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 0xe13c4c315fd72a0dc6aab88a19f9d12d378bed677a71f2cfe0f9ce1f59d7b6c2. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb2d8825-64c7-4392-ac5f-383406efee61.json and https://artists.proofprofile.net/proofs/artist/eb2d8825-64c7-4392-ac5f-383406efee61.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 0xa6bdf0e6f6ad10534756ff828d255e41ca49e10ad7735a09c7c2e5eef15a9457. 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/DEG932302239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ca6813f3fdcd4caa04d86dbb1a4167e385fbd8822d5794a7d052806e90c56f. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEG932302240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb64141d191b8e5c15563deecc78052f0538af506f62731235f449e0dc3504f8. 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/US83Z2478497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa486aab99942742925f4b278454f9444d09108229f3d41405d923700898a7d. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/US83Z2478498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f419eff4d7c7471bb4a3357d944516a70cdc7c5f8386b302be8483a01610999. 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/US83Z2478499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211079c93e48d790018498d871c5a5956422d31afbb70631e8d9c1e5094df436. 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/US83Z2465634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc3eaec3c2bec1f2e2553db19e3c7fdb7832df3a6a4b82b4eb8fc2cc1b3e9b2. 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/DEWV42400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad915d5056d5bdb49a780abff97f469bac8d08f64e37f0151b997b88c7f8eca8. 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/DEH742333269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4693887cb39e94ad882068957dc979366ada2a281da0e0e5303979e99bcd4b21. 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/US83Z2348489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d74854b7ad4c7acf3a0c7591b2cc36f38c6ccc2819c820017d996ac67969b9. 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/US83Z2348490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18405ea3133e59d081fae55da807f06231530ac7ca1a1e1f64d7946d83e06b46. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEPI82319039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51db1613b2cd84e6503d1af07c213143bf36ec16adb590c92c20b64ff9bab481. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEPI82321465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a8a437d7dbe5696e331f4e50adfc9989296d572ea6891e2783a77c6d39ae03. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/ES35G1200908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c63a9ef4c17f724c79a69dd11a9e5793be5742771c6150818754fd8236ae41. 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/ES35G1200909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436a6f4278f1773332ad2101a85ddef4da9a80bbd05fc8280530deacab5319b4. 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/ES35G1200911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1aa6c9959a7fc571ffb59985a0fcab5ef3946763ce638dc1f7d85cc49eb1fe7. 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/DGA0M2359884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06a15821ae0862d35c535f860e7c7f2db7aaa160fea2cc8b469da0aae356b24. 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/DEG932301870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83f97c841cbb7eeb04db82e2cc78d363189da6b712f9267bad5a1b866d97d3f. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/DET752300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f2ce84ced6df19d05422a17c03d509a641e69b2ef2af6e6168ee4b38dfb5e8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/ES35G1200849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3a96749e137663952fb6fab32b7dd4f2af2a0f079bb8aa9107c54819a56bdd. 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/ES35G1200850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded9c49a01821054f3ee6a86ed87ce35c571735ebba101d598058efe5d1c0b99. 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/ES35G1200851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7a29e2da322e2dad02f16d73915ead7a8e3ec84b14808a67a0d9325e979edc. 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/DEY472277023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6823b9336269611e25482bb923fed84a46638b5e57cd0a0b39b8521e25f764. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEY472277024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a199c511f3c649e93303702fae98bfba9468e69431c4ce08410c963ecc813f5. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/DEGL62200130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ec2fdc9db5b3de6e5ee47c14718947f79913edf7cbd517eb2b9aa3f996f224. 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/DEDH72200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf195ef3bcf877fae6e0249263c76ae93db404deb08edcd698a432e2b4e2aa7. 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/DEDH72200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998cf1a15220489ad2e7fc2a2af9e4817d492d5cd844c15bd80906bdd5e60ce8. 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/DEDH72200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7b976253a151ffc14527b45c59136d2ac8897670fb053046d43e5c13bc06fb. 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/DEDH72200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5888eb3910ada9695e7ad1d61d612c4f9f7b1d62aa1d2770ba090d08e13b22b8. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DEY472174691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135c503cc4cca1e13ab0cd63ef7658bbc3ad69cc132a6d15bcefc701f8f6eefd. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DEG932003759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043665eaf71b9a900fb828b4d7dc29ee85dbdb82cfbf47e603b949eb984c66bc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEG932003757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93502253661383cb6e74761e5b1de0b261f5e537af00f0b5e1ac597d7576f928. 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/ITB841600540.