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 0x537b62bc55025151bb0a1e0232e9ba74fc77efcd7fb20ce019106edadc920548. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8daf47a-c62b-424e-a36f-a18da5baf918.json and https://artists.proofprofile.net/proofs/artist/a8daf47a-c62b-424e-a36f-a18da5baf918.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 0x49f28b3007c59c6464ffe3b5cd589662f8c62e08bc9d4d039b32f1cde402ad8b. 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/QZYFZ2322200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe367e5624265c3091140987a7eade31a0924449bb9ceb28b31fa241ccb2b4cd9. 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/TCAGT2319404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0664a54dfbdef8622b6ea01a86e5a2df2cf3682491e1c87d8d6749791657b6c5. 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/QZMZ92251747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4c7b1f2cfbb94e8d7a428d51380a3e4b75535f078736ee35b94120f1aa3e62. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6MZ2482220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d12078035b9248a5c99a1a9850ed3bf401d3adf1844fddf19aa64165eb58513. 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/US7VG2549250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79075e0faa5d67fc60fbb0895be1afd0d768f096173466aa47a3715d55854486. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BK4DA2501554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b540913b7b830c618b238dd4b4bc31c11355b548b06012567b071543fc0402. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWDW2468210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f9da54a9c3c30bfac0c79674f0b641f4fa2bec08af9ca58518a87b8054a44f. 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/QZS7J2267905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461b1b4f0124dfa2290f72dd6e0c50076711db4aa3db9c4a13e76b83f70aa6a5. 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/QZWDW2465118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53542fd01dca3c6127b7aceef3cff6dd3b66224a0c8e4076414e070ec271c55. 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/QZWDW2465119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1369d8f17fbdbb48e70177730c2af063ef3b942201197985db69af9e3dab88ff. 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/QZWDW2465120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd69c27039f1ab1c042d4ccde5e6fab35c285f1d65f45811d0895395b2ea65a0. 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/QZWDW2465121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d77eb67e49cb7ca478407bb03de82d7ed7e2d81ccd01aeccdc734b684589609. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWDW2465122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995e8b00d132e7309c189c2c72697d708b1bc9dc8f73fc53ac20ac60579b1c97. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-21T17:33:08Z), 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/QZWDW2465123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7b5b89f30673bf81ddf8b88f073d5f80a729bdb6320927d20a1192f0c2536d. 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/QZWDW2465124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e072f789e9fdb981dad1d045bb9cb9f9125bb546807cb9185dbb1051c70d7a. 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/QZWDW2465125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1dca35c1ca09fb71356b236c467f07103363c4817fe3dc7ccd04557d560bf8. 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/QZNJX2150423.