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 0xac3ec57cb828e8aaf762c6f8a6c2ffef2c006e3756f7b1190e9dccbd7f6149ac. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f3ca9cc-1968-42a5-b1b4-229f9fa82b8f.json and https://artists.proofprofile.net/proofs/artist/7f3ca9cc-1968-42a5-b1b4-229f9fa82b8f.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 0xce1cfcce08e3a048ebc73e02532b830c7a938f614657c6ae12b4f7ddf4752397. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPU902401261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6a5bbe5ed95a84c207154d97c8cc84f3861d80ccaab9748748fdaa2ab1fdbe. 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/JPU902401260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ca2d02268561109837ace1fbaec08540c24a8b2b234ad754d47de664765445. 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/JPU902401954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc86d1e4110867ab81415ae91ed87b161155511c79f754dba54a1ade9845718. 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/JPU902401960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf078e8621210d638a4bacb34ba6dc2423e36b068250b3b21946bc4b879c09b24. 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/JPU902401961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227606b9c0ce1af4d6a6479cb59b85c849c9bf247f2a060be9504c231c926b4a. 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/JPU902402351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefeee9bd5864ea21eaea504ed659534eadcb74f3c6121fc1345d20c9e4eed597. 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/JPU902402415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c5e7bed8055d2456aea94b1289978340ca56429031636134facda598a8d2b6. 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/JPU902402382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1cfcce08e3a048ebc73e02532b830c7a938f614657c6ae12b4f7ddf4752397. 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/JPU902401261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0208270667b42ec7bd857d4f1901f56a334899b3add4d7ced8fd7326441c6b. 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/JPU902402485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bea080259b7ed01f6386a9bb38158a80865b5d5292f5048e8337398af3b71c3. 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/JPU902402486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2d97aba51a9935a84321483a28092d0e20e2c034bbed0b26d30cdac3ac2808. 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/JPU902402487.
Noisy Love Songs - MAISONdes × URUSEIYATSURA Complete Collection -
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8568d957a53f82dde62cd2a52961f3dfc650236444903b68494712213d678b6. 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/JPU902305248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7717675eacac310d0ac7b31c190c9aa7ad88c448efe315b9be7ab953e35f3f5. 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/JPU902403701.