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 0x79cd17dd361f5f1b1b90f532bc2160bf6bbe01a573c70677212ff9d2461632cb. 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/67e99f78-af7c-4a83-88ba-1f33c76f43dc.json and https://artists.proofprofile.net/proofs/artist/67e99f78-af7c-4a83-88ba-1f33c76f43dc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Wheels on the Bus and More Fun Kids Songs, Vol. 1
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 0xb4406aa832aaacb48eb06175436f4e90e260927b00578d0e8ad820cfef7d8940. 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/QMDA72189850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb166b6b82ceb3eea04f3d160fa5530c2819f1e4673f920161fa61db85fc3044. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QMDA72189855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456b972cefb92e5aa45b50f0bdeb783cf6a76beab1130f351f534ca5b83d55e0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMDA72189858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389ccaf80f60a62e4ea250ee64772bed9e7edcde4b7639198a846a0f4e12b2be. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/INY171501869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb752f54206ae0026fcb5522b75fedafb05aece1955f467b959b8add6706c6f0. 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/INY171501870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfb6efe985ccf07288b5d0748701912f77fccb10e765bbde4d1b63eb4b2b6fc. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/INY171501879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e133de4f875002f8ac5a5d54eb5c375d9873c63e8685cd1c5020bd940eaa23d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/INY171501883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ed44d1796a4a734011057829390cc736e0babd966554807e6d11a713a9665e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/INY171501978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57603d572e83fc1f98580480605d600cb990847d3803661fbf7fe84be430a50. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/INY171501856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8803f7531ebc0d5006767e9c6c35001c6536a849f71a39291838dddb54e3ba0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/INY171501885.
Wheels on the Bus and More Fun Kids Songs, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6d5a897fa64ec26cdea29c0859cfa7889cd4e4e04f46756fbb4904dc2e9f7e. 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/QM4TW2287739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831902a5d646c070c058db27c3fc34ace61193a718f52c88d6e623dedb0f4ddb. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/INY171502788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec76192b0a6e79a043f6423e9997bedfaea56878e1883b67286a6cc557c893e. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/USL4Q1980699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4620327990be4abcc0df43727265fbbab261ac176dc1168c590b2828580dbff1. 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/INY171502469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e712412dec2933156dac78aafc2a66f72454b0dfdd9c3ff80f3acc6672ee540. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/INY171501864.
Best Nursery Rhymes from Elly's World, Vol. 3
Best Nursery Rhymes from Elly's World, Vol. 2
Best Nursery Rhymes from Elly's World, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf850f3784ca262d78d3e8a5d9f65ac9d5ca34e54a7c2483f978bb9f41258a1a. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/INY171501861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2205519ce0f4d2df357dc92d5c3c6770ef3371c83f72341cfa942be3b647b1. 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/QMDA62250761.
This is the Way We Brush Our Teeth (Spooky Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193e9e278f4a2381e4292e25830dbbdd660192cdf27fdb01f232f5f0a38f4a97. 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/QMDA62260612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0043b833f2508663f64cd0177f22829575bad90546539eb8f2a2defb703f59a8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMDA62213252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9088ce000e4c0ad4ffb9116470bbf35e13b030c3c42eeb1d1597321f8c29cc. 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/QM4TW2287669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ff0dcc50d88568e19e47dd37f8ac563a904e820c7b7f1b0cdeba59403fc904. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/INY171501827.