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 0xe452c8abe36a98fce5bfd3e494777b49c7349882759977efffd405f21234f8dc. 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/eb2fc4da-1314-4bcb-97c0-75c6fb0936fe.json and https://artists.proofprofile.net/proofs/artist/eb2fc4da-1314-4bcb-97c0-75c6fb0936fe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
How Much Is That Piranha in Your Gumboot? (A Fun Collection of Songs for Younger Children)
How Much Is That Piranha In Your Gumboot?
Little Blue and the Living Treasure Band
Little Blue And The Living Treasure Band
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 0xf7fb97c54a10e08dcf7719a30713bd1b57207d34bc202754d2ce43dd1b40a5a6. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/NZAM01801557.
The Wheels on the Bus They Don't Go Round
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd826583cb84b8429790ed1a62b1575d5ec1c7a9819953b42418d78748501fcf4. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/NZAM01800100.
How Much Is That Piranha in Your Gumboot?: A Fun Collection of Songs for Younger Children
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b93118d1dae071d45949b11194f321688480f622635647bb28316f046a6175. Chain 2 (Bitcoin): anchored in block 957579 (2026-07-11T14:35:38Z), 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/NZAM01001330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2557e7187f25dd5f8d672969c5fc2fda3f574cde2abafdb55738720fa90c7eec. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T13:39:11Z), 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/NZAM01001334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d7ae40ae6a3805698d40698fc41346641d662dd5fd864c6661ad66d305658b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/NZAM01801656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5f9815efdfe27327759f65b8ff9dab1723ca69931b5c876c9ed1904cdc4613. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/NZAM01902049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58622cc238ce8c0bef02392fb52caca9df77345f4484a92463246029c676ea52. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/NZAM01902147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27f28df49cfd46ada7ac09d25cb7cd495c0cb50fb03dca70b3b8015f4ddbbb0. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/NZAM01902460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11dbd3a36000180425ff60f6a8cf86e0fe4084e4e3f0145dcbfef18682d521e2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/NZAM01903119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed5c436e398bd760ebb5543bb68bbfaabecc84ab24350acc10eb971c69228ac. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/NZAM02001654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23c1bdaa2b81b084603c388bfdf4a4187a54f337aeb827d9b3d2a6addb9816e. 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/NZAM02001509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efd273ee5fd9a82de425ca9dc3202bb9a45b13cd4b98cf89f1eeeae87523906. 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/USCGJ2154675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025dfa7b5ecec5d7e3420e745d346c4212bb962186d43fb319cba536b3229e23. 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/NZAM02103178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea28334f7302f7242c0ebc9d76757614dbedc36cd569c91cac02e6cb942fc81. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/NZAM02200125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2c735800b77b7de616169092a9d1ec7ab677c045b5cf771c4d006777a1844f. 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/NZAM02200123.
WITWWBM (What If The World Went Backwards Mum)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305352188473bfd26fbfaa5392f95d5252102615cb72cc178cbe652ece5bf543. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/NZAM02201470.
Funny Little Bunny - The Springtime Action Song
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cd969092400959a77c5339405579bad2bf6de59eb5816472294b62a0aeebf2. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/NZFC02200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92880e39c382c8c06423710dd1d4549d46179c7963ca141e66977d028e15f1bd. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/NZAM02300477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3dff89f9f2a2a78ac1f281370098e8131e2693b447932e773ca15b6df0019e8. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/NZAM02300475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616774df71ae3e361a5749e5bd6f1a3b785621c9245a3a9be7ee6fec6ac753df. 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/NZAM02300474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3157951723bf57ee74700bad642029a6da69b50bc3d6c5a7277b810fe6d99ed1. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/NZAM02401667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255dcc1236cb73ed366348f68a10cf5c95508dfcb018d29dd60de801dc2c4b3f. 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/NZAM02401668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce57d9e1cf5da771243630dfe16b40304bf98e8b6be5ffb0839853f271fab6ef. 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/NZAM02401718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3c07b2e590eae28f06ab6226b29e24c077b4e5df634df4dc9fdc1ef7b8f5c9. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/NZFC02500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fffd9fe371c8b9080ede7ff59c7c12a8bb3dcabda0a5965521a641163efb0e7. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/NZFC02500006.