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 0x930dd3e2d5a2b0c69bf7328cc6dca16d0322bef267a7961c3e0b07db3951651b. 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/d379a9a9-6e54-4de7-af3c-9477f1a4e329.json and https://artists.proofprofile.net/proofs/artist/d379a9a9-6e54-4de7-af3c-9477f1a4e329.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 0xdc9383fe2a7ff7dfe4dd137904bba9ed8811a1ecbbd38b2038da23e7b8bc54e8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUM72219387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8129e444418c2c43fca4302418f78efd15282372729cff61bf21e6f34dcde4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USQY51582127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7233de7bd9f3cbd6867af91edb3441afe992d57cae3a971aff5a26c1266155dc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USQY51582128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1889ac0a41440c337ec7eefe6afcd20723e6f0e24c4f98c7b508e545b09967. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USQY51582129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb223216b2d116a066a8dbd402f270e1f1ef664d99692a1ffdd6cf62e5efe39cf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USQY51582130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9bea10bae6951046c2613bc25e702adeab411310d61fb4c82e6f9a5e1ca38c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USQY51582131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc374b9f6c53c03d61e217249809d10b608990d15b6d899809b3739bb022b6231. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USQY51582132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c19d5c4a2b8bcf69749c9862c7e56e26754e72642ad84cb6aabcdb6aeceed6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USQY51582133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23be48192c66fc84c65aa0196a9954d660965d827acb50fcab1d3ac63d773d87. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USQY51582134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da71c3c62da797cd6e5ca05ccb44b7bdaeebb790aa2b750ccbcec76ba1f1e33. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USQY51582135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6685623e5b10f0fb91a8960addb343fc01eed2601da7e3b92650d3c157086c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USQY51582136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f0a4bca6a5c34eeeb60c8a1a388235f0aa79fa13c71c39b3105e4703f824f4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USQY51582137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c641958ebdb1eafd9d769425ce6d8ed6d684a1ca1f81a37c5b0e2f168344d60. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USQY51582138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f751d12918d0e90503127dd7fb7829e99d78bbb2eb949b5241ef4b823ef9967. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USQY51582139.