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 0xc820a305faaa1b78b9c5b19b36301d0e55cb65c5c4875261a0a9c27eeb0a07c7. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90e30d8b-3978-43e5-b721-36eef890f560.json and https://artists.proofprofile.net/proofs/artist/90e30d8b-3978-43e5-b721-36eef890f560.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 0x4f3d37333a33dca7f8cec5947440392ef698736cf0728368d390a719cb91a715. 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/USCGJ1609270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691c0f685bec2a5a1cc4f4c2c5cfd265232e0744feecf57d336f500353f8ab0c. 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/USCGJ1609277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fcbb5ee2f0189a5e1079e3ac89d45bba2381a8f9fc147557619c7b6cc71c7e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USCGJ1609273.
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 0x13e951d2f1d8857815f0b2a167caab45de7c5c33c2a4292ce400e779495d9ad3. 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/DEAW51633801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37534087981bb99e84843db4e1758f057849f2c6c2906896346ad14e31f79522. Chain 2 (Bitcoin): anchored in block 957304 (2026-07-09T12:19:34Z), 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/DEAW51633811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fde4d2cd2b91a1881ac1db47906d27dd69b62e41104379fe6b90423818f3e96. 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/DEAW51633802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4daf87e4362fb577692f3a371ba57a73a01eae181167a2971012ac35f325bb38. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEAW51633807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584f7fd27ec75e03ab7a71201bf31eed59d1aee22920fac9927d875847de1132. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DEAW51633808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6183d38eac78be8b8e7f799bd59cd4193fa9e9131a58f6d59513a1dd124e347. 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/USX9P0694797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb3e4f4f3b342610e33f99d9ff847b8e42d5a807f160d4f5134b50c4012a674. 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/USX9P0694804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c3cdfa5d81fb1ca26becd1ddc3f9ac52cb31da5ddc5471ca5e37cb594dca05. 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/USX9P0694808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b00abcb8ceae9a69a3097bde20f793a58af7262352e730af7e2494a857e368b. 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/USX9P0694809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae89f9dbf333e6e70e6470809328f086cd0581251c0bbc56f2692ca2a9d365b. 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/USX9P0694810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055add968c6caf7dda560788a9df6cff6980286fdd9133dee3ea8af266418a10. 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/USX9P0694802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9927949a3ee31e2564330bb32dcd20b2d82ae241ebe33778fef366e2d7f1dd. 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/USHM81090546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf683cfa6ab2e1cf5075a8151f5713601f3cc75010cb1fe5f82130b273f295bdd. 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/USHM81090553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8711706a524004eb399eafa91dbfd5afb1b70804cb06ada85961873ac133be1. 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/USHM81090558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb334077e5ed9ab043c134ab3f088d536b2a576461dacb9bd24073004b7398e51. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM81090566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679eb97d78081413aa2ae11b6cea1d0d470d61bb4280bcd3eacbce8724790a8c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USHM81090569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf4d3f4c138356dc3433628a5b1fb6b949320d56eccda7c56edcc75d042e107. 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/USHM81090548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c3c9ec12999e44afa90ecece968c8bfc5b8c986a5f314f87d97e2d4341a8ee. 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/USCGH1695174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f9ac94bb754ec6dd7a6e2120bf92b44fc43e92aed5901dd8b1004abc244ebe. 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/USCGH1695182.