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 0x996788ac5a957bdbd719f93eaf7957cd25bee2ee340e5da73b5fe4215823ff89. 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/fc943fde-b796-4199-8b48-e869f3c1535a.json and https://artists.proofprofile.net/proofs/artist/fc943fde-b796-4199-8b48-e869f3c1535a.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 0x5ab9403d50f11c4999577d136c1a673fa427308ba7a2e361d067a00bbe041ea5. 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/FR59R2481002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c2b8c9781a4259bb601bfd0898d846f744dc00aab0fe5dfc7b5963f928071b. 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/FR10S2399063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f29b4451697bc3b01a29b3b115f5bf4872ce1a018e882566d02eb828ca59da. 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/GX3Q92126402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4bed275bfd8b33ee0228c988919e0c2edf006ff9303c815ba71fb45af47263d. 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/GX3Q92010529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8455c5439ca801263413ecb97a139e227ef7b1baa0ce25b65151dda601205b. 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/GX3Q92010563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b55101d9682d2ba0b449cbae474b16d4e8320d5fdd6730089eadfa1a9a270e. 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/UKXN22085613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08241e0b4deda53aafb2b69f86b8c3b8d92bec2e9c467e3ebf1f6805281a2357. 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/GBMA22098521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5ca7087bd1845dcbe955a67225a7311baca39d63cef56416b3805b26ff7fee. 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/GBMA22038645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad41797869589ad8a1caf0a156854604f48ff69f96a1e2f4a6f1bcb58275369. 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/GBMA22026364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98a5049fc32102d22f79e0f57ea132f83ce019fcd1a873f2021f5ed0dc8815a. 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/GBLFP1951798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb7799aa209e9324eb32a533f15d346857fa2ba1a046a7bd3872165f3d6f64f. 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/GBLFP1927916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba14c34d13a535ccf3388c4f3734577910e3f298cea7e19a27ef6b446e482cc. 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/QZFYZ2049280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d684ebad5e9e0f940f182467130b68a0742aae9363bc975af29d54c1de997d. 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/QZK6Q1968911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd58685feaa2114cfa6616648550178a5f152d2fc8114186eb099ec624161f87. 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/QZFYZ2049281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cd646991d083eaab7d45032eaba2efd9ef2ae6f44edc972c93084c4864ee1a. 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/QZFYZ2049282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c09458f3c28cbcf459bcecc38962386ad58d9f22db215f4baf64c02eb049c2. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZFYZ2049283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0122a753a646e36c34e2f009021b1ce42cfa4b7c3a34fefd55f0f930dd4037ff. 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/QZFZ31950692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa410e153b51f8ccbe81798a59334f4ffdfc96cec815ab79b3809c85374d8ad. 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/QZHN91917839.