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 0xd76b7f1e7d18bbea25034a77b77389db05676fee911ce456a7da0c45894b00cb. 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/d1280952-ed5b-464f-84c3-5894c37d26be.json and https://artists.proofprofile.net/proofs/artist/d1280952-ed5b-464f-84c3-5894c37d26be.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 0x3c4bd81cf8c465ff9626e5e62afb1aea31cdbe65c5af7bbd504d75a58de2e53d. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:37:33Z), 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/NLRI42200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4f961a9ebc0e72a8687987cbab18f94c58e55aa7b9c71e074966476268c102. 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/NLRI42300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a328b53435d38de0cf8823d0362f908eab29272098ac0acc3742999c5eab396. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLQZ12400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06eeccb3d3dea6c3bcfdcc99838a5a412665bc049a7b45785a6d909adf63acb. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NLQZ12400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f026d274f857420118bbec78dfa0ec6c25b26a87816c3e2a682534f28bef7ac. 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/NLQZ12400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a4f86d1ec006bf19a731f93a78465c28027a4608e83ef2edccdcd7d5e458b9. 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/NLQZ12400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79a1942c3980ddf06dd75e1cefd9bab6614d811fe662403c524838759485f54. 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/NLQZ12400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3b9b7e6fc44c1dbeedaedc74e23c33bef60fdd4eb4c6ddaa6868fda001648f. 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/NLQZ12400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b7d369078bfe525fa6f20f6b07529bbcc3232bbdf16b0c36bb3c4a949bd5d5. 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/NLQZ12400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27f156c604af16b6a5dc45b8a7ad3c37568e98433d003bfa07d934478a0c098. 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/NLQZ12400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3569110826b7995a4e0fae0cdcda4277646bfc21781f41e43fb256d81f07d4e7. 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/NLQZ12400010.
Reinier Baas vs. Princess Discombobulatrix
Mostly Improvised Instrumental Indie Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c95e0c20d9b904ac171da3dced1dc7d9f5c12b06144b23921d65afde801269. 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/NLRI51200002.
I Wish I Knew No Astronomy When Stars Appear
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ed281555c8b12a30f5d6013c90cab39d580ea09af10a3b40a3c96f77e857cb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLNR91300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5400c6e16f6648a41363d73aff002579ed0cc3049eefd896f3a6ff24e1bfe874. 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/NLNR91300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efa78bb4716c625e24fd993d16bb4c6c0047550c73dbfe0f590b4838d3d3eb2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLNR91300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364711ffed1cfb21ec188bb0cdc153d5436807fb99d6570a776b032774336520. 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/NLNR91300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dff25afb23db7708fe28b0680e0a3508de2c5216f820f16fe4dd534904eda2d. 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/NLW9T1900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd89e894e3895d632605357723a412ed2b3b3d14f4df49cc61e7586b53f51053. 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/DEM092400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc077c69b1bc02b5f0d2e49efaeb7963dbbcf1d0c979cdc0e48a15e907488a2de. 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/DEM092400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114eea3895330b801fbc9baed1a3c11057d056278a7a1f8f0b138663b75cc456. 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/DEM092400077.
Paradox Dreambox (feat. Wanja Slavin, Rainer Böhm & Matthias Pichler)
Yellow Heaven (feat. Kalle Zeier, Wanja Slavin, Rainer Böhm, Matthias Pichler)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a5ec8204e836e6d91a6937a96dc800bd9528c5a2f08111ebebefcdff692583. 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/DEE131826708.