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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb4a12d7d787ff60960c978363e9ae211584c232308c761e65188a74cd9c84c. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e7e0b2a-9512-42f9-bd68-7fe66057dccb.json and https://artists.proofprofile.net/proofs/artist/9e7e0b2a-9512-42f9-bd68-7fe66057dccb.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf97e49c87169418c0669187b68c5ad686b5d108165ef0aa0dc04169341224af. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZWFU2460730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd735053a155b95e5420fb86befc2b6f215aae795acf7f4b2752aa19bd705bacd. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZWFU2460732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43af83964dc0b0227ef48d6e555d764d4248b94bdeeba570b5235c9d61eb46e. 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/QZWFU2460734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57470cb627178bdcb14394e39780cda69f37cb2e4f6300b0431ce130c638abef. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZWFU2460736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06037d29aef1b13c8967aa9a48d0dde5163cbcb43aa789f5b56d3a82faefaeb2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFU2460738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a372f25afa0deb0a7c588bff0ef8ef65604902e170278219e59eb61f479993f. 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/QZZ7K2435142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb58c2f18bb1fa7ac883fc2be8a641d5e2295a6d5d46cd6dae1470532e5a6dd4. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZZ7K2435143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d68dd98e2c248da427e7311c05685e394236197df48ae52497e96991dacb94d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZZ7K2435144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2530f01708f3c4af1106301b3ee5add5cfae16fb3d28a61d17ca2a392edd7d66. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZZ7K2435145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25359fb48b68cb79c4a2c8a8adc61e3f5a48b419a5ae185f0505a5e3ce90bb4. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZZ7K2435146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c422356dd6c91b76779a898e295433ebe8178137f6dc08dd65bc035ff482f2c. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/QZZ7U2456797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d3d4500818a9995a8cfdab43e5c6cbfd630195806fca059a7af556936f9cc3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES62530408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7c04c3f0748c36afad6a2950376998106473405a6a291f4e9f8221da4fe1c0. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/US38Y2533426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efa767193886761ba0d8521ce86dcd11a71843753e7d514a7db5c4a8606a5d5. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/US38Y2533427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1608e235cf0e601c8813fce320a74f4fb43355b61d86f96bd776254b4b15a6. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/US38Y2533429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267c019d45ca07caf2f0db0a98d00036646018daecfaffc5ca5b82df8cc89405. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/US38Y2533431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a607f467cfa3a49c4b06635f6f621419613d781d09be197c71d90eceeba120c. 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/US38Y2533432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e1da4b293f722ec726e34625ce44ae6ff993be8de77d217463ac10088d6d21. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/US38Y2533433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6edc2d8500ef3e0ee168fa86c15f025499f69ea38d7b11f8c6fce02890b3f67. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/US38Y2533434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd1c87dc570ae39670a761d9894b7ae2928150ea09e98d364a45f7fb709fa64. 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/US38Y2533435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b9cfc989e616e06c94cd3651f6821cc13bd60bba65040bd199037ebfc49e09. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/US38Y2533436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51647d958603a99f413805f12e9b69cc20942161b13f425d2418a8740768a6a0. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/US38Y2533438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb2f89dde48988399ed6cbcd6d8a273572e08b9dcedc25794225d598bf5b0f5. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/US38Y2533439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe679a633cf949cd99ebb1657e9cd4110537e230003b56712440caeb881bedb3. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/US38Y2533440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7edfe08bad7ffd535b4cf38f7916a2ddfbf46f03ec0bd3c5f0aa1625ecb1e06. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/US38Y2533441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d60b9339d3fe9febf3d0bb09fe2322c343f96ceb38a94263797aed3e0355385. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/US38Y2533442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3551e641de73c96f09bb23d5e509303dc69e36a08ff74254fb40ddeb2ac704b. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/US38Y2533444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8a3e361ee7263819836cb497d8c825feab3ca153652beffc829ae3c8c7f91f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/US38Y2533445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d84470c545d44515db4032dcd4bb5f7e3191a155e5000c0b96b88982cc21fa. 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/US38Y2533446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a76e0502c42a7e22d32b84b47a97910358292fff5c6085ebfc0ef2bef20781. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/US38Y2533447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd192ddae63bd9e7e2ce1252f131bcbf1282af8d14afbbeac95f6807e787c55e1. 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/US38Y2533448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1ba3fe718f4c4059343a8c3d39632cf21058ab6dc7998b8a84be9fc14483c6. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/US38Y2533450.