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 0x1fc1302d009b67f4b479f4c6fcc8c6a08c4fb02647dc5f38224191201dfac433. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/160d3eb0-0036-42f4-a48d-327396702713.json and https://artists.proofprofile.net/proofs/artist/160d3eb0-0036-42f4-a48d-327396702713.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 0x6dbe6dce23f6b3d9555c6a24dc9258e26efaaf4d16cd63faeeb450e7c4953424. 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/HUC301500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f5ebfc39121cf6c3045fd1954704713238f1354af3167a9d5c1ddd2cdd9141. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:33:34Z), 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/HUC301500049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2caf1b8e85311e6e01b256d39b2052766c24429943fe651971f7b19fa921e34. 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/HUC301500077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc72facc6f4e250f7e08b8abfd0bcd26c506e088a61ce793783b289ba07c2736. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/HUC301500086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8b17c4e13ff7145ec7dcc86101fbdbcbb728e273b3b134e415f2bdd92ee7bc. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:29:43Z), 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/HUC301500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba6ba04f0e6c6a531db3520139b911918fbb9949c9835ca7cdd01c66fb33e8e. 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/HUC301500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d341968abf999256d34982c124e27fa894993bc5576843988ee3004268d0f42. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/HUC301500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3b985460de849fa71541384e6e0da145e6b68199e778104788a3a849b477c7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HUC301500109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7b02a7185626820520ea89ae8f0d5658b707754309d76bce8f7252f618d38b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/HUC301500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61055c8e804dc87bed51657f95cf117ab3de0058a21fc02217a65527d868f60d. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/HUC301500112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1a52d8d833741430493624e0689200f1aa952071ef808237ddba89ad4c16a1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/HUC301500113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963d382917ea9560ee8460fc0873ddddad2621119580b904108bb47163cf3d61. 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/HUC301500127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e972e85ed7050b9a2b50d8e7b155455f7e0e867966781662f2ce9aa6de38e70. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/HUC301500983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a84b7ca2a63f97ffdf679cd590bda2531aa8c1e98bb2c7fd483cd5d0dd7128. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/HUC301500986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861126d2c2e129159fde3739c438774ea326e740570a173b09681631b404c5d5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/HUC301500987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be25bbcc62b1b04ac7b56877d6cdc8449029fd422c311d373e3192164fb3e1e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/HUC301500992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f1e26e87cf4392423131049e87721d469f7bba86663178aa1fc1d5532d9ae7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/HUC301500997.