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 0xb9a86d9e4622b0de15f161ce543a9f269e748ce149630130153d5361bf5fdaf3. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/febc48cd-c250-4f5c-9f49-36237cc2a5a0.json and https://artists.proofprofile.net/proofs/artist/febc48cd-c250-4f5c-9f49-36237cc2a5a0.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 0x39c5d61d3e28038b3fe57c6fe4561c8ca339bb220349d4e29be14195ddb25cc8. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/FR59R1757505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1095ed08b882938c3450920ced8ed8d28f77cb367652b9b01904d50f618663c0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR96X1929978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d681ec259bb31b6f017721d744ea55edb95c3aad4961be96a16e13f5e2588f. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/FR59R1839970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822a01f9803d268b8e1c418da9cf3586bd3d172c158f00f2baf857ecb5ddd1ba. 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/FR59R1839973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c94ec9f7b609302664d15bc72585a280d18c67d808866fe8dbdf8fd4b5ca24. 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/FR59R1839974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5073f70694eb77f9a0efb661985c238922fd5524fe1208455a91fb6dbfe56e8a. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/FR59R1869810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf2518c486fb9d4156601299ba30d59665287429a10fa2e1626b7a69d808703. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR59R1869812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c83d09af760d7cae7e5b90d84673febd98ef797cfde9d0c2131502faf40f15. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FR59R1869814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a4e0f73e31b16a5c01ebc6fb79d11f1e14655b4abc254b9312e83466a7fe0c. 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/FR96X1941344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815e750da713ae5bdc4bdcdfa7eb56947d4d8c6ab41b5206d268cf90b4dfc4af. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/FR96X1991723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa812640c13b3ff0df2a5525a012922fc6c80b28d90271b7fbeaca8dbab629a9b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FR59R1868479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e3c4acfe9798806ff9cc15aa13f57971e829011f053ec1aeb4c08e9267e8fe. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/FR59R1839983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8d12e876fd520fd1ecb0ec08f29976f74e76408965a6ea531abcd6ef3be96f. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/FR96X1944239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9c756ad83fb85c5fa051cf4bd8d75c25edfeb1649378414afe7b0c535be4c1. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/FR59R1869841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb4ea905d8073d1b36e26ba873d8700dfeb6b5cac924bb2d8aebe94b95a691a. 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/FR96X1970973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf035f7a255c300eb42ad6039c56aa1177729ab1f43da1ef8f82566ae67897003. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR96X1970974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b99af5eeffa6ad1ff05ef380fd7cdbc6b201427eda9d28a4b7a06c26d6d4bc. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FR59R1869865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5844bb8f6af2d22a7f823fd70a01c1d33b1d09031bc498f697340b012f334f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR96X1941350.