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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d576cb842fdd7d76276ddfea905b2f0f71abde2a6e52698d5972199d259c2e. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97bbfe20-17a8-420c-bc9e-38ef5ea3b68b.json and https://artists.proofprofile.net/proofs/artist/97bbfe20-17a8-420c-bc9e-38ef5ea3b68b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2b4a1722f291a380a6ae12a5ff9de5b758bb78dbc1200d68709183d126794a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLY331607190.
The Nutcracker, Op. 71: No. 12 Divertissement. Coffee. Arabian Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead6b6bcaa9e9532190968186c56ed3d9800f3d58b2818ad2ba6d5d9ecebcf27. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLY331607191.
The Nutcracker, Op. 71: No. 12 Divertissement. Dance of the Reed Pipes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63184e703cd03de9c648ed1c6220c9b6d7f9b06fd40257ee87a8c22b9a6b3ccc. 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/NLY331607194.
The Nutcracker, Op. 71: No. 13 Waltz of the Flowers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d570419ea8ad50b281f8890b1509cb86ee3b6ddcbef62029a6a3556a5bb481c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLY331607196.
The Nutcracker, Op. 71: Miniature Overture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28daf24fb1d88cb56703043745a82386bea447ddb311e9cdfbb6b0fad850b983. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NLY331607189.
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
The Nutcracker, Op. 71: No. 14 Pas de deux. Variation 2. Dance of the Sugar Plum Fairy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478f4842bc0e7dfd8f62e919f317869296f42ebc64626d5f79fd6c292ef2a367. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/NLY331607195.
The Nutcracker, Op. 71: No. 12 Divertissement. Tea. Chinese Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ad93945a4edecaffc56f59d93530e0bfad439a4228968caf3149016344f3fa. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NLY331607192.
The Nutcracker, Op. 71: No. 12 Divertissement. Trepak. Russian Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda89276732315ab4334292f551caeca51a82a52882cafa4ca5baf1678329fa6. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/NLY331607193.
The Nutcracker, Op. 71, Pt. 2: XVII. Trepak
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30641c0c1e99f7e82612fff31313f5e7812f95ce422d770b2fe8f0e499a6bac. 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/NLY331804544.