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 0xad72b9366773d34ce7167e10deff5fe37a46507365972d1250c7bf6dbb6184b1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f9f0617-709c-4942-a746-ee3cc8218f16.json and https://artists.proofprofile.net/proofs/artist/8f9f0617-709c-4942-a746-ee3cc8218f16.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Peaceful Shores: Piano Tunes for Relaxation
Piano Puddles: A Serenade for Little Dreamers in the Rain
Soothing Piano Classics for Sleeping Babies
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 0xf952ea7dfaccb768a6d96d8bc8a7cc871a8a30025f7c95fd8d8fd1c6371ea626. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBRKQ2440903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b9d2630cbdea9580e54b9be8c73792045d92a78fb9732679e2b066ffd8a8c9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBRKQ2440922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d1f83b03e7cfc4069adbb7b39bbe6b2d775521ec1305dd5055ac4d6da33ef6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBRKQ2440929.
Piano for Work: Melodies for Productive Days
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43e0d58bc70b9f3f50af919c82f4a1af7d9157863ed7a109986723e77dd281e. 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/GBRKQ2400699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa8c2d3ff4af540f86c32ab0e75e577f626fe5597348e79b3afb2f4d0a370e0. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T16:56:07Z), 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/GBRKQ2400713.
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 0x1aa259d0aee1e4faa8a6ad434b551bf55d390260a7e16bb50733f3cb188c18b8. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBRKQ2400668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb373335b9e2b437107e2efc536c874ce54010dcba8ba481e3fe82f16add8a541. 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/GBRKQ2400684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7359cf28bc9ff74aa0370c85b1ea8cc703add16f12b838118aefce06a5feae4d. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GBRKQ2400690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ce499b366295b2752e5155ed9a995b0ae2347a7390f40136c7d07e22674873. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBRKQ2400723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfea98cd06346639ea09f8e542614cd4d2a450cddf54c802529159094e90458f. 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/GBRKQ2400738.
Melodic Piano: Tunes for Thoughtful Relaxation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623bcef66091a032954c15215483f9d1415c60f2ee58592cc04d1653f6e41a77. 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/USLZJ2478290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569b2a2b6841f62338a8d3c988923cdfb0f0e7513a7019f2e479a82e049495a0. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USLZJ2478278.
Piano Essence: Echoes in Timeless Rhapsody
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475ae3dafc1ddc67767aa3d63aae2f23653c8f0361196da0c43ade7c9a07b419. 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/QZ5FN2433958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ec973965fff0d97c07a98efdc7b66c552a962b1ac05196901edf13bb47b9ec. 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/QZ5FN2433972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e0c143ca28ae49923f44aa001c27db5a5d5dadfdd9762c9a076a5bd409d6b6. 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/QZ5FN2433991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0faf6d3c72b172fb4d17a0136d7e2e344ba819b4b361fab3f7e0a0b04c8bd5a. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZ5FN2433978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b76bd3c95cc4a2e4fd8cc9ba21a4d994595726a00215d77278f240fa096c38. 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/QZ5FN2433999.