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 0x590cb88ce42ed0a2a6b5adde87fc2a10f9fe0e209fbc193a140c012eac6709d9. 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/b7cbedab-1e59-4e55-bb66-26687bb7c5a7.json and https://artists.proofprofile.net/proofs/artist/b7cbedab-1e59-4e55-bb66-26687bb7c5a7.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 0xaafec481d263a37cc64fa392dd15773eadbfb877e425381eeeca9511284f52db. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/IL1030300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7c22ad6b9691cc1d1ea8ee195948349211ab292ce94ead198fd7cb8e72e62a. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/IL1030300084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1bd70a6bcfc208d523e5224f732af7157b4dff46aa65bea2054a3fedf94de6. 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/IL1030300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf677fec9a2199e34341f71e2884a3b4278f2d63df912447cc2868e534a2be8b. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:54:47Z), 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/IL1030300114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6dff1da6fb2b637252e93e128ea18265e4eefd06e1f8fb2eb33b9fb0a19e89. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:52:48Z), 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/GBKQU1457775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1be5c9f150d50775e74d5a26dcc0ade017416a1d4212e3e4802642ac5e7661. 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/GBKQU1457776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4760333889317f367d5460a956ce1aac62631a2fd7a24f55cdfce0e03f1a54. 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/GBKQU1457779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b72c329500e4b317f06c860902be55c30867cc05af697ce2a3897ff49783e8. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/GBKVK0500410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b41a66d79b518adf90f70e387d94f59413293cec71474845761bb1f5eb800e. 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/USLZJ1707975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95781f1aeb5668ea1dfdc297a4768d7e45912f634c89a8fa4976a2c8b9de59a7. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:48:23Z), 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/UKR6V2020443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6aefa55739b962b53ca645467161390f8260492292f10261e01a4a7b6d5609. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/UKR6V2282359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e521dbdcbb135e01c25383ce454ad60fbaff6f121d29401f4d97e3c007a41a. 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/GBKVK0500206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fc4421649f679c27b82d1e11ce7de794996d598d7a613b200fdca5b64b58e5. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USA2P0728551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf698035b905707889dd634454ae45ca30550ca6d103a1c329195db3bb0b9f0fb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBKQU1458302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93760112ceb09bc1be495203d3695606a1850cd3882a986f183c224f6f4dc897. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKQU1426290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc846fb7004ba21c8f6dc2078708890ccf8c6a01e8e5817980eb1a59c433e50fb. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:59:33Z), 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/USQY50970317.
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 0x1c123865edd6a909dd6b52f9478f66029e0704370400c9f5b474ba249b08587d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BCVO92200052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e59e03640cedfd6974a59ebd533443e41f9125c9cc63d305e84ad9a41436a8. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USA2P0728557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa321c7cd2e6be26289c32b44dfdca5b46526db61be35f52a9a90c740dc32f0db. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GBKQU1458305.