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 0xf3b8eef51d5a6277865c9f21cdd68cf8be4e85609e869a51530972e5a5040c96. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a73f4d7-689d-4ee6-afce-d34ce69128e8.json and https://artists.proofprofile.net/proofs/artist/3a73f4d7-689d-4ee6-afce-d34ce69128e8.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 0xfeaa13bf8e2c83c5406dd9572761d544e876053c2f48ee5cc77aa30c538d9d2c. 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/US83Z2331475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a8c6b22fc91634be9b2639ae8a09f74982a80c08ba749964280476a9b31557. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/US83Z2335333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabc17fd28456ac89e64b705b8c60949fbf6bbef8fa74e408dfd175addb3f4ef. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/GB8KE2319771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcecd42135ea7bee8e5eb7280d4fabb9d07adb9173c209c39878354c420ef36b. 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/US83Z2345464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a826a47a488d25f632a6866a5b663c8e7a8761e4f3f9a607879b180d4ec9fea. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/GB8KE2327341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe037b6fc3aed7b3ef249c6d11b5e837ef6376417d33cc42bf72f2122ee9be3d5. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/US83Z2462481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbfb68d759311430e7dfc65d9ba01f717d4f7e56215885b1a7c02486f19eb5c. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:10:43Z), 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/US83Z2465434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7638bda21fdccc32d13fb130b90271ccfed05dd134f532fb8753945ad600ce5f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GB8KE2407133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f6d69ec28a32c88fbf0bbaa1f22201417160358983d00053e49618c16cbef8. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:03:45Z), 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/GB8KE2506650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d664fbaa5cd1dc4834b5ecb185bcc1e77bcfb8a816ec0279cdbcee2c8f232ac. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/US83Z2517043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f56f6f814acd54e7bc1f337b0cd3c835611639e727f434f54790dac09abfb3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:08:22Z), 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/DEPI82513444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5831a971385a82e0882dab78e9068923879e53c540fd6e53e3ba3acaa5fdcf5c. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:31:24Z), 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/US83Z2561170.