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 0x797e38e48981b5a17ed0dc90f3e784b878ed95a9c47cb93b0464b73ccf1d0e98. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d70d7dac-31f6-48d9-86cc-c4f9dfca21aa.json and https://artists.proofprofile.net/proofs/artist/d70d7dac-31f6-48d9-86cc-c4f9dfca21aa.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 0xd625273f90ef8bd888b7c47be120a134fc09844875e7ca588539d196b215f7db. 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/ES71G2402633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a0cd6a75fac01063b3d759118353a08c020a1545e7ec3b8dead564a8e3ca64. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:31:26Z), 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/ES71G2422488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f5f56782b77c2f18fd79b3296966b16f0467e6404c48ecc016349f8e7c2ef1. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:06:54Z), 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/ES71G2422487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8948b9b58c7e7ef7eb85ae4d33cd6bc693126a65352ab78217cb71235f237f. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/ES71G2422486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6b7d5b1864ce41877aebf0ebead11b0c550c5105b11866ffabbb7a61b81a15. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/ES71G2421311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48e7bf4bf2e2837b012bc7a32afc0797439e6affe56abab208cbbebfc18a276. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:52:33Z), 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/ES71G2422490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f6ba7b96d30eb04b5474d4fe95b0eadd44995caa35d10e55be8a1e6f81b613. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/ES71G2422492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85350561901db93ad3883fc70de9a15f6c7fdf7d157b4393fd3f168a4b1b0ecb. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ES71G2411206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12713d4fc83621fe9319d159dd144be33708fd0b5e14f80ba247ab049692e903. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ES71G2510766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3335a16a1e3141fd7eb44d20f84272c519240dde63f95aaf4512f0e336ec1cd0. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QM6P42572851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff28d248a439052a35f1aab75ce66e23e1e0972f460c80aa4f9c91d9b6e362a8. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:50:42Z), 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/QM7282591546.