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 0xc731150c3e05c66a39f2f67113d13da6118ef42f5d4bdfd0dde3fd33ee463bf6. 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/16e07e6a-badb-4798-9fef-4d1ac6dde8ae.json and https://artists.proofprofile.net/proofs/artist/16e07e6a-badb-4798-9fef-4d1ac6dde8ae.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 0xd054c5d47af6abb51ac4058cd8436264b00c5d19a1eda76215c6f0565cac1230. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/TCAJE2572331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e5e5e0e7f6f207754d00bc507f2e61f3a7d5325c64e34d787cc78e2c274f5f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAJE2572336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a4f91cdba40b8a844d1be43941d11d83ffc880ab5ed605a62dde1ae3a0db4d. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:49:25Z), 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/TCAJE2572340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890f7441644f345742471bd84e0c9266fe2000c8c3999b9b0eaae099d56d8d92. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCAJE2572343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134d9cd92bc3b90ccf46459d22a3b1b332799151d7800ea6419bf6a846e63a9d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAJE2572351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd9ede35a57d4c65faf7122352610cce0c1b7c6a84d178a3397354af74003c0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJE2572353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfd26d88cdba634634c1b911e21f0c62ff09811796e43fd7df9eb1c69c0ee67. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:05:48Z), 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/TCAJE2572364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a539d015c772aa8142b62e555b332ba83ab6b60dfeedda55af92f24f4477cb. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAJE2572367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e95c7fe16bfd289bc412972688952f95d0f83213c3586178830fe95d5c658e6. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCAJE2572371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f57ab3b3f5548db0813d7da0c8ec4a97a96ab747c61da21503aa3cde74f6ec. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:37:49Z), 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/TCAJE2572373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37de0064e691a0b79176ecaef5ab4c4c6a582dbffabbda2592789781f0adbc12. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJE2572379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea74299d537a5ae3fd48b214233523e365701a0012116d5a339a06deadecb54. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJE2572383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68be8de0247d7da9bc65d6d8110687c2ac554f832fad42c09dee5e4f39f2158. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJE2572388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0ee7295182dd7c1f07cf8694eb5213237652bfad23d4a3e3d2255f678fd088. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:54:22Z), 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/TCAJH2529093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fe0395a46fb99330468aa653be26d04b3457d1c237f765279431b8340aad0b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAJH2529140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8882f2b764e2497c6617233a8df0a445a60345b2f386a857f8053b5963c7a7a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJH2529149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc11b0fb7f62946f04af0e7f79c7f2c3a930d6fa99a1cfeef4a03fb64dac648. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAJH2529166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc565b40114e65e7054d15dc3acaa44cc7dc3f51f8c0cb6381b3d658e4f29c3. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAJH2529180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1043bb2ef4602b840730baa3b0966d17bea652181e4ea6b4f0cb9b8980625b. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:10:41Z), 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/TCAJH2529191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c43f4066560889bc4346de9dfdbdbfc5a88b76a75515485f6c95c317ba4abe4. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:00:17Z), 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/TCAJH2529205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e37cd8a0fa3689f5e5bb8de54f5044a69dfb9a0e48a03f6d102310da6593cf. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAJH2529215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81c3be66dcf12cf9aa091840f5e4d70b177c2c8333e51c6c60b154ac0887bd3. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:14:30Z), 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/TCAJH2529223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687feb3accd5f6a59e470629a05a984641f4b09bd94700c6ba89136375745790. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/TCAJH2529238.