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 0x800c918a07d45b09a6e35b9bb5928597c8138e48ee797ebdad1f2a42865c7b43. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96b1f35e-a66a-4990-bf8d-efff1b2f7c87.json and https://artists.proofprofile.net/proofs/artist/96b1f35e-a66a-4990-bf8d-efff1b2f7c87.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 0xa50653d542e81acdb860ed2bf3ab2125aefd8626280e787253109e1dd613a516. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DESY21401352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2223cf9c1575706e5e50e480fcf0b31471cc9d00e68e84fe5a6fab04908237. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DESY21401354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2311170c98ea04137519b7dc3306427ad1e3c817207a7e791a954b17761557. 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/DESY21401356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbaa6f1fc648bdf62704ad40f8540be465a6194bc548a33326825addc6bfec31. 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/DESY21401357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bb67801865da6afaffbb6252345967001ef48f4c692a02441bd1f861b5f06f. 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/DESY21401358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee506f7ed893a9be7e811bb8bf6bc9b473280c52fa10ec9a2c4487f5324965b. 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/DESY21401359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0387ffa2b5695361c29ef8b51c32f41fab338d59606a1cebfefcc12814ec6d3d. 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/DESY21401362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976c8de78176b43292fece97463db564f6a1d9a43af8084b1d1f8e0489341cc6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DESY21401272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec545167cb0327872256d5fef0587f00f2cf8b70d37f0d425a3828f59bb33e3e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DESY21401274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10687844871fd882bae07b1821f41fe86f22721b7d756147e3b2d2c9a752ed91. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DESY21401275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb6ef3d50abe64bdda78965d2098902748e103e9736b9a5c527875c9ea0fd7d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DESY21401276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ffa3db6494afab6e7bd50bb49544978387c60efcba15200b0b365fdeddbbbe. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DESY21401277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71d0b2470aa338a647bda16e0bb6f07033f60dc50ae215c6354b6a7f714c9dd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DESY21401278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009d314b68f521ae260ced958b2eeadd7db1a2e1cba2f42e6e50240dc50f5b19. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DESY21401279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48634f50b92ee6f8737e7db71cf0ed26367f054e87e1a35f3c20db7d44fa12e2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DESY21401280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810a4d9040539650560b946b861ec3de8a23f2e5cfd141739ad8645db193ff92. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DESY21401281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d1513c4b6b1f6d0e1b7bd706302b73bc4ab4b71f5b29c957f35d03ea32988b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DESY21401282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bdbe83c89c5864b20af587a001891af07b7ca6e9aed7eaa87affc30f70e3b2. 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/DESY21401283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e32a43b6c7432bca83111f94818c9fb3cca4c15a69d821b1ea164c4d079044. 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/DESY21401284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ee034e9a722ca1d66bc1316c16ed8f1357ec90fb7e23ef89ef266f812bab52. 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/DESY21401285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf06df724bacf54c8fa78a8394e61a801796dfef7f8bac7632133316c63f72f2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ022390338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b6d5e5c682f7ab94f548d1fff497848f060c713379bb6a1ce408db673c5816. 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/DEQ022390263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363c9c03b2a22d5bf3659d65ec231cdfd98f5e505ac52ec45ced0f2c7dea7b42. 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/DEQ022280006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed11eb49e16d1d14b00588df69a0eba795bda69acfc878397d368e2eee618aab. 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/DEYX82186839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d477a0a02dc830d28a778a678c2881c5f271d56e82cb7376f8cf7e518e87d3. 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/DEYX82197560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177aa59fe18dd9ac1cd7c97f7c22b10632cf7c0e97c256ca0991bfc53e6c4085. 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/DEYX82197558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be1159c15f53ccb935425dccef6a4b41955acc8f89502c3b454c1106d0cc2fc. 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/DEYX82197556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fde375544c402ebeae3561ad8c5eb2b0ba4ee770db3edf3e1c052f73e7b417. 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/DEYX82196030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b790b913efe7b463212d41826a16e58c0fcf6f4cf01cd18efa2ddc5dfb28be8. 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/DEYX82197563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cf2c68226a4a1b1d5160438a378786472e77c808c6c1c73dc8cae56fd40de6. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEYX82197559.
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 0xad1348f28a4ea335f2f2704bd05cd9c2b9487a8334f12ae6e11913cc1bf8c127. 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/DEQ022390862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67125759fae9b1f7292c9ee642a701ebbb6221c282d7461026f49d7488415d0a. 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/DELJ82023599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c39163020abd1ccd2b833d2b392138508abfb7182099b763a5c0aa369ae7d57. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/DELJ82023607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1800573c194219cf02472693b2c0aa65278279b16ffa9f3181bb5cea11a53b1. 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/DES561912008.