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 0x2399c2322785e1743607864b484f4bc17cb8b87cc3f1414772150c7ada0c8d67. 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/bd712355-5fb2-4e96-8f5e-34fd00e0ba59.json and https://artists.proofprofile.net/proofs/artist/bd712355-5fb2-4e96-8f5e-34fd00e0ba59.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 0x1ab6cbe00118e5cf61bcb9dc58791727ac3d5c52ea0e8dc90158fc1ab7ab6d5d. 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/TCAEM1904607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038b7d888aa1b415ab29a39ffd8712652ce23d436eedcc92a95c8f1f4fe6887e. 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/DEZC62036415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9263736bef088b4dfe900684b04ffb965ce5e84a10e495040add13074fca4b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEZC62036416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca61658494325aab77ec58f1c56b9be177a5969921d16aaf3e2740dcea2494f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEZC62036417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901394e9699d649caf6968530cb93ace32c8749357e4b53f29488fc7dd8008d1. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/DEZC62036418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf50ce2d9cf468fdffcf1cee791e76d795a1410f4930989476affd5a53a829e. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:08:06Z), 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/DEZC62036419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee8d007f8a1af279f75c8f83fac2e913423f4458ecbb5bf609b0fd45826bd24. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:27:14Z), 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/DEZC62036420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57f56f63bada31a60a98fc6cd522b6076e1c1c5db2db54b89e3bfcee49d5ede. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEZC62036421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637d22c73aca215ca15d30bc94d3b4f3de4af604db1c373ff3de065b1dcef87c. 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/DEZC62036422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941cd511a77bdfa2fba175ea822410dc48bf423499323afc86c48f675be35d50. 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/DEZC62036423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89bed0dff14e4134e0cc9e17b5fe0a0eef822b598f2801cefeae16a514296744. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/DEZC62036424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1caa1498c394ec0420801d07daefd2b6f7c0b263224469dbc382314ab2f7f2c. 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/DEZC62036425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae47c8f8eb25f76bda0cf94f0373309d11f8394012f01300e488d7be5fe02c8. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:40:49Z), 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/DEZC62036427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ea3ac0b94887e62de4c3746b98e77758ed3a7acaec5a4f37fec3564591fa11. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:01:30Z), 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/DEZC62036428.