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 0x69f69c9490b5c2548b4e63158de82b1b1c28371b3f971f70eb5e1c7611c4fafb. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34521275-0e29-405b-aa9b-554de2dbf5ce.json and https://artists.proofprofile.net/proofs/artist/34521275-0e29-405b-aa9b-554de2dbf5ce.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 0xa12e2bbddf16931b6f93ed7244f454ad9a8cc1a2f9abaff68efd50da942f8871. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:09:21Z), 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/FR59R2238716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98379e96ce84c3bd773f2eb21c4de70c85e6830301fd3fa87864dca086034ce. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FRX282336494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f005c5e328e1e78d66b34dceee1841bc31e9bb61762842a4be19d1c24bcac6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX282336495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1d28999ffb0a98d1df0e137db84694a69fe1a65c444d58a737a52d3a257660. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FRX282336491.
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 0x1070129fde76c2e682c75f3a4f0250521a8dcfb0afe17fcf6757fbc90724883a. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/FRX282336492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a10304e063c855679d62d921736cc5ff6a36dfe062a96dd466664cb29776b0. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/FRX282336493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bf8c31f97973016239a5c8784069a7291d097dac1b992a4c6499af7adc39ab. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FRX282336496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b8024c31307673c0e228f426f7b6d1eed557cef5832dd73dabdc60b2ffee28. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FRX282336497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b209d677db6f42de11d21be5d0c08b0949d1a1145d61bdbf02276ed32375f9f. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FRX282336498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7436f9b7973ff0cac76ca3c4ee7bbd0b02b712e2728b45debc19e389e8b1b58c. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/FRX282336499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd614dd2b4da846aab0b5a8cb40e497313baf30abb416bf53243541ba627855e. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/FRX282336500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc4a922ca6c6b0cc26ec0a3d6f787a936489569fe7f01dccd2eca6a87955d3a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FRX282336501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05099840aec2801a7262c341b0e8f22073e4d3ec330b6219cc88ae095170688. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FRX282336502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa6bdce0fe95c86bfd22019cd30d0b91c1b8bff9ba7c376573e83b2307af76f. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:03:27Z), 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/FR2X42583625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9b13fe728de1b2ec70c8b42fce75069d56855f5b5e8e6d7d55547818a7a907. 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/FRX762412743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd681a16d8dc07581acbe07ea8aff7e4687c98ed9f14a982701364d49ab74575. 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/FRX762412745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3179eb2eba6e607d04d94f7545b35a30cd47fff36f0a664bb8cf407e92c204. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRX762412746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ba40be981fa1bb2478f1d0bbb94bfaf201e1729eb7f83862fb66399d36afce. 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/FRX762412747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50702d7834f8f259f0a0e9720d649bf1ecee7dc3e27014d0c6da558fc6c17de9. 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/FRX762412749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17591f1163f50ddcdc035a66a7d1bc4f9b20d6f1c6341e08f51463badc7c6ce3. 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/FRX762412750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b727a589718946ade8e8247e0d42332e096cd5d6c024723df4ab00509d0d4d5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRX762412753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce33753e03b9ec9c980ffdefbd8a0f9f54af3e5b29f3a1e6f865f96f2726a5b. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FRX762412744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fba7de4380f1f892407e99461eda6ff6a76d0fd7319b699a914c1d2106e1c3. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/FRX762412748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15882b17a6217d5a65d532acbbfc1dcac930d2f205a96df0149cbaa7c92e1a48. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FRX762412751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff019523e105d117f1b44b5a8fae353a916a2791effb037ced9b2a4f410c2b8e. 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/FRX762412752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65888162239a7b1b82ef16eae05f33fb9a7481616e3d645e5593776e5ceb85ea. 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/FRX762412754.