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 0x2e98c0a10dacc7da8752a45d74573d2f2a616f3293fba4db1cb863afcf9cedd9. 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/dc09d6d9-30de-419b-8efa-0ef27a30004a.json and https://artists.proofprofile.net/proofs/artist/dc09d6d9-30de-419b-8efa-0ef27a30004a.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 0x857aafbfdcb32955710012e0d512c7a0b274d507e41eef492ba2765475ec9647. 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/DEA372009408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad01ff28735d2fa3a84c07bdf59da25f320e57f5cafc109fe94b9015ccc7a79c. 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/DEA372009406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7691e89782ccc077a9e0b0acc67b75ecbc2be6e5b2e15e0a11b07dd9a79dbc. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:34:33Z), 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/DEA371901567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce04d17fc089724a2c2f20357f43ab5e68edd4de9c2bda33640b0e968070fe83. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:12:28Z), 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/USHM82271938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437ed4ba7ef22dd7fcf310fedd59dc0d6d7d47def96e4996eaca129fdb85d148. 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/USHM82271940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e071021518e8c3d0bc2716c1410157a4c00dcba7aab74a9b53584776e25c4ef. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/USHM82271944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe847c0016d9e03589601feb1265afd98e87d0d870cb39c95c8ab4487be098be9. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T14:34:09Z), 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/DEA372009414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac73ccdf5a69861dd0bc728a5531f1aa879f03b34afa18de3188e60a5cc85542. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEA372009393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e69fdef978ba5d8279bc04f0538f548b7f4a8c502bc8cc415249169cf8b3886. 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/USHM82271905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d07c53a60fbc882a37ad71fb8ac98cb6083278ceb903f2f56fa65426c37efda. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:17:45Z), 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/USHM82271907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5548c99bdc37ebc49a3c52d63c5e7e7401f20df7d2752f3b4754dcf1ef991fe5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USHM82271909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b333a1a62742322c663b6b536c4c457320a04ba91d468d1f8751d2985b1c72. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:52:58Z), 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/USHM82271911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7335126883a5ee367b75c1c9ba7fb8625baf66341c76afcd56991da4245bd39d. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DEA372009402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09b278d814d2db256ab0497a6bda3de104da20fe737ff04c2d7772509f29e13. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/DEA372009396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc77b793ed09edcaacea17c48172507b4239bc08e9ffad8c6c65a5a7cb0e831. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEA372009410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7636f78834a3859a1669a0540f84f40083a8dab0d8c52ceab261f9d80cdfc128. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:01:50Z), 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/DEA372009399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7898474e9c47da6fa6c8bd0dec5f58ec81c8bf53230dd2fd436b782da69a2e65. 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/EEUL32207058.