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 0x8b13f93d3452fe5bee88d390b23e6b76617260d4fb7ed5fa5894cc5afd9dbb7d. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65d2a4ff-68b3-4919-9804-e1e8011d6dfd.json and https://artists.proofprofile.net/proofs/artist/65d2a4ff-68b3-4919-9804-e1e8011d6dfd.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 0x2702e49f1657bfaa338b93e24b754cd16b7a520023ca0116fec697a987490ef5. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/RUAGT2205366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70643c9d43c09f9849ac4a0b6bc3a48399b2f21b2fda7dcf8b731c0fbc6f7fb. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:36:38Z), 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/RUAGT2206394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb96319a01665aac5cd0c6007cee63eef9ae1467e6301eceb9e5e34f3e94e5d. 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/RUAGT2206396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820bf05954275a2520b4cd5b0d6c62ca1a43686499ec9a363e074487dc0272d3. 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/RUAGT2206398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f860299fe6bd91dfa3829de14d20d9960b911f34a4a8a2b6cd43d820bb9650b. 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/RUAGT2206400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b363652cfc2ceb601065ddc27a4c83046c2cfcbee691d893b9c6afe2ea338d4. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/RUAGT2206401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd004d44e5233fcb70dbea3a7cc449e06bfbab63a02f0ac58fe42c5f61c6fc602. 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/RUA1D2359856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d664eac95ee8d3664f8a2ff522359a3006f3502e56300b8149053bf1d6f4a9. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/RUA1D2410659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df1c10ab3979f43822b63cc3aaaa07a9ded5871c9fa403e9c5892e9169fda9f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/RUAH62419882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34a4b4344d06b74cb798cc2bc3d9293e37750eba7de463064dcfc4a45765c15. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/RUAH62424247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd394b257fee8aaf32107c966890a968daf86db22b818ea8eedcc3065965d71d8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/RUA1D2515062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00519b2047e09b0eb6f26c5b2b33693c03f52715f2ab058550880e3091e7de87. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/RUA1D2520642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee3f0b946324e8bbead767b5f9e943d666c2efd6dc516ad088164bde3749628. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/RUAGT2556387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cdfdc526a1982abfe361a79c6cfa3b1186291343403a07278299a3ae52e935. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:45:30Z), 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/RUAH62506732.