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 0xfd19f3279889d93e9635c6c3dbf1fd471854ed70f78751f478533aab9a17d965. 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/360a8db1-cc47-4b62-9f53-635e1ca7c323.json and https://artists.proofprofile.net/proofs/artist/360a8db1-cc47-4b62-9f53-635e1ca7c323.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 0x86e6631f3b92bfef7cd5f552bcdb0d5b96294532a3f4299645b55cf31d13e597. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/UK43Q1906708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359c190ee888716f38e8397807570167ed81e687abdfe57e31289c39a1a42238. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/UK43Q1906709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956950916d3ef7252f784d01deaea4977bab52df74d0527826786b43f4de3528. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:51:11Z), 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/UK43Q1906710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff266bbc0abad7106d848cee6ec452b920e92c19dde9a04137ce1d1e1ff09b2. 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/UK43Q1906735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc001e86c8fe9d26d6f9d5a65f3e6bd47e6cbde912b18c26762aa0d38b3f684c1. 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/UK43Q1906987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a84d1ac88447655a65cfb22c25f18cb344b0c57f98d3e5252b64d778d049e75. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:05:46Z), 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/UK43Q1906988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4364204692a2292c26aa3187f70982fded0cfbd27a0b10b6e22c6bcc8a1f15de. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/UK43Q1907099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5779fe023c7d8e5a34218847c4a315d9b213312dc6c7e9236c66c00499672ae. 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/FRX762597555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7b4f112cb06672d794c453abcda75c35d77d07ece1d001e2d330c184e361b6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/UK43Q2181123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7aa81ce406253219022ce8306743bc26e80cb450c39e8fc69629764ecc19e21. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:41:00Z), 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/UK43Q2181541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0c084a28ac686d6547e264c26b93e86e50be0cce8fefe6b5f3ec9b2513c567. 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/UK43Q2250408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f22f87bf97cad504bd15d317872d104d8a008342f2a97e16bd7409012f6e757. 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/UK43Q2255230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfe814fb8f0fe63d931d6c77a1c7d7f26b37bdd8c0a2e11e642ae8dab89dc06. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/UK43Q2339594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dabb243cf6a5ec02d6cf3a0a5e19a40ddc0c595d8c67e935a21cec43015f96f. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZPYN2461731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498168af0ef575bc7f338cb7f6183bb5677cfe8149545a26aef38c91ccbaafc2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ESA012426857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7b0fa2796f1917793ef62587e34561d4e159986b7d8ec8904d44ab843d4f1c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ESA012426072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70c5556cff1c8ca0b541342997071bfdf3426973a3932c858c9d391427f576d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:03:43Z), 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/QZWDW2555721.