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 0x62058244a66e216d337cbfd67ea7bfa894cfd5c5816a4c38b717902221ceeb77. 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/2bba52b1-364e-412a-983c-68c59276032b.json and https://artists.proofprofile.net/proofs/artist/2bba52b1-364e-412a-983c-68c59276032b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piano Sleep Music: Relaxing Piano Music to Help You Sleep
Romantic Piano Music: Soothing Piano Music for Relax, Study, Sleep
Classical Piano Music with Ocean Waves: Deep Sleeping Music, Relaxing Music for Stress Relief
Classical Piano Music with Ocean Waves 2: Deep Sleeping Music, Relaxing Music for Stress Relief
Classical Piano Music with Ocean Waves 3: Deep Sleeping Music, Relaxing Music for Stress Relief
Classical Piano Music Essentials: Relaxing Classical Piano Music for Studying, Sleeping, Relaxing
Peaceful Piano Classics: Soothing Piano Renditions of Disney Favorites with Nature Sounds
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 0xeea658b10e534ad0ac13a3e62f84e91431f4683d089a25da47cb5b35db317514. 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/ITK262102574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a9966c11b08d0d6b30458f599731be969b7ab3b6dd95aff1134c4a4334d0ad. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/ITK262102575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6643d71b70090efd5b0539e6b0f36ab5b2327b05c01d5bc9653a5f94a6c4e2ea. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/ITK262102576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f24fc283579446f0c09c39a7341c107df16fba7efe468937dc85a068f2b838. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ITK262102577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6732ea2985abba8d4083d8881d3d95c28afddc6873b4f10d0d84a3f227fc8142. 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/ITK262102579.
Classical Piano Music for Sleep, Vol. 2: Chopin, Satie and Other Piano Favorites
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a916eec674ccb13a0ffa318866673d51165ddcf266a8103dd334deca39d6d07. 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/ITK262200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e9f876311fa2a9acc52806dc05ad9eaf2a46e7115e54ec52a7f8a9e330f79f. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/ITK262200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d089a0c141da57133a4b133648f2b8932b3687005c1b2b90c06eb303ea37f4. 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/ITK262200005.
Suite bergamasque, L. 75: III. Clair de lune
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdc0b5abce3caec7b66e7d34dc0edd513c421a36502a5e532dab8051d430155. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/ITK262200006.
Piano Music for Deep Sleep: Calming Music To Help You Sleep Longer, Deeper & Better
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4dfe7b49835f18fd713f8e96fe3b0fd324ab360e893012458f26e3cf8afa1f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITK262205152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733d9e4f820a4b4ac2d24682463476503d8bbeedb332c8e78eadaa9de1e3bc34. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ITK262205153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c106019888c47cd19208fcfc516a0991db7ab3c30c201381caa1bd54bfa83b3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITK262205154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6107dbc99c71f5616266679e6665ca19ea8dbd855db37458a0e6c5f5cf1f47f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITK262205155.
The winners takes it all - Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa5e3d2285e5c10a489a9a2b19f006e8344bb6b28e6783f18a918093445a2f0. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/ITK262400775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256702de5df4d925fb187d96d6a8888c8c8d929e87c7ef3e9da5e3aac9ab194f. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/ITK262400776.
Bridge over trouble water - Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ebd4de127d4b7c014abfdd1d18c0dfdccd5946fde67b9ab089f877103d3e3d. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/ITK262400777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016ddfdf3a6cbe1c41982b798861b7222c9692a7a35eb03b1d5c236720973aa8. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/ITK262400778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b89b244b381a44a5216ead4e8bcc4d74d095a29acad2491eaf7c6f7b0c2b63. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/ITK262400779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e169be3f3b08defd0f0b1144be3db111c0eda81854a373fc5afc642eacabc07. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/ITK262400781.
Piano Covers of Popular Pop Songs with Ocean Sounds, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07efc53fda01a65d677635da3674b6bb29afcc3457d3d4d5347f8bb2a74b6bc4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITK262300252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c24477d4f2a1c422d6062f34f9d3e08f0b9730b9bbd49c7502fb280ad5f28b. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/ITK262300253.
Memories of Snow - Nature Sounds Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f9919951b890ad20a38c2c016f19d33edcdf0a0735de903ef55d24c11cff57. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITK262300255.
Poetry in Motion - Nature Sounds Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28582540af072770720e22f50b9a53569f8619bf04b52a91487603e3b961b775. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ITK262300256.