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 0xc49d9ab1588293391211092fa86b94ddd7a7d8fe1fd5cb34c77b30694459d3a7. 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/1c9e45e3-06eb-471f-8d86-1cbe72359184.json and https://artists.proofprofile.net/proofs/artist/1c9e45e3-06eb-471f-8d86-1cbe72359184.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x7feef8b26c29b2a1aa265140f64b037f32c2f21a10a2eff2215b6b05d5b6ee93. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USHM21689033.
Calm Lullaby for Deep Slumber with Soft Rain
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d99c2bc22be1e196b430bccf3974ed4744f71cf540bb08f676baee0edee11b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM21689046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb989233f5833702172b69e1419cadbdaef5ec3d94e82a3e3533f15c43af76c. 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/USHM21689037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae7ae4df361c90d703b4ba6556769fa83d460c81dd498ed866da63742dae7fb. 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/USHM21689038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049ec204fd1f31e5dbbc8acea2b26a455a4ef975269f3c51623179b8481df8a3. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/USHM21689039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dd882422a309a837daea9e4e724281091212ee6cc00acfd100c84b7963c887. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:00:52Z), 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/USHM21689041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b552d7befd978a9006c7099f528840da5356b5a2ef7d518bffd094851d85b8b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USHM21689043.
Piano Lullabies and Nature Sounds for Sleep
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf65664360065e400e99e78318dc6e1b4dde6ae1324cf690aed259fa346e231. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USHM92067136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6519b394d4f8bac9631253989771c935a50985428eb2d1aacdf562917b60f1. 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/USHM92067142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c58c5dbe1c2c294423be0c8caa6b8e266ef9e34760b00dd7a64f96dc26bee5b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USHM92067147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74811662ea69f262a79f15fc45fa073bd5385febe45ce9448963e8e98257283. 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/USHM92067148.
Clementi Sonatinas for Relaxation and Sleep
6 Piano Sonatinas, Op. 36, No. 2 in G Major: II. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0b189a1b5bbf8e3d8a2c677a4082b28f33d5446589bbfc00f314b46805e1b4. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USDY42124193.
6 Piano Sonatinas, Op. 36, No. 3 in C Major: II. Un poco adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4913e53471b56080c36a00af96213b9d5429412e5799355a80f0774445cce9dd. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/USDY42124194.
6 Piano Sonatinas, Op. 36, No. 5 in G Major: II. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55a3e055c0024d63c3bbcf70e3c098a66c34366b44fe4b8abf778dd7e8965eb. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:52:58Z), 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/USDY42124196.
6 Piano Sonatinas, Op. 36, No. 4 in F Major: II. Andante con espressione
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0939cfb92720a61019e5c82e654a6db393de626fea74000988a96d3c51c996cb. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USDY42124198.