Sisters: Sing-Along Christmas Favorites