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 0x5f6fd7e7459209fd6bcab4c5f0997200856178c4aca43cb575a0080642b7dd6f. 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/3a04a64a-f9d7-40a2-8490-8eda9cf040fb.json and https://artists.proofprofile.net/proofs/artist/3a04a64a-f9d7-40a2-8490-8eda9cf040fb.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 0x400e3e5be4e92a3322b599b266b65912fddd853371ed7f522bdce1a7a07705df. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:24:19Z), 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/RUA1H1805210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9010f4b6ce386e4ffce24c7b2ad576d02c1e59cb7626af5e4a2a1a41be346a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:50:55Z), 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/RUA1H1805209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25b49122030f253bd958287747e0255f8c574d256b0e9a5ef2c06f0f8572e66. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM6P42061669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba2337137d3a8124afcb0c254c1ab9968ab561b2f02c4c7ba5b7016ae9883fd. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:50:47Z), 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/RUAGT2306460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988ab2cd93f4098ddf504ff01565f4ce1ed69f91b7ab2bf20d0976be2ab08f11. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:01:52Z), 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/QZ5FN1964064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca969d833bd489125fdc0ebf58cf571229b94c1746ba1fd7ac7298c5eb85f087. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/RUAGT2306151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f33ad936b2926f34d399a49ac10f976464b594070616d40791a0552c47cc7be. 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/AEA0D1869054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c4430d793aa87a7bfab2be798daa18a362ffcea3f239e3bf616acee6b375bd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/RUA1D2509016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17c27a964e29842aa1cb4873fb5e2e75c87f49caff83c88d282c250b2ad0eed. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/RUA1D2500638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94222ee6faeed8df173aba71c5a131dafb7772060a060bda9386b3096ca8a9d9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/RUA1D2509018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1036695d8bab22c68269a6aa1b318c1f6c86fab7635843a18bd82c94bec411. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/RUA1D2509020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6382b3056c2fbc70cc35e94d13d98a1b67cf27b86a62ff979f1f12efe2aad80. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/RUA1D2504366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe4f688b8f1577857b7b895eaa289d7eb037382ec93ee497b4408f621417c99. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/RUA1D2509023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41776d38c1ff871c4447a2d8b5134f89ce7f5b02d4651407dd4bdd74873a9a7c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/RUA1D2509025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0846b7d2095092bb9fd9e74efd057b191fc60625c54bb72ec938f97b24a510. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/RUA1D2509027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6382b3056c2fbc70cc35e94d13d98a1b67cf27b86a62ff979f1f12efe2aad80. 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/RUA1D2504366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b146766f846af537b2f66f143503de18530f4131dbe7505e4f9c2455090901. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCACJ1566701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff1f18ee34b4a1a877ee298074da4552ac7e0f534826e17bb41d5cfd5745c15. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/RUAGT2204622.
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 0x65cc6eb1bb0c1142a4805afb590169edcae0d2b3fd274f1afcb1d23b7e38f3b1. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/AEA0Q1969705.