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 0x5163a7f28868724f62b54565081f9555b1b66a1d6dc97d6a2dc24119f4c08907. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80f68179-d19c-4ff6-8119-87ed2433cbd0.json and https://artists.proofprofile.net/proofs/artist/80f68179-d19c-4ff6-8119-87ed2433cbd0.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d6d591123d60cda3ae6d0ebbe28f21a3bc784a5cfd577921bd4099a4c7dfd7. 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/TCAGD2296794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7810e64860fb61755bf7a15e96edf54a95647f4fcc4a10d9a98cf2863bbe74. 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/NO2DY2400444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4de9fe381605d9a4bc0af18b5b6dc2ed51cd1dde836437da8e7b7bd1f73f4b8. 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/NO2DY2400455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d256d447bfdb2bc2403ba6f0779d706b2366e1dfd09887d1387c4608f0dbcfa. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NO2DY2400304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049044112a24b5640a233cd8fe3985e068d0de7987eac9dde63e3cca814c7607. 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/NO2DY2300701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21c11ab8fa603fd65bc16c03d12f59c4586958e6cf9f9f9563eba8d14821866. 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/NOUM72300466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d0480eb5bc562fd85860af6e7114a659b2ae8299c2d16db68f8ed35daa4c76. 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/NO2DY2300522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335ac5139c465d5e9ce7ae1c0c4ba0d91653156dcabe3410c40a20999182c7ce. 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/NO2DY2300499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7db04c53009e926e8825d3d277d377b49e8d0de0c2216e93af8c1f44aed41a. 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/NO6K42201217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250aa604a40138d6b9d89211afe709c15a60530b687842b18f0a15850916d7ce. 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/NO2DY2300452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad6129ebcb74eca0dba79d210296a3ac158ad6f18e808afd058259169fd1815. 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/TCAHA2365638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559baa4fd38866982960b11b1612336f4f9ba5ceba4e57ac0449df1a032c2221. 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/TCAGW2305622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09850a9266396538cb32544e3f99ddffb302d5df4316e074e57e871855291c9e. 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/TCAGT2344535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd3eaa1634e1db0e062a710715bb99eea9b8cd98ef4b1585c28452a06694453. 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/TCAGI2281941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cafe9e31ee161a68e5b94fbe957ada01d9306b802821a8739969e0b64888faf. 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/TCAGG2229574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bcf406d98afe081c0ebb6aca774c9050b62a6791aac8f805d8401b0dd72e08. 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/TCAGE2239541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10599549fccc931ee261d03c4b648d3e9c40f01ccd29633128a87812d3c1c7ab. 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/TCAGC2235354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ee86b49b0d9123754653ce6e8bbd59a3218a8b334bbed1f45abfdfe3c9b52a. 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/TCAJF2538624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5e543fa1b562ba7b9483ba5b8923307458e6e5ab59b777f0b978a6d328ba95. 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/NOGTA2485710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9018917c9b13ea5d98668aa5d2a549f68290e458b0d58f9caa4714d7b652423. 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/TCAIQ2461889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5d124ef76f4b1d8c28433ae631a437bf0d160661853efae570b1b8e17903d1. 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/NO2DY2400516.