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 0x628e6bdde6018d595d7e7e5b13a60779915947a55124bedfb1bf3f08d6637998. 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/87d01287-1123-4c5a-935a-bb6e9eb7a290.json and https://artists.proofprofile.net/proofs/artist/87d01287-1123-4c5a-935a-bb6e9eb7a290.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 0x4f48569f3976b195c37d579c910212888bd4fdfacc6fefbaa251e13f7b70f670. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZW9M2244148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240bc3fc4f8c1761c139f86a6b890053f99481456728bb8c7050fc876b261d44. 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/QZMZ92521080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091639fa4f67e51c3316fea9e0dff1c1646ff05530e4e29141fff0e024cd0375. 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/QZMZ92521081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040f81a86ce4adeceead59ca5a4197d744cc7e588f858cb59b8912eda73807d7. 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/QZMZ92521082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0150ff91eabe1224d95f581a6672e39c967abe1998e90b89307268fe30ab8d. 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/QZMZ92521083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8dfdbcc35ce8d2144d1e68b32f6fdf4243d0c3ffb531eb37c3c6c52458e309. 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/QZMZ92521084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a2b215daf8ea3d21864d0340ee89f478f7e8ecf7f341d1e357a758a1925ad6. 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/QZGLS2596756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f18645f2969860c153e9fb0fb633fbc09e049e63bfb274d7953d038331cb34. 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/QZMZ92521085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f75667c32fff3407b76df6e4d3aa30f584e75d23aecdc3799ec6b978aced00. 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/QZMZ92521086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0eff5347e6adba19511590b158510fa48286cfbddaeffd08d0f93298d27935. 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/QZMZ92521087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153d536774fb11cebe109eb0188ff5995575c2b8b963143ccc90ba963161128a. 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/QZMZ92521088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841b2c21fa6b42df991e026335a769ec910ccb59880d1565226ddee80ebe3d9e. 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/QZMZ92521089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab202e937ed05898303821b13d92b9c18c325bfc4bea3f892ddbdd1aef8bace. 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/QZMZ92521090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22cf2e3758ac4752103ef01c2396f8afbf13de1824f03c9faf3267fe99d9945e. 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/QZGLS2524686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98ee1afb20d9fc6a34d2775da6100f3d908f8bc8ebea9867cc76543505c172f. 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/QZMZ92521091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245b6b580cab482ab1c840c7010eecf237df7353a44ef6338970c647c6a932b0. 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/QZMZ92521092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a2bd2cea060637076a5439605e4c19c09254b4352ee51866681b3de07a173e. 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/USHM21889136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf94d4e27e0a64012fbba80005663bf78e2b990146118bbcd17b6119440fcbe. 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/ES71G1921042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15c9263c3305c0bb8bcf2d09c01715322c54680823e7dd1436f4752e78e5839. 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/ES71G1831094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5959d2c0a6112dc1516d6062ddbbe3ac8c48161d741264d83fb456a701fdc2ab. 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/ES71G2139460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebbd380c45b573991384f3928fc0a81928d475ef756bd30fc7219cab7dd968b. 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/ES71G1932329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812bef17c2ec3534ab4b7f7edcfb6833042be9e199d5339224b3ba896072e1a2. 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/US7VG1773375.