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 0xde84619fc5f1db16a99c96aa76c41f2acfee11f50fa95814f11fe5a2e9993a86. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/802755ba-3e53-4e9d-a776-e082cc987b07.json and https://artists.proofprofile.net/proofs/artist/802755ba-3e53-4e9d-a776-e082cc987b07.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 0x304f215cd763e774c210591193ab3f863c3f26522a6be697ec74769a44af25c2. 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/UST8K1663427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5269d9b76f6596023eec806bac8826ab7a15584ce0709de28d39efb8bb16abbc. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/UST8K1663428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c388be681789f1342f534c11cca1c3add09a73836a854a0705d5307b0273d1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/UST8K1663429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd427a142f800088271a6ef85b6343b1ab66dd2c14055c4719c67a056c3ea6d0e. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:18:55Z), 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/UST8K1663430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12871a988c562b8c11f98ce88eab539a27e0767baf609a1fb79e254dfa4dc312. 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/UST8K1663433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa793c3c15906c510b59e7b51bddff42a8fd82b5e57c570d481af526f8dbe0b58. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAAR1008058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d94bf70c537f83de481960a2b969caeb5489de81e321073afcf6bb927fe2a00. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/TCAAR1008013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8286ea3abd1f50d074695fac062ceeb7325303c06492d108d547dc5a00a31c. 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/QMEZE1761897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaeec8809f26e49900013a5c1ef1220403bd2f2a28ca3b299614663ab6773556. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMEZE1761899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba8c436267e0666441a861cdaa07cfc44481fd441436a9c7f3809ad7c7d38c0. 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/UST8K1663323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e94234e93b6eb87a04f42bc4fd65945749b8013adaf5d60082a967809bd46a2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/UST8K1663326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712a314dd35ef2fd3f02890c8920cf1295fa7ff8c41dedd1ac16eb4452e2a8e8. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/UST8K1663327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244ccbbf213a6c6073e5843e82268bfb2eb0bf5317489f8797ab8ca2207d9303. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:00:25Z), 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/UST8K1663329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27de084b19c4099bdcbe092fe42cd203822476e9d82e972f5fe9c3199a8637b. 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/UST8K1663330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe291e1e6ca8003ec95b68d10bae0670da7d84e131482af698aab9d0a326c03eb. 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/UST8K1663331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54541ea8daa90188657f8ac36207fd3ad03887af3028317303594a89df18ce5f. 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/QZTB62268869.