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 0xfef594a0d7b8af20a509e618dc2aa74713aad3187c8d92b2120276f83badabee. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7405c1a-892f-460b-86bb-b79e1a0e96d9.json and https://artists.proofprofile.net/proofs/artist/e7405c1a-892f-460b-86bb-b79e1a0e96d9.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 0xd714e3c0690dea6d20079396b26baba0f9b6ffe1e62491b5fde490df1e44c5b3. 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/DEHY11200688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e7ae483c6a4369c25ce6df4b8d6c6ced8c38e848fd3e507ed61e6141a60db5. 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/DEHY11200689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2692d5ef6d5f08e1918a507f6be5e6bbf63b84b915f1b4877f8c9bde5d0ff2. 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/DEHY11200702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307be87982b1551072f5798362ec7df94dd729ba5f5caa6632a99ca1421c0046. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/DEHY11200711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f57c63d1cf610ab746bc1618a41c747b7a85baf3adf7dfaad6403123e44cb5c. 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/DEHY11200712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee054994799c8c084b9d6057d3dd9eb9d005ca5684dba5aa6fabd5b300a56e33. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/DEHY11200713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7642b26960d1327f3dd6ad3b2297daee962b2a4667a8422a461d0322b48eb6. 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/DEHY11200549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06bfcd353833e3f5d7ef4ad0262ea7d64d563cc27dc67e286fe93ba61f98d415. 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/DEHY11200550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5a65d970d100ef780dcfc65457356361842256ffb890bf38300b5365d7d530. 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/DEHY11200551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8fc1bdc29c0d9f5562d4ab18581cba14870592f3accb7498eddc64a18ff2ab. 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/DEHY11200663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1947a39ff91d78e3dfc9711db9560331d2caebef3097d62de719d8de0f3254. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEHY11200664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cc511715426d2c84517754e4430d0791c8d3455c0453ad12516cca6af814ae. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEHY11200563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d55fa217a0c67f8ead9d32799ad573798363f56e1b4c5bf4221c49e86a340a2. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/DEHY11200605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb876931b206d738bedbbe649ce0439529c938b23a4f42f6d3b7f0ef8ed98d1a9. 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/DEHY12001932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b370288e77b158702df9cab824d05f1b6572c00940282c32e039655da95892. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEHY12001933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e27c5930f99cdff0b1a98e05df4a103f0316d2d9ea6ff9d3bfe9930f04416e. 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/DEHY11200569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f459706978b326db8478953070ec9ba4b21fb5318aff37500e80552901ee73. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEHY11200570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c8172c45adbd15d4411c372dce5cf670cea21813b7480339be93571197c08c. 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/DEHY11200571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e85a3db41d919b9828b13f021e3dcfa76a580d03565016857e47e614e0064a. 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/DEHY11200595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3915df874a72f85e0d82b090836de4b991867ebdb5fc7a6477cac1d9124f7413. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEHY11200597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac2299a972c5fd04f3f8f7644bc562db130c9ac53107dd18ba0fd0651be9459. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEHY11200594.
Rondeau virtuoso - 'prince of Denmark's March'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a31d3c928892a33b139215143cf1c138cc54afe396aa7b142ea5e807baed3a. 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/DEHY11200614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e7f80aa8e1b3623c0b51805658e6e182d5bce46845c228d18c2e1bc8cc1f98. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEHY11200611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b5d88d2877ba9e480098a83f42f1fc57d4b67a2064cc6fc0ae2af9eafd19a5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEHY11200577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f57c63d1cf610ab746bc1618a41c747b7a85baf3adf7dfaad6403123e44cb5c. 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/DEHY11200712.
Romantische Orgelmusik zur Weihnacht mit Paul Theis