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 0x343e26e7dc0644c879c18aa61fff4502ddb97a5b74d82a9dc8b51061308e85c6. 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/d03d03f3-0b94-4839-a768-e617f22b03ad.json and https://artists.proofprofile.net/proofs/artist/d03d03f3-0b94-4839-a768-e617f22b03ad.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 0x9b9fe6a7fcc1ed78cf431b0003dd119b7f5ccc211afe6abc36a925faef2b72f5. 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/GBMJG1613748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c295131a70b3d2ef77cd912fe2845b15064d4abe539974dddb2d843e1ff664. 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/GBMJG1613749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d2b768d4098b5108cb9140dc67e2fb3be3ab4f8ef3bca7c00b72bb8d564158. 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/GBMJG1613750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88af5b7863537df105a5de45fff7bc01cce3ecd03ae5eee28bcc41d7803f80b1. 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/GBMJG1613751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c3e551eaf044182400a6eb87f61b8139bfa18e054f2b3a62306c8e954af46f. 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/GBMJG1613752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bf32d03315656367f958f3319186df4bead7e090936c54724e5c6705e3cb59. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBMJG1613753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69b7c67bc4ba4e7de500d1f29a4f730089a3672e8e29c9a956f5bc1e3db2a24. 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/GBMJG1613754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3aaadd0868fc4b1f98156d51521c206566009ab6c8c45403bdaac5a5aebb17. 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/GBMJG1613755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503a646ceab806e298ee9cf63ddaa44913d367b651ac3d270d0ea8619e8c6c1a. 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/GBMJG1613756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa122dd5593bff242f43b727dc1a6ff4d4e81ffeaa5e8bacc7f534f51390aba23. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBMJG1613757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091b15da73bce844ee62a6ae009401ea797044b575eb890dd6c693b209e98f98. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBMJG1613758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2162c70f5927be3f125a791736d12b27120a924f521d0f9f639f5484cd95fe14. 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/GBMJG1613759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983c245a269ec85f7b803237bc13e0c7383ac51330f0dd31da981d9efe5812d3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBMJG1613760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f367c862af412f29ea5496823dad7672eb43aaec7bc09688b62a922e3ca57d2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBMJG1613761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b57d33ba23146a9b02e1dc9da0a308957e8013c7cd4c036ce13f08d085ca4bf. 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/GBMJG2209187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0aa214266a8af6adc6ba2692428ae65d52feb6094ce3068962b83882e0b9176. 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/GBMJG2230059.