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 0x1a311011a7c66740be64c1e6f4e129231c2bf0d9650dc765bc57901fcb17624d. 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/7dc96ec5-4543-4312-89c2-eef98b8ce222.json and https://artists.proofprofile.net/proofs/artist/7dc96ec5-4543-4312-89c2-eef98b8ce222.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 0xdd3b31af79b928a575288093867828ac92ce0b42da9b696e3b9b60efa764124e. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZNWT2143157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c36767e05e47fb56c9f216030a5852b02c9ffc9683d34e5193937b903b5205c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWT2143160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec3ed1207acb078dbdb574e77e0f32281c663e71ace5a95f8a263d3e7da6c60. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZNWT2143161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb662a99229fffb096af83aa69cc34106f7b656c13a162955c4dad05c730a727. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZES52237928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163cc68de0eb96703a67ccbcd073ce1d8ff9b01a2975af9ac43792e2159a1de6. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZRP52230440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4990857850cf1fed8f69c219140ec95361640559156b072320d44fb1548cced. 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/QZMEN2345935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ccebf63d5760b36521b76ea3889edbe8b4bffd5de02355582cd251e87ce5211. 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/QZMEN2345936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a52d9f279fb2c7caf98530604ee741a8c17a8adf5b73b81c49191d9d0875fc. 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/QZMEN2345937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e3f8bfd1cc3cf61882c0c15ed91212917668fbba86b186e32fdba71729a969. 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/QZWFN2310886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7153426c6f94b3622870f48996f3995e4063947f72803aaff8f93b40ac7d153. 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/QZFYX2459396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27075c0abb0861245977b36cbdb0c5c95b7895d2dce1f087c0bd303d28370782. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHNA2409097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5877e35b8d6a9544195e32bc55f4d461fdc018bf817757d8576c4cd00840e2a4. 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/QZK6N2494435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0dd1b5c5822e1d77412ab32aa43a2bdbe52a683e03235bdc9759b872a5ec6f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZK6F2434407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9ac6acbec31e1e263d2e28c9f30b909bff9581a379c9e80a688781b3225fb3. 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/QZNWT2423201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215890a3a4eebd21d2ccfbc824758ca96099eb7aa752f9dacb797ca294b8bcce. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZWFV2498485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15ca4ef43605b588c39ab713a910f32b4883bf3c9170efbaee84e9ca85614a3. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZNMX2497727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdd9c4a53456a4d39fcf69c03b4ede587cec4b70fee76bb121838ebd6b0fd53. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNMY2431648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bac6350e73cdb5314c5afaade6c5301e2c6c8ad290ab7323f5765e5ca3e519. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZNMT2511795.