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 0x2baa9a7c988f85e9bc6b08ed7a44eea8b41ac5d5fc9baba71a843340ede14e8f. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7247879-716f-4e2b-a02a-d9cc35ec724a.json and https://artists.proofprofile.net/proofs/artist/d7247879-716f-4e2b-a02a-d9cc35ec724a.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 0x968bf60aa46eb6bb6f262a0f0509a9b6c21b0340504640c53480b6a44d0d87bf. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USA4N0400397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880308622560c040f210f6610a2aca0906b1d810933f3aa07540097025912a1b. 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/USA4N0400340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8960a73756b87c0fc5c1f65584d2791d22583210d5b5272157a02ddd030031e. 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/USA4N0400342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ffe37dd39b8afa83c7eb4b82a02f839b8d736a96b57c24de1be90cd05b6b71. 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/USA4N0400343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbc6567f36a48cb01779ac98751f27de19095948093b06ac2cfc33a3b78712f. 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/USA4N0400350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176151471453a69845820e618efde6932f11ce45a408c87921959c3d6fd52df5. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/USA4N0400394.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bccd6d38a6a1125f52e0f1b0aa7dde1b5a0d7dab49a751254fe580ea81a990. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USA4N0400395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ff1102162753bcf0a5d88013ed0dc7d67195a12ce0175f6a6f34518fbddf0b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USA4N0400396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46df90daade95bcfdd7082f012cf7957ac38b1e5aae774cf4a1db3c9db59af9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USA4N0400398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c451afac6067c1866d65c54009430ad90cd42fd4731c060457caa416d0431b7. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USA4N0400341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5822187511fe12ba1a859553e68629a6643245d909301200d853370dcf57946a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USA4N0400344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e121443ea150519e9866ab60e48e83141d2bde55aaa9c32f976c040f1b1b97. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USA4N0400345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aacb0390d3e6df9c82fa338fcb9d66433386cad77a5a1cc72ff551e8464bcfe. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USA4N0400346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa0df8eb4d86f673b611431c09bb3b995a1300a74d44c7d5f56b1bd9a59e907. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USA4N0400347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad243ad9a1f3ed885fff0aee1b4f02b7dfa2f8f00f2b542d8f8e2441e782a7cb. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USA4N0400348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae039d3c109876b4cc195c0fbb696ac5f914f97d66ade4bef18024033f5dcb7. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USA4N0305661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29beb6fd166589b9a444ea35b553d063a8bb127ef2a88b0616909ce13b62003. 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/USA4N0305672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca67706052213c19305c022fea41fb1980b2db54371efb5f33ca9a21351bbea. 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/USA4N0305674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044c7a29ef8b121b2c1d7e9ce9a5988aa662574e87a2427d39ab925853d8045b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USA4N0305676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4ce311bab10db81b8c67c0947257de4b09bd88b26b810ed534320c9d0d06eb. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/USA4N0305668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fda0f1be211bae5055fbe721639466f41c740033e10167e82e6a5e6d8969ff0. 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/USA4N0303877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b3540192a66637674300964d3db23ad547c039ad1f67dcb5024f2bb934c92f. 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/USA4N0303726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5895e1d97ed6994db42d8ab6b12a524ff42101ba749be89e9dd525249b0fbb7. 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/USA4N0303730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5ce270ef45522c0a1f276f75a99f041e82eaf4a1c4a13c2f0f455c429064a0. 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/USA4N0303731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bccd919df05c3f9e22f6fe332b61f89550c09aa2d12c91e85de527f46080fa. 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/USA4N0303732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76493e41da40a2124f3d1a784e06936253fda78d521aa7226d6ed4f7a09ef251. 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/USA4N0303733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8687105d45d8cd1f472f3481ef2f4bb6609d5ea8cd3df00768e1737d23a85a3. 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/USA4N0303728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4701702f65149a0793b7ca272d6b5da40db85441b20b23226d18fb493215c7f5. 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/USHM81841525.