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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81af3e6f02dcbc813b1326b65c8a89f731b5cdc1c181b931ee1359d1b921d14. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c3fca8f-4f52-46dd-add9-8c8483b47b30.json and https://artists.proofprofile.net/proofs/artist/7c3fca8f-4f52-46dd-add9-8c8483b47b30.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dd78db6ef4d5e3f21baa8033bea5d1fb8f95725307baed609b532d0e64a9c2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US83Z2346554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6756f3480a74f9ab1fd88ee7ae457a2a9f31760ae6a37870ccb38752a1080270. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBLV62308067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7603a8c6ad1a573353b0d84a392cbb74a65e2aac05cae52fc86895c3b5953362. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBLV62308068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c265c38a8f51c0f8e4e171ba48f189bc575e321ee6b1279f0e91e594a1926cd. 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/GBLV62308074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682d4a6eb7f76fbc780aea96cca4a688dc7686ccdd58b5baf05655114f17bcc3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBLV62308076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb18f7d4f7822a40a85b79f0bf131d23446961c1b3bc8092fdb9c285ed0496ed. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBLV62308083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9da4f4bf53955ac39b20f43e4ee6a2bfacbd1b0ccf866881cb8c5d6870d1696. 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/GBLV62308084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bd830de386d7f04b3c59dee311310b14e8dce29b24f515b13f64bb5e45ea40. 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/FR9Z62300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9cc71e1c2b8bd0a1db701316aa9ac61351be7c79d56959b4ba6efdec2fa543. 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/DECY51901784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5452ac1f57bb5b2b599bed97d17faf556d984064fe10b0925b43b366e0c047c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBKQU2411398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe175f34558ff5bfef5b8779969e1886915815e01d50cf7429e50d313daf58be1. 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/UKACT2371816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6e03037164f2cb722ce4bcca3e0a20383b9a61495f1d8ba240a2266bb1af07. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9Z62300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bd830de386d7f04b3c59dee311310b14e8dce29b24f515b13f64bb5e45ea40. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9Z62300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3e171e72edda4aafc94cecba3a74c74f0421f08e785b6d7ee27fb980284003. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR9Z62300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e7beccb98dfd0394afb3f41de7c55031dca7a06d6be97f4ce98d2b4d67f6428. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9Z62300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f79db48c8b00e538e38eee684e5d3833268e7aa68891190f265abbb393aa97f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR9Z62300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6957b2a3d2942de1610f5d39300669d380da08c82d597234fc4c32eaa86a76. 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/GBLV62121916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4bf12d903598f8499cd19bc074b709fa2e5c7c7c714832cae05015cff9b858. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FR59R1895827.