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 0x974cee26aa76cf5455114fb00548771aab3da7e339cb933041a7e0c311dd70c8. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7c04fed-6645-4829-9daf-458828283046.json and https://artists.proofprofile.net/proofs/artist/a7c04fed-6645-4829-9daf-458828283046.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Wunderkinder (Original Motion Picture Soundtrack)
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 0x7a9d0f1ce2aa774639a3b8200a1c02eecd0fb4962fedfa82bc08b98c8c3c68c5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DELJ82071640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe197a024fcc6cb700b153eec87f5bb646a739ac80f63e09e3958e82d322e7a88. 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/DELJ82071641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ae4600a6a8e2b9949cccb6a2c553fbfde7604ab1865628d2833acf663547e7. 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/DELJ82071642.
Larissa übt Mozart (Piano Sonata No.11 in A-Dur, K.331)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c940d2059aa9fa431f64c3c61ccb140efcb72be55438ded1ef7f0f34bdc473d. 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/DELJ82071647.
Hummelflug (Das Märchen vom Zaren Sultan, 3. Akt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f0ee77ec5baef47f1ad5c4b0bb1f7bccccd40234d622e1f9710d3b890ce5a3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DELJ82071659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf782be4c0cb545864d819534eab990db34181e8ed7a1deb58e474626abcb812. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DELJ82071662.
Ungarischer Tanz (Ungarische Tänze, WoO 1: 5. Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ba5b789f3e9901611c5181ec860838198cf4c1d5015738e2d1fdf7215f9318. 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/DELJ82071644.
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 0x1868257a44dfbf211ba0f5a5c9cf78f27fd4c3617cb5e839023d440f7aaeab3d. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/DELJ82071645.
Schicksalskonzert (Violin Concerto, Op. 77)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20be53758332f6f3495eef410ab795e87dabd3c850b61c0782104bd1ed3caee1. 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/DELJ82071660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9da6f8feae4fccae3507851adb6c19e3fb40fd787eab44f96b2281d9d945cc7. 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/DEE471100225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3895fb77728bc1e80c6da3219907d0ef8c6975cd58668a3f2674000ba492d3. 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/DEE471100232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3895fb77728bc1e80c6da3219907d0ef8c6975cd58668a3f2674000ba492d3. 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/DEE471100232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3895fb77728bc1e80c6da3219907d0ef8c6975cd58668a3f2674000ba492d3. 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/DEE471100232.