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 0x4ca252dca41edf5d1cd60f778581d34753aeb34e8cee3d609f64b8ed7d0afa22. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5de46d6-60f4-4cfc-ac8d-bdea2f65a8ad.json and https://artists.proofprofile.net/proofs/artist/e5de46d6-60f4-4cfc-ac8d-bdea2f65a8ad.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 0x54a6be19ce4c64c5cde2bca0f4959deaced6a770f7d9a8f2c6835db22c344230. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USDY41891374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ab65b81e380dff45381f7cf94798dcc30d26a08f961bba7626ff7ea02c63af. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/USDY41891375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ba139332a2fa751f49dac5829ca4955c61b05d6d4b2397124727541f83c480. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:22:27Z), 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/USDY41891376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b1f144b7e70128b14123d15154f350e278e4b131f92da587909d221f9d16de. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:10:57Z), 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/USDY41891377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc754abc4a7cefec9662746acdd46ce142d0fd2a1a478c094ad91148581a2ee58. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USDY41891378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3795898fdc3098d1dc727d1e2d0a7fb9ad5c235088f5f23e145661dec68c753f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USHM22063629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb1bdc1f6bc7fd1e6f830cd104fce5bf6d1d054b748526a9779a69408ee2681. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:44:14Z), 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/USHM22063632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3e496513e2d1cdbfaeee3642c41c51fb5f421e2acb73da87973ef6ae8782a7. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:33:45Z), 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/USHM22063633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a566f487676121306b5665f6c96cda5e8562e0fa464bf7694c80baa4fbac71. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM22063634.