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 0xb1e4b50f3a56c731e5b831d313e6cc69b0c058968194781330ceaa6a52d86932. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0d25a45-49c5-4b18-96fe-093259be1c52.json and https://artists.proofprofile.net/proofs/artist/f0d25a45-49c5-4b18-96fe-093259be1c52.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 0x0ec22cbbb0205ecf2feecbe368781ad719188c8c539c0c05dbf2094ce62561f1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NOTUB1101040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520481c013dbdc8b79af1913a8543763fe6c6f75e84b7ade65175947c222e9bf. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NOMEG1201010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a98122b306884f6ccc09c2ca52ff53045a990dc58873a4b4ec3650baf50443. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:09:03Z), 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/NOAAC1300125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3378e749e50cfcfc44c674dd68aa14291c17b041fb8f7610295d2d12205a953. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NOACC1503020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56f6a670d98b797f223c7ef22272d19c97ae7c65a25441bd7c18c5ec681117e. 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/NOACC1503030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c30493fb5c5ce3301acd74e0e8c5a0c49766b5848a23884ccfc7c9858d67d1. 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/NOACC1503050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1eeee60e0b83387bd117c2a9be310ee35feea7fdc83c1686a4d43cdb8b88862. 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/NOACC1503060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a99f501210c91d00dba392c95f10a633c119ae64ee0076b38e2e49c6705f6f. 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/NOACC1503070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8343ca26feccf0912a84f6b7cc56c58d8d4eab3d0b066ffe240710221cd74c9b. 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/NOACC1503080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4a8727fcd9c944d3fd023bc4a931f7292c7e1573e711048490356ef3e12e0a. 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/NOACC1503090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9916508951e96dc16c02a27cbddd3084da2c9c3022c043aa7e257a6610b3f7f5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NOMEG2401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24131768b565195752d9897ba644a6f2bc01e72b327a364cfa18c65be792253. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/NOMEG2404020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647f383a5c27379d720ca6396223cab84c967d2d7ea06942a1747c9d14c42d06. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NOMEG2404040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c8d1eba0765f40dadad6863c862b457115f211328cb939012d53918f9e1ca2. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:40:31Z), 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/NOMEG2404050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a6d4b51a48503297752849a29ec6922e52131aadf77b91e2d521e34b18b4e3. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/NOMEG2404060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71dd884d3befb4aa756d318353249ccb22b8f64f423ef59463614984c26b051. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NOCTN2121010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edc20407d80a95f9c9921406ce92fa630fdf8e96a88981df37a49b202c448cc. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:57:01Z), 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/NOMEG2402010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6052495d810b06e0f9563de3c617d4c8e6976a7b0717b19c942eb8d18c927345. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NOMEG2403010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fec2a53e6e186232c0d2fc7dc57e42646bfc89cc4c187bb2ae3937fd9aa6d3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NOMEG2404100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f96eab6c19c3c64b1cbbec084f0f600ead7af61b6dfb31ffd7e8c3203945eff. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/NOMEG2404110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf45bd1113b29bc79daf6d62e5d781e7f8902e5af9751357a51423403b9d43e. 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/NO2FI1104040.