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 0x9b5c462cd038477f929a2814a0b6f3af1865aa52c6c91ac0fa2fdb0343162523. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c119ac3f-4807-4ef8-90e4-16a91ea8844f.json and https://artists.proofprofile.net/proofs/artist/c119ac3f-4807-4ef8-90e4-16a91ea8844f.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 0xa15fe7bb0dc525b0de999c14ac87f9c51909587cb63ec583cf79c33414c3e6d5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBBFT1000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5400e99482bb5fd0d36a83f44bcb5a8a6dbe29ef281c6385fea5a053410edc55. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR80T0600250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01b78af43cb6ef7fcdfd5b53bec2c85c9a214c2c0d17245f75178f590e71b62. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBBFT1000123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394781ba8b7c9d6de58a5c6cbb11b89eb16312041c8975016b5c239e03dff7ae. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITR551415199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc747b9e0bbace4e0e06b239644eec6661b9cfeb9964325fba35b5f62b954fb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR0W69924601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ecd25f98c6e37f5ac64af24b60f4a6041494f65545a3c262041f63aaea408d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR0W69924602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf196a573e8a6ea520949de9dc72766c6dc2263868dc8daee96a0f23b418120. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX079200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34dc76b045778115ced4090503bf9b7d0be15dc90e6e67d4b13a251bef7834a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRY510778051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb421323df7cb6f1561cf201741d461f700209d1f0fe6b636bf9678ea6d98d8d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBBFT1000122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82725054a03aefd6992bdc31ae5b9bad728bcf0c943ced30ff46a1e0713d7f17. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRY510777809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b961dfb69ca023fdde7f295679e89e12c5eff5c9b32800d81b991d6e37b618. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITR551413842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1529d943158760a74e5054764acd802ae775b14fd5a72fd9cac96b64c58bb1fe. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ITR551500060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21c9af9e855aa0bcbc8c2e050429ad5b81904cf4d8e1f0d82549f72cc50201c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRY510778032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14ebf566d98ab0c6b46a1842286958aa803fb486041f461c7b5320f1ec5b0a5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR0W69924672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06191085904e713401d69adb344431ba39d2339febb61432977026a98a921056. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/ITR551413183.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3caaccc01fd666592eb52101815d7deaef55f9dec846870e973d51e98ab8d214. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKZVC2393036.
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