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 0x2e847b9497d73a4bf87df849ac6a1fd76c06e67e5f9d1d9ef34909f8ca08d01c. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5462c901-25ae-459a-a748-32ea59653b56.json and https://artists.proofprofile.net/proofs/artist/5462c901-25ae-459a-a748-32ea59653b56.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 0xd96593ce7ec178e671b8bb4af437459fa10505a6f5f84e5a4ddea2e980cd26e6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARC571700856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a46d04ff77b7289149261df6dedab6b5bbc23e02940b098acd2fb88ac260fe. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ARC571700858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2532f07811cc257c506097913dcd7c5c3524045d26324f2551d129ba491b7d. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:31:42Z), 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/ARC571700859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c75da0d6822750cf20dec80a86d3b2bc6962c260ba3ac62054f8a54a14e7578. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ARC571700861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7757e696a40ed7c715f27661f926c0dbe1e77fe2c569ef79da97b58dc24f48f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ARC571700864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c27601b371e9c47f710bdfa3bf6c1d0e74d77494e351f7f170850b5e7925dda. Chain 2 (Bitcoin): anchored in block 957534 (2026-07-11T07:10:38Z), 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/ARC571700866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9e43929804332dc4cb11e250f846f9c8974670509a39253c0083b7787b5401. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/ESAAI0259645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aacda2450646b10fa730afc5ac89e1d6543fdd469abd95730f4ad0ef7b7fb14. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/ESAAI0259646.
Matahari Collection - Special Japan Edition