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 0x98b04e4a9b1dfd2f9c6cf6dc33fa762ecc2cc549fb4e3e604638ecbf01a0ad42. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6060898-fa3e-401b-b16b-17473768528c.json and https://artists.proofprofile.net/proofs/artist/c6060898-fa3e-401b-b16b-17473768528c.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 0x3c8f9b6218be1f3cac84490e3b2a3e7a98e537d810f0acf0b813c6b67b4d76cd. 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/QZWFS2317126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2445218f04480a28bc549ce474f68273f32afb2e6849b6b9845f8d033a5b01. 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/QZFZ22404074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76f98eb98e823464f11d40bf7007928c72b7ed2f5c795ad463640ec54f74a8f. 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/QZDA52475137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0891090b71932356699fa263f00e98e67c4d11333a920a4b32240751ce837af2. 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/QZES82402571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57785aec6777c1c6fea894b6d1839c0373b34d5b3356e7d298b2ca81b66b15b4. 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/QZHN42449587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0891090b71932356699fa263f00e98e67c4d11333a920a4b32240751ce837af2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZES82402571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76f98eb98e823464f11d40bf7007928c72b7ed2f5c795ad463640ec54f74a8f. 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/QZDA52475137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8f9b6218be1f3cac84490e3b2a3e7a98e537d810f0acf0b813c6b67b4d76cd. 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/QZWFS2317126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2445218f04480a28bc549ce474f68273f32afb2e6849b6b9845f8d033a5b01. 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/QZFZ22404074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2445218f04480a28bc549ce474f68273f32afb2e6849b6b9845f8d033a5b01. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZFZ22404074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da3ef57c77a84a7d5571b0e33bdd66ba8c7be4a129e4cb243c37c9628287d64. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:12:48Z), 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/QZWFS2317125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8f9b6218be1f3cac84490e3b2a3e7a98e537d810f0acf0b813c6b67b4d76cd. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZWFS2317126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf829cfaf5449c9c1584e4cb908aabdc163822bd86f54219115dbaede1946199. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZES91913419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2f680b6e51af9ad0c99ee3530744586bccc19a28043b510d002b952fdb0f40. 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/QZES91913420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992be5eca6fd07ca694a5c985cdd012e68655ec9699642b9a9681737f228af5a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZFYX1925495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7589a225025974353f1cea4e94418f8a757ad78d7770c05b0e15ed8ed8bc7ebe. 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/QZES91914731.