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 0xa50cc37c2961045afd8b24615030ea9c4051ea4ed50bf9b62a53cbe469a7ab57. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/418a7cb2-ac34-41f7-acdc-f56cbcf4c937.json and https://artists.proofprofile.net/proofs/artist/418a7cb2-ac34-41f7-acdc-f56cbcf4c937.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 0x5c657f666673f3f6215ee970b9ec2bc47e38a0d452ec6f767952d8b0dc8d24c5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZWFT2403168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d1dd3347fdd25195a779527da32f8e088d7d42cac188bd4b4d8c0fc82324c2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZWFT2403173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7dec112474cc2ff4ad39bd2c400f464cfcefcd92f02a89acfc6b37432d8961. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZWFS2455281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5816aa8728a0bc58d2893289adbd1a8675495c10d750b9d58b405e47bd5cd7c. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:50:12Z), 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/QZWFS2455283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308e6af33081fe87cb1e6531c1d85e0e4b963e5c9f763b74ee06e96f2f5cc216. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZWFS2455284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d1cd9aa9b2c63f02e41cda1c700d43164f7c85e23555fdf707951e6700b11a. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWFR2471293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f55a0ee4d95fa59279297c5196d8f6bc21fcae40fb8a367a1dc3f2f23d3d10. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZZ782412396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247016d8a5a6b14613f5affbedcba67b9b5b7304c44aa4bddf06926f4c0f1f5e. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZZ782412397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69aed56e03bc3d39ea969edf34c8aa8a16b9394e6e1ba8bdfb9c09f2126df94. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZZ782412398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96d3dd23ce09fea4df3adbcc6ca950c79a6b7df266852a40e698c0bb14d2982. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZZ782412399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db3200be954037db7923696353fb758e402a700da3ec17078c725a3628823d8. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZZ782412401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19dc3d3e8bf36d06537187f3274d71f80fb0bdd1c523ef51a7125c602ff5d82. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:48:57Z), 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/QZZ782412402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92879c72c4d464ddb20473a71aad1013a3cffe76d7a7dd865b2153f8d17b41fa. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ782412403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb700be63cc8d7e0abdc33f103e414144ad56707b7cb2a65b698cb60bd57ab5ac. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTB32526521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42d7e850733d54d1ad05ff9c92aaea3f9885d6c1efa4a2ba3db74da4590e0c6. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTB32526522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe328e7604d1d38bd6b3ef03ce16ba08d10ac113dc784a9956ce746aa75cc545b. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:31:39Z), 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/QZTB32526525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824725d1eb5dcc24af08df84669ce8e7c0d48ee16993b4674fc44611e36146ef. 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/QZZ7V2525179.