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 0x8327b481d7621b6fb56c76dde49f07cb0b7647a8a67b77ebe0ccb1d633fec098. 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/e56e75a2-1885-46d3-999d-db697e189cd3.json and https://artists.proofprofile.net/proofs/artist/e56e75a2-1885-46d3-999d-db697e189cd3.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 0x838c390cb6ade9f8d5263f1ae7b0f97efbd1d85a5e4df35596522ae240d07968. 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/TCAEE1969706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac49ce9bd56856f5eb3343a992f317e09111ee5840a05e6d2ff0675631dc2a3. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAFP2118828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7c255805cf08dcb5a5e3724d814838863764785f97f8a84b68d5731f88dfc7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAFP2118844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9058afadbcfff58af880eee538ab88a1bac2bb65bc0fa1967aac2baf7ee0b6. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/TCAEZ2057535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbd74bef480ffc8a9ef954d8e5555c1421c70f1c5bbfb778b3c0f277cd56db1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAHE2355828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bebf65bc2049b7de0d2b66a57ec5cc6f8768e21b83c7fe481cac1763dc4daa3. 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/TCAIA2450202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07d3a9afc2ef31e42cf2edd9a399339a13498d1dc7ba09e0dae5529bc59966d. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAJA2439017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07d3a9afc2ef31e42cf2edd9a399339a13498d1dc7ba09e0dae5529bc59966d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAJA2439017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cbf2a34e0482af97dbbc26c78a9980701ac869da60c10c725337bf49afe1e7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJF2592725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55b2b541252976abb34096b84e947650f05f2ffb97e9c113b884fe442c6ff6a. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAJG2592796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d1053f92ecf9c84d645ce38bd540de8b63dac7fb3a8bcd4be72f9f15425291. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:56:08Z), 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/TCAJF2593104.