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 0xd06242fedb6a42b5bb1c426ca264ba55b05485d7ac52198c55e0011180ab126a. 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/1444e7e1-192c-449b-8484-f9e130df4af1.json and https://artists.proofprofile.net/proofs/artist/1444e7e1-192c-449b-8484-f9e130df4af1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Berlioz: Extrait de la Symphonie fantastique - Grieg: 2 Mélodies élégiaques (Mono Version)
Kouzelné melodie 2 (Písně ze světových pohádek) - Disney
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 0xd34543e94814c03557870493af06e1710cbf6eff66285a08f49ce9fdba5852a0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZA232400949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8abfa7e50534001fc24682d44d294b2ce83647bf3f83527edcf12757f30baf. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CZA232400950.
I’ll Make a Man Out of You (From "Mulan")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cde8572cc50053a7e125ad07f9afba0b55ba645d721b9ed3438fbdb529cbc2d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CZA232400951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86cd16c8e705a894a2156752fa41dc70ffa9a8fd669ee8e73930472e49380fe. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZA232400952.
Let Me Be Your Wings (From "Thumbelina")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9cfcf966a27f803753cc213f38a289b32b6397e8c68d0b4634aa816817a5f0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CZA232400953.
Out There (From “The Hunchback of Notre Dame")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf377d683e5f1dc6bd47c1b1b92b3987acfeadb6234f9d6512ac7021c7313e948. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CZA232400954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b55be9361dc761e76bb52aaf1c4c13e92fcc2a69eb7b5fd7ccf89b148f4597. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CZA232400955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd73635c17b047475ebe6b05f5ed3f55c57697f333548c2b778d0e04cdeb6da4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZA232400956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29511e45aa9a10e702c28039627d71313e28e0c41e7d52af04d203ea1cd9ba5a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CZA232400957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb096510e69310da85b3f675c0185f668fa597c83a33a73ea71b8c81f3175a5ad. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CZA232400958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57ff121ad42f8e8318eb3f31e368f742b149258d03e399de8909b58f44f38dd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CZA232400959.
I Miss You (From “Tom and Jerry - The Movie”)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b0f4b5b32228da4531fc1e17703707e923fa41cd36a82ae5a183745042ee93. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CZA232400960.
When You Believe (From “The Prince of Egypt")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6349414594298d7c44c0359e5f1417507f5b76320bef7cd58af57b81154c5f1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CZA232400961.
Kouzelné melodie (Písničky z českých pohádek)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7983e21c1943bc888c053ae9a85d6222be84b76241611e01a98074368aeef8f3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CZD942300470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7344af093f8375dbe1d840ad3336fb6dfd4815d9019e59786413b6471faa59. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CZD942300471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470d41b73b11d4614139f1c8ce9dc3c169865c9096b223263283a42edf3836b8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CZD942300472.
Znám jednu starou zahradu (feat. Monika Absolonová)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436a779b1f9516ab399a0ddfd4325a116a03aaf80ddb39f9385a1a3a4c4e6982. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CZD942300474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03158091c188eecbd564ba881f1cdc1c39469829a22356cf98d3a3856fd3ee07. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CZD942300481.
Já ti prstýnek dám (feat. Markéta Konvičková)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef17ef3bb4ac39cd5901b19d6cb801298c3c68f17f85681d710870f78d98daf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CZD942300476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d608991eb836552f3f6760a3f6991045b9e8200b40d641d8d97958c529c4659. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CZD942300477.
Nám se stalo něco překrásného (feat. Klára Vojslavská)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b730780f7c2a5595be14fc713ea922112d8a39ed77342c1b27d6d3e4c91ecab. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CZD942300478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe009b2dabcaae305588c05e3d07d7b3d9f7f95a76cf4c6edb410743297865213. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CZD942300480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0090a1045c3bc5b386ceed228ea3b0afd7f7ea1eb0db02205a2b462e097be9a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CZD942300475.
Wo, kleiner Vogel, ist dein Nest (Drei Haselnüsse für Aschenbrödel)
Foerster: From Shakespeare (Mono Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de5f1df8f22e861ff897fc4184731a0aa2d10cbe1e6ebcdc4d5ec4d72c2fb2d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CZM872100003.
The Key Collection: 3 Centuries of Rare Keyboard Gems