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 0x4890fd2b1e1894a96a875301b65001beee630272e1787a53407c821282d7dc53. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7ccd5eb-c49b-47f4-bdda-1f70d3710775.json and https://artists.proofprofile.net/proofs/artist/f7ccd5eb-c49b-47f4-bdda-1f70d3710775.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 0x3bbd3a2e47dbc7eaa677cfbdbee1023a2f6eb2e7fa73f42e711eecdff558ca8d. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ING120902220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921c013e79911b7bd6ff7b048c0dd7f13d655b8c28611571052e4de80fd95748. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/ING120902221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787e83dbbeda011c5d858f9fb03f4415f96348ef1de19c42548782633d1138df. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:09:47Z), 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/ING120902222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666bde79b19d45dd0a3fc39f9a51b32c9879193341a1a73d6f482c6fd788e90d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ING120902223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1d3bb1a656626a1f684fac7bf3d8e43df76020d1a5aef53945169e50961e93. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ING120902224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88992414dae61fcfe29b27ffa7bcff3a44230955f76b962d20d23a5dbd198c04. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:35:32Z), 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/ING120902225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6512d99dab3185e6fc762ee231a4c4333b44af03628aca9e3cbdd5ee84a5f7. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/ING120902226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd41aa7d9039473adfa367801d2ef5371fd7820f4dd68321a7287dc73d39c3bb. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:42:07Z), 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/ING120901185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595c23476436baa211eae48f65042384fb16eac8c27bbaa84e7570e8b679f9c3. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/ING120901186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa755771a4f5e77dcf8a99335094d735f7737dec7eec71fc68b61ec1e46173d7f. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/ING120901187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2430efa0e055e486f9a35381b6e574cdbd5e97dd62498172cd629af289c9f64. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ING120901188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8373d03603990a3217013a09d25a6c47359422012b5c4351b6dc297d3754a9. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/ING120901189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c0ee2623f6b0e7af964b5c9f440077155d52c6f87bb9447fbd9dde08a8506e. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/ING120901191.