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 0xb6caf4bc315bc1dfc5bac5696897cce9c4638ba2a3164eba6f59a34be12dc522. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd349837-35dd-48b8-a1f3-85b98f22ccd3.json and https://artists.proofprofile.net/proofs/artist/fd349837-35dd-48b8-a1f3-85b98f22ccd3.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 0x3b5f660ab9628827013aaee053bb3e9c5903a1307e6bf90bf46bae028aa518ef. 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/IL7532421551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd439900c9a29e409e42d9797c823980a1779883cea98c04dfcd6081d0b4e65a0. 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/IL7532421552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad5996d82192d680ccac0f749f3d4f37c0dd18ce689dd75328af988a5098564. 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/IL7532421553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5518e25e48ab80ef8185e4f18c910739f0c14ee6be131ecb495fbf91f1090c. 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/IL7532421554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd644ebc90ce14226397c964901cef73af82dbfb83d2ea36e03f9d92ead41ccd7. 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/IL7532421555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1a36e1a405de0298554a45115774f40e8f366283d1d62c75a79a34e9e6ab40. 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/IL7532421556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e76ef5fb674da753a173b2adfa93a91a6d5dee8ce3e7abce6ce1d5f1b2cacc5. 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/IL7532421557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2214598961379909cf805560047a7127a39ec9e6930fefa25e522c80ab515d. 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/IL7532421558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702abe5d44489f7d02628bb7a1b3b3b0024810bb0c90914d6f1bf932d9a72e0c. 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/IL7532421559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163317f88e16bb1f33afefb40f9629a899447cd4e518bd4066e8bd8d0ce929a3. 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/IL7532421560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dc6fa9c7d9016adacc0775c5fa258e70c2327947391078d681d5f1781f2d51. 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/IL7532421561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1fc0c695c7b85642c1c8e375d60346b1f9593a95861954f9b6996e9ce52e8c. 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/IL7532421562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c26a8633f7ddcbcb88858dfffc5fe0973bcf53d2e7fc56b13a249d0baba0408. 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/IL7532421563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e0000d377e7ee6b78ed837082e06b893255123fd10b09a54a9bc84d3b28dcd. 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/IL7532421564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac3a84b3c5e6cbf779bd4151ee6bf5093c1eea416d7686d36f6ac546f3de111. 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/IL7532421565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357edeaecf0a2f19c21732e6fdb84351e76810694153cea06c649a89041c13c3. 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/IL7532421566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec386c60bc89c0e95e1ffadbb568f2b87033541362c7c2e6825803970147f12. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/IL1042405231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d7b345916d5c75679fdb90eaf7bb93411766c6e9bf0bdcf7b084ade4654345. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/IL7192500325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62f09330137dfbfe80850f90dd5cdd2c3993012dafccb01a96ad79355a3c330. 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/IL7192500332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c206e2fc9327053730b5ee570bfc2881a5aabcc1df95b05835e2c895014eaf6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/IL7192500333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b062988287aa21f6a2d0852207186f2a2f79e607450b0fbba33a73b8b1e90b6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/IL7192500335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c886014be990a080a21e8678e8de649776b3e0fc54f121ee10fc896420dbea. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/IL7192500336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3161a73a4dcb2968d098369c8a0f878a478614fe4339d4b89c7ff836ae90dac8. 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/IL7192500337.