Kurt Donald Cobain (February 20, 1967 – ) was an American musician. He was the lead vocalist, guitarist, primary songwriter, and a founding member of the grunge band Nirvana. Through his angsty songwr
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 0x729c126b82d44a5c515729fd1da72efa6e0234c7c80a4124550dae960c185be6. 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/e42b7803-8ebd-4a7e-bd55-78ca8fabc718.json and https://artists.proofprofile.net/proofs/artist/e42b7803-8ebd-4a7e-bd55-78ca8fabc718.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Montage Of Heck: The Home Recordings (Deluxe Soundtrack)
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 0xec50e5d9ef33e04f1144cd3bc6c4050359a877962b4f695e54d12d725418e3f4. 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/USUM71514590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac36612dc1bc5806e2efc2ca88b74f22320bcfa4270042efadfd0ea5df9b93d1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM71514591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e29bb0c8309207ae6ef51f83aca3240388073ec40b5c7aa7135e1c00da134f8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM71514592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62c3c5899162198d39cd69fd13c72999c90550cc1882218964625a56de89486. 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/USUM71514593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a47537ae8c5c394c7e16057c9cbc43b23b4b7619fd502e7a019b550adb6005. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM71514594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb769636eab2c016e13844b70249c69735d765d2dc3735d45b382b50967e8e85e. 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/USUM71514595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93a44ec61fa88eed22817cccd0bfd564c6e3de337f69f4328a0a26a4a1ab1b1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM71514596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24457de044b5292d37e23b60097351c47af8925c6908dabbbf202473468276c2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM71514597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937d2d8912f1694a8842a4947954d279c1882de621e420685b5efa308d86bf7f. 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/USUM71514598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a95252280ee1f4ab43fc428dd6f1a59af40df32234dbf31ca281900fb8a6c43. 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/USUM71514599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f7060da49030e693ee1a05d3a4ea0ed0ee23342ff2dd24505677fce26d9bb9. 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/USUM71514600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3f13dfd76ae01e7037799fe0e6bcb876942ae0afbae0c0b48b687e332c1676. 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/USUM71514601.
You Can’t Change Me / Burn My Britches / Something In The Way - Early Demo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9eb4b9b04202b4d37a2a6d7b142be46ccd464c028bb8e56cd52503e6a56c31. 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/USUM71514602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109f5a60b589d787cf59731534e3d1293aa33ac03b619535ac89115b19fe9660. 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/USUM71514604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfa433c4275d14f88df1099376521269ce913e5642b6f6d0c9632841cd138cb. 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/USUM71514605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4e3e5e319d43790236e2530293ba2ff0380a531084b77bed1c0f3f95f8989d. 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/USUM71514607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe933fbddcc80daddf97d7273ce8051606c075674a35c09cfc1b611a4f28e96ad. 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/USUM71514608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8125e27c8b5549dbd3a82a3bc541017faa77c3175ca40937a7b8b63ec2f783. 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/USUM71514609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1afae1224c2b7a22e765fef497d21d8953d72fd1fc10f4ac0013935c7a5202. 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/USUM71514611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03624bc73774ee20223beae1d5c399bc7b3f199681a354621252f898fd64664b. 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/USUM71514612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666e09f9b45ddc6742e666c00d0ef0da48a8a17b2146d5cdf84c2965aea6c424. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM71514613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94ee9e9e3f7c82cbdc25fbc31b500366d24ef53c7775c6bdd64e508260d685b. 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/USUM71514614.
Frances Farmer Will Have Her Revenge On Seattle - Demo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a33f635ee95d44296ac900b227f6590cfe9be55a8202fc202cf07370e91033. 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/USUM71514615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa891731abaf7401dd6510ecc5f6b33b302e387cbba71f3b2d880c3522737ed3a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM71514617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe645ea250af201d89f651d5617bf4689f9e342b0ef89963c5202713f4be78b36. 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/USUM71514619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae1b52bc6dc130d5760ed09af8ed4f78b5d429c1d8c5f31d83c101d727be6a0. 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/USUM71514620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba794406787c6d5f5b8f5bd7a84e75a9c5d9e914eb20ae14bf4cf466507100ea. 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/USUM71514621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46734b3065d7d73baa98726a8ba41a7c39d7ba96bbe5cab347aa6721105fede9. 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/USUM71515157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac36612dc1bc5806e2efc2ca88b74f22320bcfa4270042efadfd0ea5df9b93d1. 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/USUM71514591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a47537ae8c5c394c7e16057c9cbc43b23b4b7619fd502e7a019b550adb6005. 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/USUM71514594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937d2d8912f1694a8842a4947954d279c1882de621e420685b5efa308d86bf7f. 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/USUM71514598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe933fbddcc80daddf97d7273ce8051606c075674a35c09cfc1b611a4f28e96ad. 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/USUM71514608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8125e27c8b5549dbd3a82a3bc541017faa77c3175ca40937a7b8b63ec2f783. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM71514609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03624bc73774ee20223beae1d5c399bc7b3f199681a354621252f898fd64664b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM71514612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666e09f9b45ddc6742e666c00d0ef0da48a8a17b2146d5cdf84c2965aea6c424. 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/USUM71514613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a33f635ee95d44296ac900b227f6590cfe9be55a8202fc202cf07370e91033. 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/USUM71514615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa891731abaf7401dd6510ecc5f6b33b302e387cbba71f3b2d880c3522737ed3a. 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/USUM71514617.
Smells Like Teen Spirit (From "Black Widow") [Piano Version]
Smells Like Teen Spirit (From "Black Widow") - Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3589eace3fcad3970ed70872f735046d6b771f6c111be934640443990ddcada. 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/GBRKQ2308414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab77365cb66ec4fbd5b8695d1cb93bde1d44d630e447aa6539200e2caddfa90. 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/QZPJ32248273.
Something In The Way (From "The Batman") [Piano Version]
Something in the Way (Teaser Trailer From "The Batman") [Medieval Style]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0977dcc22ddcfebde7306091f61e00a3b28697b54a17b38866fc2c99950cdaef. 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/QZGWX2009327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73008add15d3dc7f528bbbb75000dc3b4f964229aac44fd4304b98f37d2efe5. 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/US2391542850.