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 0xc5e6a7549b500596d693f5b38d67ed9a7f50cceb20f91e889ef742fea92d0f77. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5787203-9d25-4fae-897e-e8b2fee2de48.json and https://artists.proofprofile.net/proofs/artist/e5787203-9d25-4fae-897e-e8b2fee2de48.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Robert Schumann, Uwe Kremp & Mark Anton Moebius: Encounters With Schumann - ...tief Im Blauen Traum...
Im Abendrot, D. 799 (arr. for male choir)
Choral Concert: Meistersinger (Die) - Schubert, F. / Silcher, F. / Kreutzer, C. / Nageli, H.G. / Trapp, W. / Grell, E. / Vulpius, M. / Kienzl, W.
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 0x8159b022df3aedb17f8905df435821d94b56d85b5244b42f2bb02f7cbff77b7d. 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/DEA550718824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba9dd815d49cac986aa5f19ba9c31dcb4a277085e936a9fdd255384f405a5d5. 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/DEA550718825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0bef58170379e0ded3a5a206cc7c6e004734c84d79a8a9e704a0016703a470. 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/DEA550718827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143a1cd1cb8f449f2e5786e44655cf5252133d0a5f9723ae2d6bf0451aa0b4f1. 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/DEA550718828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0caf97643b52e3490705796eedb15048dacff26b9ebad89dbf4113c2358ca3. 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/DEA550718829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08ff291231c2aef2625e40063527e2a221c2364499534ed96ae5c08f98eb24e. 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/DEA550718831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb1d11d32ed74b9b0d2e79594b67844e89aed3b4b4afe75169ecc2b7fc76e25. 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/DEA550718832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e960c0d7026d019bf5906f4621a2f3a6ddd7a0c3ea84ecd9f2b4da3404de68. 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/DEA550718837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d104fea5903325f766b33328478829ba3c243177a040ce0b8ae941451fbeaa7. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEA550718826.
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 0xacf376ec01efa012f14c1766406b5985b281fe6a14417f931a4220204d698343. 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/DEA550718830.
Der Evangelimann, Op. 45: Selig sind die Verfolgung leiden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb2d31d3dcf7c45102c178f928895b975e59ad20b18a9f5650bd624116109d6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEA550718834.
6 Songs, Op. 48: No. 4. Die Ehre Gottes aus der Natur (arr. for male choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d9d19ee3b0d770e7fdf3ea35873a07807dd505899021005a2b2a836075739b. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DEA550718835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5945c2a34317fcee403b75a2ec3f9cffd3f6ae772c3af57e9ca45e3386e784. 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/DEA550718838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef4574ca68700aa04e1d7beec0f3b9a0413dfb3fd365b1bdb93e9f1378db0fb. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEA550718840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa637aa3980155795681fa8515846c8d980f3550ed4ad5ab41de8c7a5d90e914c. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEA550718841.