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 0xa7876b024120dbfaa44ef040405dec7670c26896edcd1546e974d1019e2c0fcf. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05c9b5d1-7f77-4400-9724-82fa273aed80.json and https://artists.proofprofile.net/proofs/artist/05c9b5d1-7f77-4400-9724-82fa273aed80.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 0x5d5914e7b5ca2c68007799e83125178acc6637c15f49fbc62aa190916748a53f. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/TCAHE2389106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc93eb84aaf4b753bb6626628943c0f5f0deac8f5a3e393b7df0016801aed233. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHE2389108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9fc43627d13b2613f2d36a1111246ab8bbfd10232293dd5ed92cb737f215e8. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAHE2389112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75c6eef10bd83b47091217e4065f3c49ce8ccca89acb312a8d5385522a74a22. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAHE2389116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f58794c1588219054b74466185d3bc09930bcb5235a32d5abffe4eb8b6cd71. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHE2389119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191ff5f572fd9b55e7a0ef68c6914ed3698e548c43c7095ec1e1a3a91b1574e2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHE2389122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f75f3b88c3e16abbf1855c5470da6734788f6af24508b6406fed3082f461bd. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAHE2389132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2ae05c085c8adc0c394bebda1f5b8266ee26f1d8afee5b08f648ca830ef00d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAHF2332915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ad6bb1fb601b6fa7384bcb1aab8efcf91304e870b36284592c18a3eb38c5f8. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/TCAHF2332917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a0005370754fee47775d19bdc51a2d388c697bf9072b7dd2e0ec0e775bc276. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAHF2332920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fb9dc7030547e91b809b3940103381fd871a48b21ca2244a764b7aef89381e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAHF2332923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e24de1412f2769a191fdd8c01b9a563b987d03b15834d5fc0b7862de9d10b24. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAHF2332927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59212de617a3949f1de30594a078cddd236cac1b1088612f6c0e4af8a41d3b3f. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAHF2332929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b27ec9184a4b5af26812f18083f348e6efb25c06fc4bec5e932ac276bedcd1. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAHF2351363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665c1d64a60dd9671dde5066b5cd5337cb3126ee8d2626652bd8f4b6565c5416. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHF2351365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8260b4588513083edf2aa792e9b517f558e217b493e4cd7e27a082c5e6449db9. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAHF2351368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5348c3a64bf647e06370772a7117e2db5b255f9c8840912dabfdd2d1ef7ad120. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAHF2351369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93132560f22e82a6bf06be32b468c34b8050b5344dd8e4848b7d212caf33545. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHF2362879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd817807729e87bc84b02bef45b7eeec2b57debe02740156572792139dc8e2ab6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHF2362881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74b30e82fe157bfae77c1e8e7805bb7fd4416b25acbabcfc01dee258049b2a2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAHF2362883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7304cc1b5af00208ce28f8d644be91fc221d92c519012cfa3665701204d9ba3a. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/TCAHF2362888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519a071d5ece9ef3ca91f433eb36c6f88dc681a20388cf240ef50337cd8de1e7. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAHF2362889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1e529361087fdf58bf8892d1b261717a462df452b956c7de6ed4dd7066ac96. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/TCAHF2362891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52639e2befc28be3e4f1059efa53fc8b391acb139a6ca7a057ce325f198cba6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAHF2362892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559b6be6d6d9ef2d4246a826d7f6dde068fd75ccc647005fa435a792f51f96d7. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/TCAHF2362894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa997ac213ba4080269c50fc81f912d5d1766144bd8a8267f18c851b2d665c06b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHF2362857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfba1ff33635cc2d58eab7aacfce85e981f06f9e94becc2cfff90330957c79e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/TCAHF2362858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99fe7519a753384a097b965da62a0aca2a3ebd8aa5a5e80796ac547403763c8. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/TCAHF2362860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcc52577d3c3774d6c49ca3b5d0090c4cfeca2838490a0d95027e2126afb661. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/TCAHF2362861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c0b4dc66cee693c870f3dbf354053c0c69b67d32fd91915d474cf4262d7ac1. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCAHF2362864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bc44038355585c7aa8615da28e297518d08dc7b8e01bcd0b7d98e2321fea89. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHF2384305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365141cc97803e9f7d691c25d1ecb425b3e136899f2a4fe9e4ba4df1f3ae6c94. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHF2384330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf92ec4d4134408872973641d8d91f1b4d03155d7fe6a135a33f6e2b256e0f7d. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAHF2384333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccadab1a8a3522ebca47c5288ef484de31fb54f0558da4d48179526c59d4109c. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAHF2384334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e837549fd2231b1bdfd9ee305b5dbb54ab6d9f36c63c3de62aa374bae0c5a5. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/TCAHF2384336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4804aa36199ac37782dfff9260a6ad6cc50b3b1d55f5be24e344ab2106cc0ed6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHF2384340.