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 0xdc01a396d9e52ff27ba15aee7cd8809b56d14522b31f51d0d4eb088c09b984f8. 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/059c4bf8-bfbc-4f60-ba86-a08d07f10bd3.json and https://artists.proofprofile.net/proofs/artist/059c4bf8-bfbc-4f60-ba86-a08d07f10bd3.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 0x5a69937492de2a08e65259483a6a7ffcd77f57ec93b5ef63cca171157e1de441. 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/ZAO861800145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0cee0930c077da671b863da11e140370b2d24df4020b014eb2fe671fa8e90a. 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/ZAO861800146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33126084bb78d6969c3bf766f28c5258dfb5003da5b9285ccac76abaf233e7c. 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/ZAO861800147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7445ced9739ceba98d3c88451d49797dbced2352c7522189659effd6a7974777. 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/ZAO861800148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8181487f3840e65405c24bc297a74821d4cbe1d7c9c2e2b3e52ed70b102b81a5. 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/ZAO861800149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7780b07b131eedd1c88fe61c1b54d172945a8ae599b897e2366392b9c0749f8a. 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/ZAO861800150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35315c535583ab4c8d52a1593cb18c8d958cf3e4266a50d5af071db7ff1feb0d. 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/ZAO861800151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2be87f9450d76dc153b06d9f11033f5d5ee08289edc56477cff9d9110ce5f1. 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/ZAO861800152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e41d618eea52dcc3620bc7985cb38e8f66b4606a27fc96b75af844788089dd. 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/ZAO861800153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6cbc3d3f44db4661d302dd77ff5d0a87c931b36bfff034eb7f4da52e7e3b5d. 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/ZAO861800154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefeba1ab760d8a2cf3eb4a05cfe1b118bbc286d11d03531ec4edba2d52ba4d2. 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/ZAO861800155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362cc5f062d1bf418d9643a76e0198d5b3612000df0e7d217b83f7693df2a8eb. 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/ZAO861800156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40a866cec6fa50917a98c539b50a137aa41340172a30bbbcb55a8e169b4b1d8. 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/QZES72468506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f19f9aa40f760d424786b9a5fca2da0a24e39148a6f2a263f9b14a907acff29. 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/QZNWY2398076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d17e3fa86964323bd9eb2bdf9dbb0892ab5e31a4d4fb6e90bd08adbf5d38a5f. 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/QZK6H2338510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ff07ac9154c577b50509f041af5318791ea17b99e8ea82d1c1b40070f1c482. 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/QZPLS2288399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183000b682725be7d4314e39a45de41c3e99dcd09159e77c71222db4c99caf61. 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/QZFZ22258884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1315b7ffa6e47f8aef69663920cd57ddd44bcde9da606c3c7e5a403e9eafe066. 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/ZAQR42104525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f3db5567d5c6a64caf23e51d96f2fafa80b0aa1a3c186a53107eeb418b0dcd. 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/TCAFD2013422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f048a0e483ae5223a554aa6b585618f29dda6057e16ea8970251d41d3e1b9b8. 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/TCAEQ2025241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0db794db751b8d89e37dd0a5b8bda286846624fdddb7bf7a5ecaf5123d6cde. 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/ZA6OQ1700001.