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 0x85bb95c45fded7aa68029329e1802388fe1652c33ffb48d68f30a5283d534e29. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e45d4382-1119-4b98-9373-5c164392bf5f.json and https://artists.proofprofile.net/proofs/artist/e45d4382-1119-4b98-9373-5c164392bf5f.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 0xe1396b545fb3e0497ff3d4770d77aca247473bbd46805f6ce960f494c1ad1f7c. 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/USHM21704593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fe57cb852716f64bd1b641d0bdab00a0321ae97fb9fe0ba8cbbeec6d5a030b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/US3DF1970622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef85181526ac802dd75f67ad8ef16ac21c711da57acce1fdc8ac0070eaa6e148. 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/US3DF1970624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698d162746b0b7ed93b2b3ed1aa74d82cba7f6389f64f1d267cf3c72a8d1a5a8. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/US3DF1970625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0be2a612711e86ed2e0f6bf5f177e194f4b7d03b25e1d1faf6e4a5268cf34c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/US3DF1969879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f9cecc523fefd3d47c443457bf863cb120fe9a402b2f4960eb9ed52a4925ec. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US3DF1970627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3352097809996c48b89db884f535d2a751577141ec48663cabcd2c9cfc26f721. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBWUL2037512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430c49f1ff858b718c33899e6fc21c4a35e376f4c673e85d88c4ef57f309a451. 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/QZMER2224828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431349cd63fbc6549fc214c8d5f19fd841aa72506e0994ad91aad712a61acfee. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZMEQ2284729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e01473541e8af4a736193f109ddc02bce1e98f5bd1b1577181c0125356a036. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:47:29Z), 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/QZMER2224830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b5b3056634e2121c77bf725a0e63dbe96ffa47f117d158a51d8bf2087d38ff. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZMER2224831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2385f07cf28e4cd51f415e7832e2d4af0400d9a98d15ed1661ee32925c9f7eb. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:46:16Z), 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/QZMER2224832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05699afd921ef2ca31bcfb7afeb453612db517f1a516f7c83c8a6734411fc0fc. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:30:10Z), 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/QZMER2224833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa62a1a027041e969e9f4812193a3453328e66e77fa68aab6655c176ba9e25a. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZMER2224835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b364a488922154e0d368986dac87fd6ebd4248ca47fb5655ff074d430c67399. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZMER2224836.