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 0xe5fd7228710b300b7a222c99e6583eddc33736c6d7710a070c9be602ceb1256e. 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/60542b23-701e-48bc-97a1-8e1ac24969f8.json and https://artists.proofprofile.net/proofs/artist/60542b23-701e-48bc-97a1-8e1ac24969f8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
De Meischter Eder und sin Pumuckl, Vol. 4
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 0xf14a79e622aa6a7369f28c74fdb3c37f7c797a521a3e3915991207c60b7f70cc. 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/CH0042201022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80579829257bfa5a0f7bf63b533de9d0c3b44b8797982a6150d567917daed10a. 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/CH0042201023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5104f59cbec6b25cf2d913daaae966e2a1d569347ebea9c36c109714ddbb84d3. 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/CH0042201024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1624b5f2d74926a302edd49110622a18c44ae3b1e543d297389cbdd8d3871d0. 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/CH0042201025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a99fadb31f71b1589760b9ee24c059a9d6ef0b7e438c6d95c0e4e7d6e965c5. 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/CH0042201026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046ebccba888c4f83e18ed85a61ab4550199bca2c8452ba6296368724173af1b. 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/CH0042201027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cc683d8c036b53ea608c907608d93f9f7ea586f1fd12711150ceaa00f48d79. 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/CH0042201028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43062df24b5993774f09254e6fc0b3211f9ba3340b3643005a07d14ed982f040. 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/CH0042201029.
De Meischter Eder und sin Pumuckl, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e37385d5436a137f461b470696ffda06aa8e890d48e774a4dcffb58b82be6fd. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CH0042101001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21626d7e72f0a902a131c7286d19acc8d633e1256593b06ec762b3b9936def2. 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/CH0042101003.
Es gschnitzts Bett: Es isch natüürli scho luschtig!
KAUT, E.: Meischter Eder und sin Pumuckl (De), No. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb16568a3b0d7d17e2b5d2b19eae091eaefa3c4778e0eb84d2f19260b1f53cce. 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/CH0042201281.
Es gschnitzts Bett: Nei, nei, wott i nöd!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2d5a043c2e36476dca4178180da4ce4849cdee90b5930287b678d805a712c1. 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/CH0042201282.
Es gschnitzts Bett: Miis Bett! Miis Bett!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ade2c63b08a46ee543de2d20504ae16227782ca8ae6f1f8c11240658c598059. 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/CH0042201283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d90a21f66a9f088540a6f54025419b702a64d8961a8336ed59596df348e89e. 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/CH0042201284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9961abf67cdee4a31084767c294974053f8944620f4c7f3f089dbc9bc2955df. 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/CH0042201285.
Es gschnitzts Bett: Also säged emal ihr Schtriiti!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a8999272ad3c73b3cfe330422bddd119b47ff85550f73e909f1e87791281a9. 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/CH0042201286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0119a39b796eb38027d4ccb045fed761fe6eaa89d40d343955b8e6a94ace6328. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/CH0042101000.
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 0x7a48e5e343a68d6912b39316f35eaffa61665d6cbc1cc9777f0216a0b8a670dd. 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/CH0042101002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36236cbeb83dd744eee874245515bf67a534ea0daaf7417c4175cbed3288a53. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/CH0042101004.