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 0xcce2ec9a00710a335ebf293ce737c2299ff6c19807a02bf7c798dda7f22cdd65. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc56ba06-f154-4eb7-ac38-ef03e20ce84c.json and https://artists.proofprofile.net/proofs/artist/bc56ba06-f154-4eb7-ac38-ef03e20ce84c.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 0xc109a0d2b7ae394421a01f2503fbde1acbed273e0c940f91f0e448a784fe20a9. 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/QZN882593467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaeb7de8542dd5c157c842cd6e3699b34709b05603ec98b1069221c295879f2a. 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/QZN882572208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909471211830e92f7e7bfb4cf422365fccf3d604c316ac7ca0efca4ebf374320. 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/QZN882554399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe083ffd322d57adb787af29d45095fb1bfc507936f34c578dbff75adce213b0e. 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/QZN882554396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c43a6d1477744f00a710a73eb7ee7cc69a17014f5870100b3c6a3de13493df. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZN882554392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d82743a2d514554e522a6d88eb68867fa98a28819082ba3d7bd7bc8f8409327. 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/QZN882554391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1030330751c2ee24a04a63db56a441766332647631bd2b999856d8428291611. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZN882533856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb150d90ebb2967d08d1d543dbe9a6ddcddbd34b5f610adac53cf76ea35bf3ce. 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/QZN882535371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d59f8a425ea76361b2edc6abe532f0a21d76fe54569dcc6f65b764a302326ed. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZW9M2420407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18c48975d695fe8f1ebe1a1f0dd25e205d23b060dc75ccec3819bc0a570c47a. 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/SGW502221567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f0af7725964e957ad5d337cff7a806d6a119a13da6f6d274099a8ebc6a6a1e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SGW502218571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3678e025d6f21121c0e3941bdb883cf70be6ba450dcf7714c803b7dc4ed46e. 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/SE6SA2459535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6780f7588a4b3828f96ad81e3ea83a0d3911fc8c1cc35e2c6ba3ea7c52727e. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/AEA3A2234934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3af6d9a653573cbd44c97f6c85b9775f02e46798b746cadab6a801d5d2a2c1. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/AEA3A2293836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cd37b418e6f9c8ca233ba9148176e9a1d1e12d891254bee628c2ea4b10cafe. 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/AEA3A2469169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5e4c41f5bedefe9986a0f5c72c49f28b708dbeb4e40f52547476d204e12f17. 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/QZNJZ2466020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7aa5ceb0dc8eb2360ecfa4c10dc50d6e728aca8e1d944299306c16aea09c044. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZNJZ2449802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa280e2463f4ee29ce06bc0a4eba7a2c431952a1dade8315b4a8636e2c6036084. 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/QZNJY2475314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75a661651c2eddd61dea29766bab687e140ac89be1d31b3dd1205ecf7c290dd. 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/QZNJZ2405587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324aabbf4f6e3b58dbc5be918b60090191a08680f70f568e7cd55af77ca169c3. 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/QZNJZ2405261.