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 0x4c5ec88404023f34b66e1463b462036449a30bbbc3eea2f2b3b4c2fd037a7de9. 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/9941e2f9-7726-4736-aed7-a7e711baa264.json and https://artists.proofprofile.net/proofs/artist/9941e2f9-7726-4736-aed7-a7e711baa264.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 0xcbf120b5de4cf31ad4e2d02af3cdf6ac5a586f38f56d6825768f68558645b42f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6P2189579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e03682e95a977bc8663dc22b53fe64efe2927d97acd7d4965029be7152d47d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7M2409354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf93782732398f32e1b3794ed08b5c3b1d6edc57454a3422d1d2b9ce8144286. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:40:20Z), 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/QZZ7Q2404899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a4cdec3c3af6410304a12efbbefc7d655f685eae81958567df8c01027ffdae. 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/QZFYY2585901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb371af60aa04cde80056ef5b3c4041290c94398522ffb709ad4f2d685e73e954. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZES72529383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000a23d8270bfffb39e825c9dcec93c00e3777085cc49908208818c494608c22. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:36:30Z), 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/QZES72529384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8876249009d79a4fc177355d0a1c2c48e80953e27f482a6928911603d6f0b5a. 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/QZES72529385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d286df47992b829a89fa08fa01c44bb8c2648feb7ca8e64d27abca83c43a69. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/QZES72529387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb906669f8632401c737df30b354bc2fe1efb94f029d4022b157959c746e3b49. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZK6N2515067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76ec2441f461ba4499b6c53a31aed3507aaaf1298a9a8d58424a48d8dad3166. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:07:59Z), 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/QZK6N2515068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb4c988c1f4ff400ac40b47c7e24523e40b5606b8b7e042dfe9d7b44054ab9f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6N2515069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06078c642502ac966200d297f49c2fa119c280c10f49f91c990a0e485a5f51e0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZMEN2581727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83604910aeaf12442a74a2fa097308f7a9a7fb940960b1a75a923e0b2c6dbc7b. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZNWQ2544056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba5ce92ce08c9be0b0bb94c9e94b9a046f59a79793c365088d2138a88b5622e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:23:57Z), 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/QZNWT2509716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39eed9eafb7d16c5bd9de91b79540eb042e51532d6f03a1e89c714a1c4fd104. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:00:05Z), 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/QZNWT2509717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e29f6e90b6a0eca1b1ebf3b68685456520cc2f794dbf5d26e84d9e08f429d49. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZNWT2509718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ee2ac7b9391b13bc862d2e5a4f9136fcaa778e331ada53426637b64c37b72f. 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/QZNWT2509719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf570e6f09f3d144cac13935704fe45d9b29d0159d7a2a43d14b5558cf8d6c2f3. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:16:27Z), 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/QZNWT2509720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42006bdf2fd2985079c567daf759829a1a1dc243a9d0a8e5315ca06dd38a2ed2. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZPLS2537858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c97cb3dfdbca08735fa1a60219e8c32c8934d239ec9530ded0ffeabcedac535. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTB72547098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0683832d0a1f7c7ecf49cd862f59b068d72d1ffb2d7c208213fb0d237fe8e71c. 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/QZTB72547099.