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 0x9ad57074e4624557e4828e1f46f1f042033373f3f36222fb23ca926c72418b28. Chain 2 (Bitcoin): anchored in block 954019 (2026-06-16T23:44:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36ce2492-4ca1-4694-b9ac-93427f952646.json and https://artists.proofprofile.net/proofs/artist/36ce2492-4ca1-4694-b9ac-93427f952646.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Romantic Age, 500 Years of Classical Music
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 0xeab31255f7651823c0dc03065e89bbada21044f457c8ca090a996d2765256298. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLY331112153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869e1d7aa6a14ff18444395ffd7b004f57c8297734a85e0e4efd46412736c7a1. 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/NLY331109596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd141de5fd3ea32a156f14bcc2fb1adae176fe7a2eaeb86c33a17dc53d84d6462. 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/NLY331109600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea541945717c5d00d1a2da7cd742aa7b0a51972a20398af7943457c27b804363. 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/NLY331109605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8547a7bcf912278160b25928695d2c2d3e67f73c2e8ce33e6ce201aa2f59d877. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLY331109610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c89d06b342cfaf25ee22907dab7614f213f367e4122c9b078826dd2fc504f5. 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/NLY331109612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb7de2e6bb53530660ec0e794fbadb85abadfb276e69417cb181139898cf345. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLY331109615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc78c19bbdcac3b6430ddfd87a0bbc0a5e1d407f42d4be89769cddabafbe5d5d. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/NLY331109623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19953a776dbc7962e7218333d45d74084c8fed7af798da6d9a0f3f5ff17a669b. 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/NLY331705609.
The Carnival of the Animals: XIII. The Swan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaca65c985c2402772768143126444ddd712fc74ee840eb79d58707ca14ce6f7. 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/NLY331406494.
Summer, Sun & Classical (150 entspannte klassische Titel für den Sommer)
16 Waltzes, Op. 39: No. 15, Waltz in A-Flat Major "Lullaby"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed59e49efb0fc2b7e766318a3b12c5995f6824fdfd2172f3af7a5413f834ad42. 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/NLY331310266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6071dfce86dac44d3f668f89abc2d5d2220b8624f0f9530fccab796df3c312f. 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/NLY331310286.
Top 30 Favourite Classical Chillout Tunes
Serenade No. 13 in G Major, K. 525 "Eine kleine Nachtmusik": II. Romanze
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415f3d7f3f2a204339d141b7bedd614df80543beac3c91794ac0e60f5fc4904c. 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/NLY331310301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbe617c3f02099ed48bfc38ebb7604bad0c8a0cb2a4e401f336b3d977169baf. 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/NLY331310319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f2b4fbbc307009a64f812dd2da5da082640ef29ff0668ba1a28f66cea9a214. 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/NLY331310299.
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
Klassieke Muziek voor bij het Kerstdiner
Episodes for Two Pianos in Quarter-Tones (Live)