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 0xeb08d5d9af6f7d86e1f840c5c912d7c72f7d6fe660e4b35f4413629552a2186a. 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/f594df69-2a37-40e9-b2a6-50bd43adbbcf.json and https://artists.proofprofile.net/proofs/artist/f594df69-2a37-40e9-b2a6-50bd43adbbcf.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 0xd28ca732ca7032ff42ddf6e7a6e19407114c6c9ccd498dc146ca5e0490dbe7d9. 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/NLRD52018925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258fbf42fdb1d88dbb8a3e7bc588c354fbf97f9abfa748946833991609afb2eb. 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/USCGH2118737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2add8a0fa02e2a11557ad905cebae2723a350e39f3cac99aa386c936b7f2d67b. 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/TCAIM2438821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f9114ea8214d9dbecdc223b2e316473257d5fcfb04169f85265576f71007f4. 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/QZMEM2456107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4408a12f63d3bda457d256e50480f6992abc53f4ce17053c2eb9b78c73f1aeb. 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/USL4Q2382433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075baa2825347b96fe5708e254025ec46079bb3808b8aa49eb2e2034559a29aa. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/TCAHJ2370295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4c737f2e53eab3b68a3bafa15cce684a83638a179ce35d7741d2b36f596636. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZK6P2206315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff5beab2275302db92e013782e6c2105f42ef9721e7d40ca956f275308ce38c. 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/TCAGD2286633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c05e4eff1d945e5f80d3cb200f0334b1aac3c60645d107f33b61795cdb1e266. 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/USCGJ2270774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8132342ce977ce4a2f627cad540e0115f39b59e9fd41482498dc37a04755f7f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T13:51:43Z), 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/USCGJ2231783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab46c42a5673d7b5fe9ca4438abeba5645befafe0ee469bb0fc585c125e9a44. 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/USCGH2240395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1affb4076fe03884c0ac7fc88aaf5c3dc30b090b0df0518dad38f2765146f766. 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/QZN882149110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8634e582573d7a2de913aa735c28ad979530b4134882c4c4362029a9695d2eb8. 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/TCAFR2167771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79b171ed091862c494f53e5b4cdddf76c67ef5838259f9f69fa726e83666290. 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/USL4R2095040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2634e96639ba394f995cef8225328d765329f9ef121012182251004fd07876f. 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/QZNWT2019147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2056473df0c17e4145bbe32853d13211ee0093ae44ae26ddb71412b67c366500. 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/USHM92081621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6e3f77c01168365774dad5d117a55119898e383532dab008ea0760f94328cc. 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/QZHNA2037885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3eacfe31235b703a48b02a7b8a29daa3fa236e14f682162067b3d72b65280d. 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/QZES52066296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b2b89beba6604e6ae9177754d7e950d045667b47fc14709f219ec4371a2efd. 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/QZFZ42079786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3234426287f60b5cb9603b4d2099128d555cc5362eac26f5169168cc7f65cd9b. 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/QZFYY2000776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0811868a705f429b97cef0f843f041ea72997808b1764ad17745171360936297. 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/QZK6P1921849.