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 0x72a4b5aef2473e0dfc97666370e1c2c5bd6c2cf156b2b701b6d84c19453028ce. 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/630cb555-708a-4eae-a356-cae1f7e37f3c.json and https://artists.proofprofile.net/proofs/artist/630cb555-708a-4eae-a356-cae1f7e37f3c.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 0xb8796f225dba6dfae60b83c89ba6a73510f9cbebe09296a0d992d7e20535c2e0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:07:01Z), 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/QZES92408785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c50133232b2bc588cd3e320406c277acbf647dd1b509d90194c574e0b0bb53. 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/QZES92408786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50945afe46c6c698d42a1bac9a3d7993b34e1b4ffba56096afd3082eb13f397a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZES92408787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2ff08f7c260c72afd228d3c26f7eb507a0569670f802ec3e3dd59d62e40e07. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZES92408788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab12cb9c47aa25d863cb252eba332296768c44988ca370d18ecf63aa28d8dca. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:59:15Z), 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/QZES92408792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7510c158e44db16cced973d69cfb28dc34fda9fbd02c41f38d81d4a40d09f82b. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZK6K2495820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7467e11b2dbaba6f2525bbab1e8fbdc6f8e48c357a9fd6f310b498a7b098222. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTAS2459397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb896d65fcae073534ffef4b8e1ffd6a2bcd7ce1d7197237b1a12ee05906d70. 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/QZTB42433448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d42bcca14b334a3e84fec618a86381392d5672927f84ea57ce151870b2a64a. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTBA2424533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284eafe600d29895cac2ecdc943989cc2184a4fb59fc94f42767e23b592c5f34. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZWFV2475383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb52a44cb33b4d20df03fca9d45969e8dbb1318a9b2fea0b3e7af7a677716561. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZWFV2475384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7510c158e44db16cced973d69cfb28dc34fda9fbd02c41f38d81d4a40d09f82b. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZK6K2495820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284eafe600d29895cac2ecdc943989cc2184a4fb59fc94f42767e23b592c5f34. 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/QZWFV2475383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab12cb9c47aa25d863cb252eba332296768c44988ca370d18ecf63aa28d8dca. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZES92408792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84107d8ae1885a386a3d8094402e9a3654475dc8a6fbdb28ee1631b1971e3bdd. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZNWX2404960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79e3d741f31debc8439a6e8a4c00094d2fa0299d9b2a514cb9dbfc40fb40aaf. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZWFV2475385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8796f225dba6dfae60b83c89ba6a73510f9cbebe09296a0d992d7e20535c2e0. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZES92408785.