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 0xa108772a9bd1821032db24cf05cf8a36427367a6b99f59a2adb25656cd246004. 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/dc01d50f-0d6a-4d0e-bd97-c12de68fa821.json and https://artists.proofprofile.net/proofs/artist/dc01d50f-0d6a-4d0e-bd97-c12de68fa821.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 0x18c2ba6ede1bdfcac47ff74d6b97ed3ba1490855567fd2b13aab976a5addb39d. 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/NLUW22101333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c5c85b4f7936c4a35e92e91fbff36a1e60fb02a868e3c066d2fc62986a060c. 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/NLUW22101334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6920655b28897f2fa22311913af76b88a6699f24ae84bc587316e5b7ad82fc46. 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/NLUW22302075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078b462853f40b97be5d44f3400502001924a17758e46057ac326e35cae4dcfb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:07:53Z), 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/NLUW22201826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaceddf471c4b15c6ef85cc40fda8bc79f6bc968a502f44d63d702f1215e2fbf5. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NLUW22201830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577bbf35c351390ee9fd4a71fef05a06335b755883794f55b42745ed74265ed8. 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/NLUW22201726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d7aa50c1eb71dead5d1642ad4b66f2932a68a0e10ba7b9c35df4efa3d291a1. 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/NLUW22201727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30b43f30223b6f220cdddf77dd65fb03543dc7716ee1a46b14e8073132d7055. 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/NLUW22201545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9daf3e82cbf29f014315404705434b3f1f4e8fcdd57afc1643083fd95709be9c. 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/NLUW22101487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e73ece4cb15c7768dcd693d4af0a06327562f1c8514b4d7db4e2df1f7e2ef66. 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/NLUW22101488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cdf56d07c1389dad310db2910e7f01bacd93c14ae299de2615b2e72686ccc9. 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/NLUW22201865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb728d111e0cc9ef2f6643820c7927a807a23c4c051c9a7a8bdf94dec3ba34c56. 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/NLUW22101398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3979e69ccd1266a3e16a90aaf372b3238f09464b703f4c1d7465f9c2873273. 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/NLUW22101315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c46bd757c9db40edec9a7c7d739d2c55cdf6d3b463e2af5bac5028bf2d9adab. 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/NLUW22101316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cdba46456b2158b7378ab491097f87de754f2f88304d36d3a570173eba54fc. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/NLUW22101271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cdba46456b2158b7378ab491097f87de754f2f88304d36d3a570173eba54fc. 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/NLUW22101271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd833c61ff16e06d650977bd9e31b39554141ec014ec270f3183685b58a87204e. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/NLUW22101272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22e81e654ca7964315324ce3e58a4d0e576deb92f64eeaaf34cfce637aab8c4. 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/NLUW22001056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59cff07736d6e8531795864cba27c2003d69834a3b8367a14ea775df2402dc6. 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/NLUW22001058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa94b6faa10ee50eefc0f42d51c51a831101ea09f95548588a69ab6ef42ed62. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLUW22001060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22e81e654ca7964315324ce3e58a4d0e576deb92f64eeaaf34cfce637aab8c4. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T16:38:08Z), 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/NLUW22001056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bdb5b5d4a860ae8cff92b54f1eebae289f885bc2a82f0ebf75192e3ba4fbc9. 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/NLUW22402461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0129650a21fc033f482331ac12d6ba24c4bcc55effc9019e91ebaaaaa77d0243. 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/NLUW22402462.