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 0x1f769dcd7604e27a9da05c7eaf296fc3acd872d9fb35e748912b03a9b6c62146. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a666fa87-567d-481b-bdb3-47f9c9e4bb95.json and https://artists.proofprofile.net/proofs/artist/a666fa87-567d-481b-bdb3-47f9c9e4bb95.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 0xf5374d2a2e521c310333504a0df1847819d928d95aaa9400564cfd24dfd05a31. 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/BCZVF2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331a3389725da1e824e4ca6e41e63f543627f71e0755ad09dc4bccea491a5023. 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/BCZVF2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f0fda4e0287690db79fe8280a97017e6774f5d9d18f15df93e6e0dccd617a2. 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/BCZVF2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcb634c9c556b8c607360dc28aee70215e0494b6225701eb4cf55977de2e2c1. 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/BCZVF2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f3424c14d9dc48416bb229a3d0734281cbd6acfb67eea62c8016be38cc8928. 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/BCZVF2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e680a6290f143d819f647db4fc23afe8aafe36e6745d3ec6760f7c1dbc546e. 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/BCZVF2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cd139480c7ad38de977900a904d60b78fa7b029aa0edca23fe84d347e4fcf2. 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/BXNTX2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ceade755695de772e2a4816d5fcf9c899f22f3ebfd5b01da5dad89f6d4b78b. 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/BCO3C2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffde5068caaf4f6a62d7870bcd2eede0d5772165fb41b08ddc3c2369e764701. 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/BR5TG2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079202453212bdf2e7419d5bc1572315a15c932db7f78a535997852ec1d97c47. 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/BKPFB2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7642d94cc28aa39a36f29b054f9cf20b5d7630197294f15b7f179ddbf87fefa. 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/BKPFB2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563b3e0f87758eb65b10ebc0f0a0afafd156d1c7d5985b4d1658c67a114f017a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:35:52Z), 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/BKPFB2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52caa19156bba8f392fc6ba0af33fdc2a9c517d85546a516c403360cf7a828e3. 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/BKPFB2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35e999bfa8db296e7f37844294a45c1706c6b77778f12da7f1c43257ebdfec7. 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/BR5TG2400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb376e4022f86c44639b1b10604e9267c76f16f3bdaf4735001421c23fbe1fd9e. 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/BXZYQ2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cc30710a7fb855c97c4c7527c20229398a3e0bf6342a7f38340988d1d0a624. 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/BCHIP2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa314e166936c7a245fd7185de53057eacf6477eb9d225ae9fa5d592279eedb18. 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/BR5TG2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2f91770ecfe75061d77556e25d8d8564ace9642f4b7d0ac826429f72faf71a. 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/BR5TG1900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b0479251504340c577590eb4503c42a7a27a216aca3e73bed5a5a9a568621e. 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/BR5TG1800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87816c771c123563136641d01519568053d36c6dcded6b5871445a1645d3065. 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/BRHQQ2200013.