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 0x758d297714a2296eb7f2666a9b3a1b7b39ee34cf4d69dddca381220c10a81966. 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/1c0ada1f-52ae-466f-9cfe-8b46e50485ab.json and https://artists.proofprofile.net/proofs/artist/1c0ada1f-52ae-466f-9cfe-8b46e50485ab.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 0x97db375eea66d6ea01635f0fed1ee3807148d67cd9ae85711d34ab5a5d91e309. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTH82104983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4451d3509ef5e22bff7e195608019bd330b37f5dcb908693df114a690524b3f8. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTH82185374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4e1d0ca8908361abc862e96a977509e05cd4c668ae90165210ce704a022fa1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTH92322722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1455a8bfd6547bcb72ce77c7f8431a3437851d4f8007c9d2e70887b8939ac259. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T07:36:28Z), 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/QM8DG2337460.
Memory of Lightwaves (From Final Fantasy X-2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eecc67dc3842f3a6b1adaf7020b430496c32aa3cf114ba8c8b94d0cbc2fbd49. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZTAZ2346735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4edf59c919b17a77c8c4a93831c88cc463f3d219143f71ea9de4414c135d8fc. 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/AUGBT2345167.
Child Falling Asleep : Thinking About Mr. Schumann
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34eb1d9aa9b61982c64f04b59e063d98f6ed692a190a7e53e7b72eb6fe0dca4d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZWFM2396171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4692f96eae4f6020fec0552ce0e7007c9a17c499b00c00450d54448a369d902. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFYZ2466541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c568c262b6ef16bdee8bba3499382fe227d8cbc8a7a1350023494d5a36bc1c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ62448405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394d4e7aa70e4a520d6c2db60709c93a984a3a311facd145edf785631fb8969d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES92462971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7a5612e1b23b0d003abc870d7c2a3a0c0bd1dd09c859133b4bdbd2ffc27a10. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES92469154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b64760e45f874f46e98424baa148b63adce2fbb847b5c5e51d62cf1361b6899. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES92469469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd28a6584c5fd3b5c47169c919945251e31ddee7ddf54858a784ca84eb2e8cb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMEM2480217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737e3915080f931f35a010d15db36badd00052d9b4a20f5b2ea9dbd60be7c502. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZES62535600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b4d6285954a0536a97a58d620eac7260bfefe34c691bee8629f9cc2808ade5. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7M2588450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ed3221be7dbbe121b93920f3bda6f6d06cdf49ef6ea26bd526269aa4150355. 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/AUGBT2357161.