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 0xa771315433df7f17b27df23f509a73e05cbd9259cb0c65f387095a803bac2358. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81a15cac-a8b6-43ba-8f93-e7a4be3aa394.json and https://artists.proofprofile.net/proofs/artist/81a15cac-a8b6-43ba-8f93-e7a4be3aa394.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 0xaa35b7b8a9efbbc1d6d54727d9f43eead55ee735a9a44a6c70369b8b4afbf7bd. 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/CH6542010785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb382986d3e0299e106eb208e1b91177ff30138210e9f52fe51c82559de160921. 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/CH6542010783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a30cad372a896de5d2d0f40eb4d42462d3f9fabdd14c64ce42a5a9f03e359c2. 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/CH6542010769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916d590541e6826392c299f6b180512c8e47e2a46d9181ecfad52cb0c6671357. 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/CH6542010768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca0610e14bdd279e8c7f1da46fa9b970988d1e65afc20a63deb0241e9a7d19e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH6542010767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ce7336bcd0cf0290d51824d39c7935c3063636e6cff589005fc1aad300b667. 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/HUBK42300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae645945826f6bcc1ff051e553999119b735aae0d4438d94799ed70db201281. 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/BEN582000463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d6d46f77b5318a34efaae04dcd885c9931f4a1454ec1277f3f7209684bcb7a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BEN582000462.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680968353f75cf9cc37ed4dd4ad80d28a993657ddf10f8e9ab6af343ca5188ee. 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/QZ5FN1808227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e536d220ddcd4325173f778faee1a8c6aa85b9acf3d8853115b0db49dc2fa13. 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/QZ5FN1808233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada8425827829a749c82d210bce714703a334d313d3b253e056d68d978c3679b. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZ5FN1808229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321f2f0392862ba0aa5612327f1a0ac27cb063d4dca23d26f6512c9a6f8c521c. 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/GBKQU1761211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde87575fd1e7bd4a849bbe57537372210650bb89a1a41073d00c2de0cba4bebd. 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/GBLFP1513162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9393e4fe0911f23de246b9b873569ad7efdcb6c55ff6bad28f7e723f782a2c. 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/DEFB41900410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434034e82ceb0b97caf2e720648a43f2e513cf5a9aac373c4cd8f7783fa9060c. 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/DEFB41900413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1954533e384aa82276b40b52fba6cbb16ad36507c66b95c88c5c932245a474. 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/UKXM42000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c071b30319888bca8143a9244912528d31ca1f7ea55d70b5cfec884b2acdaf4. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/GBKQU1795560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd832b7c4fb654b95bf6852829d17bb7ae54037661a07e3436e03196e7af07146. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBKQU1795562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68f5809b074434288f90f42f26ef4791a7d3cdeb59da0f5091d634dfd6ed78d. 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/GBLV61818298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6e006be19fbba8f09ab564e0683e2b073867fb75b1bb1cecffb5de1467628f. 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/GBLV61818301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba178dead18dd9ea578d424f7047a4e79ec5ed6230760e6c5b4793fff4f4910. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBLV61818305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb097a03d67adc3efa3e4bcf596a408fa6251937acdb7d2a8dc58831e5670e831. 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/US83Z2120430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1ca59a26858e2bfd4d46ea1aa5d1d479e28342961056bd42b6352f3141051c. 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/NLCK41072783.