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 0x60ae09478c952ee010930f70ae65774e1939582ca8ef82e96975caa74c25c712. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/766c420f-30ae-4ba7-877e-cdecbf5b0682.json and https://artists.proofprofile.net/proofs/artist/766c420f-30ae-4ba7-877e-cdecbf5b0682.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 0x0d883e92e6ab5b6b7ea0c92ccbf06484be979a45a7ebd6347975de1ff7f38f77. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USHM22308982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600e715f47911eb989afe8b205ef69111b51c01dfe111f6e3e9719e1de73d3bb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USHM22308983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e430b3daf717e6df8d37012596701a68dd967e1c6e275a3ec7d8c3ef12e2d2. 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/USHM22308984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd0acd4fd1ace95cdd8db9cb46dd86c8b486112befc8d3ae1d23b783fc65d24. 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/USHM22308985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908a620f592690870773b7e507160eb6e0aa5ca2ef6db14d44ebe9c5e28dbc12. 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/USHM22308986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195c6133e2f819e4cd4df04d657fa696c81ddbe5d8bccf98847707733eb65931. 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/USHM22308987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a2de82e0a0bf06c14dbf18f401796de0a80ee7f3fdff75d7cb65a896129812. 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/USHM22308988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d7f1af5d6c0eebe42cf9fbbba6bf7e2fb1eb55da5ce8c2bf00d0061810abae. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/USHM22308989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069cb199d26c99646ac0f44c35f38f8d4131303430d6ba29638803b747c57e52. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM22308990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a076ff3e922dd071df6844dc6d33575eb37c9662542c63b1059d057fe3ff8b. 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/USHM92424448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x483805885b3265aae2166eb0e1f58f86d25ab694cdc2e9fde2d7f4aa9598baa1. 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/USDY42324411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5565e1be276d75d782d2ce94c6383612e436db1f0092e59e832e4cfb281f00. 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/USCGH2382990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd856ff9618e3759e242a3fa514a595e1ae436d3323b745fc77cd176adf69d360. 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/QZNJX2280934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4b370f7a4676230f62e2331fd518902e5b3384e2ba439898318bc67184150b. 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/QZNJX2280935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab4e8e28536fa9f2f5abee2fd7dc37a117d515088a41695c757c203b845e456. 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/QZNJX2280936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8fa20252cb7107f861da5e07da6aa4535caf7bba1b273091f383ee93bbd43f8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNJX2280937.