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 0x24bb24eeccc4357d171cc0c18e654d31f72aacd1142f7c9b5d736b77f2911a10. 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/9beffb28-2e7d-40ec-a62e-fcb6e8391366.json and https://artists.proofprofile.net/proofs/artist/9beffb28-2e7d-40ec-a62e-fcb6e8391366.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 0xf1c1acbe1765ff8960a3e050916ba3176434ad9065e876b0ef457e93dde92e64. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCADY1836787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fc5a2ab7b540b240f4d123f8c95c86a964ff811b3ca498ee63faf4b90f689c. 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/TCAFQ2176551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb266b65bd2a2996e6f2fede0547d6fd69896f5f8a310162fbdd0c272a45b0d5. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZMEM2256867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc75a7c4fb138a69c8325d7bdd9e65800bc3b714b7ddac96f17e4f33910f663. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZMEM2256868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee934f9a77ac02051ffaa774ab278ce5787656bd5b427c662d4ee36f2aae5b90. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/QZK6G2239627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73886d5e9e2bc92fa5d0cd7b3e65f29d2b57eabf968357f81779151b28dca75d. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:36:51Z), 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/QZMEM2256870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5edf87c5fff78292a6921ae8c5054974b8b8ad23b835dacd7db89ebf084ae0. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZMEM2256872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf5981042bc9531fccac1413aeae1371e5d335352efde6efb84930e7ea98ad7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZMEM2256873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a9d37947b7f985a8315f8da873cb1fdbdc2f8a9b438042862ca2962e4234a9. 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/QZMEM2256874.