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 0x193ce3b56c6cf856c6cc03ce0fe656cd9b947388a160a8d0aa7533f204c19c3d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36253a23-a15a-4a09-9c37-5e421020e79b.json and https://artists.proofprofile.net/proofs/artist/36253a23-a15a-4a09-9c37-5e421020e79b.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 0x6efdf2f072d34f782aa43a7948a6d10efd76c0f7e52ad173e0cab3bde164af62. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZHZ32143442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e98e49cb875e8bac4e8ed1ab284818e85d944f236fdd4b1ac8196b54a8c416d. 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/QZHZ32143446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f29e9ab8162905447d0b78f5bbca6e37055d9dd570968655c2d5403b273e5c. 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/QZHZ32143447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf706db43d49d03f7f5e3ae2c645b6c8471d70859db0c32aaaf8f7fd1724a0582. 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/QZHZ32143459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c858659d594768aea4878a9195126eee64831219110ebfaa02fa1b2d8e5be1b. 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/QZHZ32143460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecce349a2903665e8a37902199a1d38f0ab83a37d39f6d91d63bf06fdbec248. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHZ32143462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed33eead74833ba17b2abde5e481722a1e7552838e35ec584d7578048cebc98. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZHZ32144467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595708b4562021aa05e5c7689c250b77eb19656c81e1de4495c7fddc4dbae00c. 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/QZHZ32144468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f390a7a7bda7e55a3c9ef3bcff4d052629566585f2060a98e4d5eeb11061a51. 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/QZHZ32144471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3f03389004a93e325206ebb43274de29766f36f92ea002456fd50384cfed46. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHZ32144473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025697811b39a41e928738f2e5910736e2033ee7d810282e613677ca115d822f. 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/QZHZ32144475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bac5c8c45a2b3afd6561f5e239ecfb544d77825d40ae80ba7a06a68ac30b9f. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZHZ32144477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf101adce8a5143471a48bbc8573db62051607ec79cb6be08a555a3b3291d0a3b. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZHZ32144478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c471b143d1a83a663e31f19a5577d4cdd58e73004d1dc613bdf350d5b18dc0c. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:51:57Z), 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/QZMZ92220832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381a17ac8e24a259b24edb7b734fc2a462e50a6df783c2a2a00d1b8c0b5eec40. 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/QZW9K2210508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93e6bcb08eca21bcb3239dafbd7e64e1c5dcf06a76100bc22b6c47bcfa60c5f. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZW9N2212698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5f84c164478caf0936639bb2808510246c4b67e9db94722e3c1d84f7c90051. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:17:11Z), 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/QZNJY2317095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c713d94b4f5fae053ba2d3e70a25ff406c22e5021b831718021d335f828569. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZ5AB2451152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb974245d26f312107453cc596b0d5395bf298997a6cb6ad9023d02e9fc222133. 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/QZNJV2460917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aae7cacc61628223644ad464a5dea37729b9c9832c87bd9011273eadff896cd. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:58:00Z), 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/QZTPX2552795.