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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c6ccd61f46069de1ca0efe9dfd34a1bf5b2ab052db43e9006ba83e6b5efcd8. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcec0aab-b8e3-4f1e-825e-aa7f1a3868f6.json and https://artists.proofprofile.net/proofs/artist/bcec0aab-b8e3-4f1e-825e-aa7f1a3868f6.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8266d9476fd973e1843e3fd76cbc4158a6ae266c75d7e04aaed02b9681718336. 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/SE5BW0000401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5410c9f32ecf79f2751a7aaaa7a499cbf7756a829342db43dc4772230f1a4d0d. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/SE5BW0000402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e315298677aa126af2fa1a2b7247dacf87dae0f2328537dbec0f75fdb2820b. 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/SE5BW0000403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6afbad61c3dee2ba4e3ce7c82812246c09edc5df4aa3a0e69f59dfcb787d32. 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/SE5BW0000404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e6086a87919e4d362baef3fa160b561b4b0ef4af08fc820f966467b896ffaa. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/SE5BW0000405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343a0848aee64b2b4b5893c50e00322d57c66608c8d917e0df935a7ff1b0a086. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SE5BW0000406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec74fe3d8d831fd5f63376e8b1263c2cdaa8d5c2c8f17fafd9adac6e50a80fc. 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/SE5BW0000407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ed50d28914be7b027eaab6d5dda683d6dac58f2cc318a70fcb70ca71302335. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/SE5BW0000408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913c994c92ace3f7dd29fc92a1fa66c94b7e2f2a103031d4e7eb821c04026500. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SE5BW0000409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfab2254ecdc018af794a26c8ea57384847f6d78f4b3b53de2fd4e7f459edad5. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/SE5BW0000411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cee572de085723731a29458d38345b0300bc497b8bca207968bddd3a667ed92. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/SE5BW0000416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02409adc385d8dd0596a128f47bbf0b661ec481a1a4d2a10102f9707d72d5ff4. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/SE5BW0000417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac380bd55a1b1ce609a69c5fe41e9ddf30dd29981ba5ef73d9efeaaf25c2640. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/SE5BW0000418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c2e3e81380588353d034eb44d22ed8142fd26dd55670f8fff318fb847497d1. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/SE5BW0000419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad36f3541d47c52000928459d25f88ac68645adf94e188d408648ee5a44f96f. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/SE5BW0000420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd3b6c589550edf7bc31b15b297f315b10d638060e74497163227c7b2faf9df. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/SE5BW0000421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37d8b56c52fa29e1fdb65088701b8053e3eae45a6dfc3906ea806f299368988. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/SE5BW0000423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0757dea94f77f620a3b816efe6b85da75326645ce6def7431ead09aa2715d314. 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/SE5BW0000427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0992bb3446f7ba941ba6e4feb9bcc9e349ae61d0b03317d4632be127db68fa5d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/SE5BW0000428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd32892bf7a09af57bb616f99f1c0e63d19af56719e8882c17fc89a71ab5aa3. 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/SE5BW0000430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d113352a76e591ed65325869979515b4024b8c56ffd0d0edf77073c8527c5ba. 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/SE5BW0000435.