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 0x2899e4fd7de1cca2cc813a9fcc59fe6639dadc627f6e68fc81ee8d9a68fdf132. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18276acd-7022-4128-8062-aa082d0af511.json and https://artists.proofprofile.net/proofs/artist/18276acd-7022-4128-8062-aa082d0af511.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Winterreise, Op. 89, D. 911: No. 1, Gute Nacht
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 0xa1c9af8d00e90326a6ae036d4a83d43d21395cba94c7e0f98a1efa04e9afb3ab. 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/SEAEA1944010.
Winterreise, Op. 89, D. 911: No. 2, Die Wetterfahne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13ecfe1b184c28bfcf73383f1a30c1d612e0eaa2fe6f6b178f9dbf208c3f8f4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SEAEA1944020.
Winterreise, Op. 89, D. 911: No. 6, Wasserflut
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf173c13f85c791e0e20414de0779c8be29d00ef03c286ca606fdf31d6f8b650c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SEAEA1944060.
Winterreise, Op. 89, D. 911: No. 7, Auf dem Flusse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50edd070c0a70fb98714d93ee9ff509320c9595b9ef6aaad201a68dcb3386be0. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/SEAEA1944070.
Winterreise, Op. 89, D. 911: No. 9, Irrlicht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9029b027b7ef7c8df5a067be031bd4e097cb664a3ed1e3ef5408290c402c142c. 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/SEAEA1944090.
Winterreise, Op. 89, D. 911: No. 12, Einsamkeit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239eed95a7f804a7bf74f2009d3b0c33444cc8be27d60337445ccb0a3749943f. 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/SEAEA1944120.
Winterreise, Op. 89, D. 911: No. 14, Der greise Kopf
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02142e205110cb17f9b83790765c9f851b5fe81558182fcc9e73ce47fef7c7d5. 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/SEAEA1944140.
Winterreise, Op. 89, D. 911: No. 20, Der Wegweiser
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61ee35ddea077f226f3bbaac4014450e5ecc7c489a2a485f6988d8494e46a92. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/SEAEA1944200.
Winterreise, Op. 89, D. 911: No. 3, Gefror'ne Tränen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb367457a72a0a453cc05fde81cf6e0ff051efe60dc27c12fe2bccea75b5295. 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/SEAEA1944030.
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
Winterreise, Op. 89, D. 911: No. 4, Erstarrung
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ed754f8d1d53a0adfd54647c265cbb73e3dcec04fe831c3c803bfeda2049de. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/SEAEA1944040.
Winterreise, Op. 89, D. 911: No. 5, Der Lindenbaum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3191d15d31ae9de1f552a34a013fc878b92a1bd6e1a229f52da88dd8d6917c60. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/SEAEA1944050.
Winterreise, Op. 89, D. 911: No. 8, Rückblick
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14839a19e1704a24c6d1eb98f7455bcb4f59c1dbd7db915992ea5fbb2c57d9d. 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/SEAEA1944080.
Winterreise, Op. 89, D. 911: No. 10, Rast
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83840ce162826223cc59faa6dd0530ddb26f94b99e5fdbf523769d6ec04022a4. 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/SEAEA1944100.
Winterreise, Op. 89, D. 911: No. 11, Frühlingstraum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93cd2e4914ea20cacbd8abbc675b338e7dda3abbff95206af60cf9a0d91fce3. 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/SEAEA1944110.
Winterreise, Op. 89, D. 911: No. 13, Die Post
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77dcd59c7a8814671dd5aabd2d89bba9aa1a7fd86daf1850a3e1df244e7d2fba. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/SEAEA1944130.
Winterreise, Op. 89, D. 911: No. 15, Die Krähe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22784a9c00071b6e6b4cb98e4a5d11c049ef52ab36326836281cb49f6b9849ad. 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/SEAEA1944150.
Winterreise, Op. 89, D. 911: No. 16, Letzte Hoffnung
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b2c0ea3bb7d4ed955e003ce066771176f5f0611b39ab79397e1f4c0899c1de7. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/SEAEA1944160.
Winterreise, Op. 89, D. 911: No. 17, Im Dorfe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51c01990e6775895461d9b27ae16c7d97c48dadb99eae35a11d873e8c22b73d. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SEAEA1944170.
Winterreise, Op. 89, D. 911: No. 18, Der stürmische Morgen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bc079183d7087da57da7e57eedc577de4d4fd6b2de736ac94435cc4fb844a5. 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/SEAEA1944180.
Winterreise, Op. 89, D. 911: No. 19, Täuschung
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd9317b8ecaf2baef934b9cdb7696e67ca4e7cfbc7ef8474820dd798f910dd7. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/SEAEA1944190.