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 0x11c8e42a9977d5e996ea258d36d44172b8dbb82805ea50a11f0b309174b946bc. 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/86d67de6-d02c-4cd0-92e5-d1de68658c35.json and https://artists.proofprofile.net/proofs/artist/86d67de6-d02c-4cd0-92e5-d1de68658c35.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tchaikovsky: The Nutcracker/Glazunov: Les Sylphides
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 0xc5542c16283b4ea476c9677766d2a391527d55e449889201b3cecaaf8b3bcd3f. 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/HKI199339701.
The Nutcracker, Op. 71: Act II. Divertissement: Spanish Dance; Arabian Dance; Chinese Dance; Russian Dance; Toy Trumpets...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dafeb9c91a735a7f9b12b0e5653e57199eb59300e0bf3c5417b7875a47f0c53. 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/HKI199339801.
The Nutcracker, Op. 71: Act I: Tableau, Bild 1 - Scene: Decorating The Christmas Tree
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301dc3a403f650b192b4cfb97f3ceb35d385c2fdfa1095fd883aefbeddc9a42e. 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/HKI199339702.
The Nutcracker, Op. 71: Act II. Waltz Of The Flowers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc519aaec8a8eca24e5c7523c52a17ce2260b23f8aa04c4fa7d3a7c06f517cffe. 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/HKI199339802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26cab1b211965ece2075931414548aa55ec12711d547b76558e12fd55187498. 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/HKI199339703.
The Nutcracker, Op. 71: Act II. Pas De Deux: The Sugar Plum Fairy And Prince Orgead - Tarantella; Dance Of Sugar Plum Fairy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2951012faf8fa25c2a8106083adcb0c6f371e6e2af66b38973b949d85727a417. 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/HKI199339803.
The Nutcracker, Op. 71: Act I. Scene: Galop For The Children And Entrance Of The Grownups
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911068ad989eb046834fc2d144f4dda2d5df54a695afdf8c03b474598a0d3424. 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/HKI199339704.
The Nutcracker, Op. 71: Act II. Closing Waltz And Apotheosis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6427769c1e28cd5358f2296f8fb0c77db001e537ff8a26c0c942a61169ade20. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/HKI199339804.
The Nutcracker, Op. 71: Act I. Scene Dansante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9500d6fe96c553a0de7e84f2df22f2929181cd0a8b0ff39ef4c4bc8dc54c8c. 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/HKI199339705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8227e7b6bb00bf601dcf4c17cafa970ef4c515a05bf671c768efb40877cd927. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/HKI199339805.
The Nutcracker, Op. 71: Act I. Scene And Grandfather's Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e78914031c0dd83a49c086c3df468a58122fe8294082c8fb53debb8294f97e6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HKI199339706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9645b11b5d11c8a8974f925bce4a002b65b01dd3d656456a2d3b0c4e91bc66a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/HKI199339707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef71d8397d89910b5c97494a5ea8af67a00258280ff1d09a6bed2aea8255be4b. 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/HKI199339708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5b8bd5bce940f980eaa71013f6613815deac92eba09db3df8eb29a06ca166f. 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/HKI199339808.
The Nutcracker, Op. 71: Act I: Tableau, Bild 2 - Scene
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de17941947f75d75e86a1f129f759a59faaf6285249c5bdc2a6e6101f0c9cca. 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/HKI199339709.
The Nutcracker, Op. 71: Act I. Waltz Of The Snowflakes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27aa6bd03377412d4cfece7cbc210f9747d96d73c18a4c9d5eed3fb2e8a03ce6. 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/HKI199339710.
The Nutcracker, Op. 71: Act II: Tableau, Bild 3 - Scene
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3c33743c4cec98a8318610b333b5fc2425481da0e6c939dceac0b7b3ca1ae9. 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/HKI199339711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8b0422584c8cb0eccba0a7ff295b2bef7d1f9fa3a82be99d26f2b52d8657b1. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/HKI199339712.
Violin Concerto In D Major, Op. 35: Violin Concerto In D Major, Op. 35: II. Canzonetta: Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83727f62c16790c23c6412c03787981f21893da14f97da7afaba7150c9d4560. 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/HKI199607006.