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 0x52b2f7cc381a616f498be4aea96cce1eaa6bed83d552ccc97cdf19da55271208. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8b7feb0-7031-4429-b659-2ac58a4534c6.json and https://artists.proofprofile.net/proofs/artist/c8b7feb0-7031-4429-b659-2ac58a4534c6.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 0xcc2ca95ab90282b334348a14c786b5dd2bfa4a9954eb97dd9dc6c6606db129c8. 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/QZDA62448158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240464430fc4d952e5f91e989c8593177fd534349881e11c3aef31cfd3abd75d. 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/QZFYY2173001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7374ce9f5fd7ef7ab4cd640cae3bdce76130eac4d5cc7cc74cd89670c3b3794. 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/QZFYY2173003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e1ddb6104f6b3919e806215d932e3eba93180f2f0af259794317877f492d55. 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/QZFYY2173007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef0d54509bafc3e09eb6073aa473c0a773744153a5556562ddc9d2daab81a8b. 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/QZMEQ2016175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782044c6671c50a02fb3f20e94b782aa7755222c21dc4813c4b3e0e30de9d8d6. 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/QZFYY2173009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3f356a7c21cd508f1884194e445e325517cb303ae6ee1fa4c529b68897550d. 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/QZK6G2048953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4aa895db62a1e6c314517b6612416e9507749163e48630169d04600b1b56e2. 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/QZFYY2173011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9745fd3e6d8491e7c79fe6395c5621ae0ebfb57df12819732ae6acd9d34f6406. 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/QZFYY2173013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bde35454ab2c9fe65048a93c333fadb416bdeb65dd00f0b8c473a68b014f5d. 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/QZNWX2098359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72cf04fe1ac18b67060f3965b0692dc50f6563db2300b0c02998b3233894d11. 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/QZFYY2173016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ec427c8d916caffe868cfc2c69d89efc2fe78867edbc04b57b512d1bffbac0. 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/QZK6K2431366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c1971b0eff59e8b0fc0182fc3201941280468e354eb0f2fff4b7c27535497f. 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/QZWFM2376237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf14294ca67c358fdb517e25fec7ca0be7fa41b8aeef4207c01f024af92546a. 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/QZTB72308534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bde35454ab2c9fe65048a93c333fadb416bdeb65dd00f0b8c473a68b014f5d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:08:20Z), 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/QZNWX2098359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd62816027e9e77ce19fc715de8e032266ef15fe51164fcccbaecf28d7b0e6ed. 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/QZMEN2024494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef0d54509bafc3e09eb6073aa473c0a773744153a5556562ddc9d2daab81a8b. 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/QZMEQ2016175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3f356a7c21cd508f1884194e445e325517cb303ae6ee1fa4c529b68897550d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZK6G2048953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32c99ef3de2474377cd09ca9e357fc44dcd5201e3918cf994ad0d86311725ee. 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/TCADU1863872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e9b10758fa6725f90f2f8580c9eb61978cdb04ba9efe7795069e10d9f5f9a0. 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/TCADU1863875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c67bdaeb2625b5a14048bb61aae07808b269f83d96b91f3fbbe15ee70c78751. 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/TCADU1863879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462420a7fda3963b325cad354657b687c6c3d5d058d8fbfd9363c64f794b94d9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCADU1863881.