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 0x5a0054b0967b127e7c0f33b0b9b843027dec9ba3e5f8e1477b09187231fd93dd. 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/f2fca7e0-fca1-4fef-afe5-fabd67d993e3.json and https://artists.proofprofile.net/proofs/artist/f2fca7e0-fca1-4fef-afe5-fabd67d993e3.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 0x9dc6e7de3ffe3e356400ac009317d5e0ec3445b20f98459f148faacb85344ee9. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QM2PV1656380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa594eb9dd50af7c59877dbf14efe0e2ceb60cc0e7bfab617281cd3c0db06ed. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:01:53Z), 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/QM2PV1656381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf678228a505afa7aa2102d059e43e16ee8e95d6d8ff843d81344d734d6021e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM2PV1656383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e8ff0b569965056d5ac39cc44c1a3131b91ab018edf51bd66990229b37ccce. 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/QM2PV1656384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c45ecca153e2181de9930da946c7885b529c0e852fd5d25e422f2fd4e683ff4. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/QM2PV1656385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce5f3c5ae1b5dd3c02557a6b45f01cae5127d4afcb750cb84460660792440c5. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QM2PV1656387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1f3f90423c52fa341235f937b9fbb335127a242892215325d4935cf91f6156. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QM2PV1656388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ebafc9552bf1904561a6cfc168a5986ee5778c923b4c2fd0aeb30a1e8be06d. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QM2PV1656390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f651da137c9d95ebfda37e6a02ff8af57d7849bc810f3947c45384e103302b. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QM4DW1760522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ddfab4b044ebc60dd4adfeb4ac86cebc0c34c89f5bc02073002dccaeacb70a. 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/FR10S2192956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd16abdf9c8547e17cd74f72fee3bce1ceeea65791e6b50067968d2d247cc4ac. 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/FR10S2120844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f272d6c8dc67064d7c64e2ed9352aa39817e5d2dd73b6261d25958a1e9a5ee. 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/USSTT2300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d450111af171c7ff3be8a02e1077d264e515d35d25003753c59eae021a56518. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/USSTT2300282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c5399ee9ca5df2313089f8b11b96713a60f2d70963569324ffdab9f68e65bd. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/USSTT2300283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f272d6c8dc67064d7c64e2ed9352aa39817e5d2dd73b6261d25958a1e9a5ee. 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/USSTT2300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf048201ae11997ccfe20485d9ef758f1c6c50b115586dcfd4030091dde7cdd. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:45:37Z), 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/USSTT2300284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85697fcd90bcaf7e8b77cafa1e55dc68e486d070b9ed29a4df8d1641fa9bc172. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USSTT2300241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2030907a4f72bc1b0a4bf9d0434bd234c547a414de0a0f90a363f8583a8ac9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USDY41980377.