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 0x002666e22cc925b81f4390022602fb1f7add5d5150ea2e3565d8ed37246ea603. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d94738b-3e68-4339-add1-e0be54bf863b.json and https://artists.proofprofile.net/proofs/artist/0d94738b-3e68-4339-add1-e0be54bf863b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Twinkle Twinkle Little Star and More Favorite Kids Songs
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 0x3db80d116168800a7ffed27dbf3ee69470ec0702a8f57256cce5b89b27a4cf62. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA560510880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffaa7b6a349d2466193f5d772820a4835d20201106d6c8b2445fd749a3c780d. 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/USA560510882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc5ccb20faa15752de6a421160f7d3470a9ca3b505f025263a57ba3ab229583. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:24:12Z), 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/USA560510904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d70a47a8c8273ac4cef7af0327e195a72c6cac624fad57868aa5f75abbf99f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA560510914.
Humpty Dumpty: 10 Timeless Nursery Rhymes and Songs
Row Row Row Your Boat and More Playtime Songs for Kids
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d8662aea2322f908a6780cb3ff5f96cb8c6be6c8c908bd93b289c264b6f8e7. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GBBMH0975001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bac6c22f120ad4aa10febdf97aaaab64b585d5ea735135c4ea789baf2c66cd8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBBMH0975003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f452061d9c8be5fa36985ec5088f5f6e2671e0b7df251ab2f1f2123cad6ec6. 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/GBBMH0975018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2111bfb8e9afb8e8b439facacab82bc8f76bb9804189c1006edc16c2e899c37f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBBMH0975021.
If You're Happy and You Know It: Songs for Playtime and Learning
Do Your Ears Hang Low? 20 Silly Action Songs for Kids
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce42b2d31faf3a1fd0086b5228899b2a5eba46388636e987c534d91ea1546675. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USA560510862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200e8da6f03945b852396dc0c24c4774ad9871da45df226c9d91edcbcb94e07e. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/USA560510864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96733ff96efd2c1b9fcca3651da2570a640d6725f59d680465e98d56d778aa8. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USA560510865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515636c000aa7680927fb40f805f9d18ae1f8b44b2cc13a699c04b01d97fe947. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USA560510866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2e73c1ba90d7c797d7f2789aa83bdca14781cc89488f00d0b9f19982ba7af0. 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/USA560510868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cd87572352f8753a1eff84258bb7595a28b878be0733ddf1e200dc3307674a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USA560510870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082c878497b78d640cb6fc6e595424d6ab15a9fb0e979be5710d648fd8585555. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/USA560510874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2d4e267546ed7d3df5f345d3ecaf9dc94e4f9b49615ce56c5d6263c3e8dfc0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USA560510875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61fc6ddba79f859a76dd20a519863d5a36131097dd98282cd1eed88605b060fe. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USA560510876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b05be413529e022f7e0303a8c7ef851b681e366ae1961278786d37a4cfc9823. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/USA560510878.
Wacky Action Tracks - Fun Songs to Get Your Children Moving!
Kids Workout: 30 Essential Nursery Rhymes & Children's Songs to Get You Dancing and Clapping Your Hands!
Baa Baa Black Sheep and More Favorite Kids Songs and Nursery Rhymes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84c6f588c7ff75c02c00161530cae62359f1f2f91fb2726332b0a50834be8f4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBBMH0974918.
Back to School: 20 Kids Songs for Play and Learning
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2111bfb8e9afb8e8b439facacab82bc8f76bb9804189c1006edc16c2e899c37f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBBMH0975021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864f137c76560840629324f615eb2a0557e71a9d4741ef314e7253986bb3e4c2. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GBBMH0974909.
Fun Adventures Action Songs & Nursery Rhymes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03e83e6031866da1422cf559099f5c37d0fa5a1ecd0bbe6489a73ba6a2406fd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBBMH9864522.