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 0x0f030a36dfe5b8a0c86bd6c6d96471c00e6f499ebbf8b693a671cdc5d3d0df8b. 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/4584330a-2151-49fa-bf48-e3a5ff483491.json and https://artists.proofprofile.net/proofs/artist/4584330a-2151-49fa-bf48-e3a5ff483491.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 0x6ea563bda68d745a9ee97513759f7b8402cfbbeb7727f59203eee59982609750. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBRKQ2442365.
Sleep Enchantment: Night Piano Harmonies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb402962429bce25c4569af70d6318476beae44c317c02426d666ac1a37ab98eb. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBRKQ2441251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7923fe45545c51245f9d6bd75408a3c893a02b5ecb8dd62191ae39f18e0f7a3. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBRKQ2441276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb8f5e47457bb157a377df218591ca2a8764e482ef553992d65711acb33a455. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBRKQ2441292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf50dc4ecdb873042c2f2bf9030bcfeba4748dcd15459ebd849f428610268b2. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBRKQ2441311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cce775d5405ebcd3533d68fa1c6335ebb4b003bc421698590d6eac57bb44b7. 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/GBRKQ2441328.
Piano's Cradle: Serene Notes for Peaceful Sleep
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb0e6fc91cec7836e64dcb76f3434530805f9ae69dc81c9739ba1090d78444f. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBRKQ2411214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bce33ace14d42e2f43e14842266914892caa1c8e9283c895078ed52db927ea1. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBRKQ2411219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8485bda73d62e52d534ad4e89a9eb083617b5df60fa8852a508bcd7777c145. 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/GBRKQ2411234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697136a1e084ec5aac4dbd7fd03e24f2a75a3dd01d15230064f02980df7dca2a. 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/GBRKQ2411249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94426878a67450b8eae258a857e6205fb4caa99237bfa1efdf09ba2a23032095. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBRKQ2411257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb5e5cfa1d4fd7b98350d67a29e06fcf8c345b931d34d42c90a1017aaddedfe. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBRKQ2411265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe572304d67befb0038378d997f4a9a590e662425d6c3ba122b3cd4569524cb2e. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GBRKQ2411280.
Piano Meditation: Calming Melodies for Mindfulness
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734116ee26a27f8639fb36ccdd235075cb166742716b6f7055c1a365b18e285e. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ESA122437420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aacf700293535b3c8016807f31dec9df678110862252c1e524892550adda4ec. 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/ESA122437426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca47d3ae3620dea4ac0e68a982e4a89fe72a0831de3d9915c964d2058e09f7f7. 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/ESA122437233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e0246a36efcd78e00a0043be64efd21bfb33e99acb90dcc7627560d966a612. 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/ESA122437239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5498425993e5d0a1ff40b66bc1d709743fb50618f454dcaf9f11ef78a5a93802. 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/ESA122437253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1ef6eba5464190d88a151975a9e83febc87b70a5e3ec3d273a0080cb3c2d54. 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/ESA122437307.
Piano's Soft Embrace: Gentle Music for Relaxation