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 0xa04463373d3fab486f78a44cd612f4431a4f34cfab80b68d9b056475729a167b. 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/dd1df4e0-7907-4d06-88be-90eb99fca97e.json and https://artists.proofprofile.net/proofs/artist/dd1df4e0-7907-4d06-88be-90eb99fca97e.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 0xf5bc494f029a58ed22f4254545a878470c37c2c7be3b168b96e874752e1b2614. 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/BC50L2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490c72faf9e55dc4dafeaaa05e398bb5b87cfc0d26203585208fdd271170087b. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/BC50L2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ef5952675c14c7ec8e3158a967885fa8baa9248f938f6f649f0b9b1428e7c4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BC50L2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b64e848e084d79ca57fad6590c079e82bd93e139aaab62fd0d3528e22af051. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:05:02Z), 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/BC50L2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc37a8fe5cee23e7ecce1e5b6f4075f0201768c47f4e8747348605f614ea50f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:57:16Z), 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/BC50L2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8c32697084f40bbf17d745da61a52a53202e281878ec59a5a962c2ed7d8739. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:02:23Z), 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/BC50L2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b64e848e084d79ca57fad6590c079e82bd93e139aaab62fd0d3528e22af051. 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/BC50L2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ef5952675c14c7ec8e3158a967885fa8baa9248f938f6f649f0b9b1428e7c4. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BC50L2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dac482403429578310e4fd26e74a6c04487d47876708b9b4d3d3d11d53f2078. 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/QZK6M2004916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42a7e025123454555a599152eb32cfefef8a44df069211fc97b8f2802d3dae9. 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/QZES82050109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e77d059ffb5afa8ed870b7d782d07fd8abf8356628b4b2b0cf0c6c88dfac64c. 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/QZES82050110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f4da25fa4fbcbae0629ceda7fb039008bc6f64ea6db989fb01f51979c3d7d8. 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/QZES82050111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f9b1c156ad2c735af91d3c2ba0fd77778a06d872475eb2185016e58b12c595. 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/QZES82050112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc6c39008732f99ae4224e3c977eb6ee487ec86520f3b3a6736de4382410dd1. 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/QZ5AB2069609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcee1015b3146e9a5d6f6a0ab3a242bbf1ebc8b2d3538f2cb63a7c6a417fd6ac. 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/QZ5AB1981577.