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 0x5d72f2f6d5e8a05b93686ac36a24766206142f6cb9202e69ef4a8f7dd126534a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10749b34-bb1e-42a1-963f-d8d0b52e46b1.json and https://artists.proofprofile.net/proofs/artist/10749b34-bb1e-42a1-963f-d8d0b52e46b1.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 0x9355df81b07ad6fd6b6c3be4e2949661e8b8d1689a402a264b27e8aa1e3ef384. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBEUE2400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3c7f4100bc7df740019114df91237671e46363e7fd2097a9ce82a419b459c9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBEUE2400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40055562a2dc75adba1e762f1f138167c9fae48e9896fa84f050f49e8650d132. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/GBEUE2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8749ddef758e64152f8a84d3c005027a044d93002085c5b56bf019d74098d9d6. 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/GBEUE2400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28a4d526c8f707658894930fdb985e72b4f1a458a72f453d5ed8ef06eedee66. 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/GBEUE2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac817286bfd29dd7fd13875172016bccab4a0612672646e5b2443af97a099af9. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GBEUE2400084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cb808e96011429322a0d810c4f456b92af9806dbc882894153bc8b20028c16. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GBEUE2400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8d8b8e7b3895e6ff4f69c74d288f5613c5342dcd21f32b8f140d5126035ba9. 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/GBEUE2400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988ddb4a3ad7a4767543db988ec2994ad80743334d7d37d9a11a3c52124898b3. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GBEUE2400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd213b27f1761f6d5d7af565638181b8ec7496e1ab00e899dd6564e252ae0c036. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBEUE2400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9355df81b07ad6fd6b6c3be4e2949661e8b8d1689a402a264b27e8aa1e3ef384. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GBEUE2400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40055562a2dc75adba1e762f1f138167c9fae48e9896fa84f050f49e8650d132. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/GBEUE2400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd213b27f1761f6d5d7af565638181b8ec7496e1ab00e899dd6564e252ae0c036. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/GBEUE2400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8d8b8e7b3895e6ff4f69c74d288f5613c5342dcd21f32b8f140d5126035ba9. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBEUE2400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba21c5d6e9a6e3940f5544a96ee955e453f93eecf74b5e4c9ab7cc117d4bbff3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBEUE2400228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba21c5d6e9a6e3940f5544a96ee955e453f93eecf74b5e4c9ab7cc117d4bbff3. 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/GBEUE2400228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba21c5d6e9a6e3940f5544a96ee955e453f93eecf74b5e4c9ab7cc117d4bbff3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBEUE2400228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713f28e184974056dd3d3943c961f4c39c7ac59149e2e91a904dae9d8198da4c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBEUE2400283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f63e8431756849765503191986024dd2e877225335b6727d307a07fcbe4ebc9. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/GBEUE2500097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3241423bc8a323dcc155ef016253c001210b7e3e70f7d2b8abb05800946794. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GBEUE2500098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b5a47f2c3d9258094cc35722d2865b57e97c5e3102c2316b9118b0b4dea17b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBEUE2500099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd213b27f1761f6d5d7af565638181b8ec7496e1ab00e899dd6564e252ae0c036. 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/GBEUE2400105.