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 0xf3b0c149f677cbaebb5d461482b2d1844f30ccff0dbc1d4ccd7f78ea07087fc4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/78fb8649-449f-4523-a6cb-18ec6cc8ecbe.json and https://artists.proofprofile.net/proofs/artist/78fb8649-449f-4523-a6cb-18ec6cc8ecbe.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 0xc236524a0f48d64ec475e701cc375755ce5e0e4ad3e6ee8560187aa57dd4dff6. 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/UK9MG2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9aa73a083d0c704d9ebe078692b3976c8e5f081c28c8a6f4c91306999a9154. 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/UK9MG2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e709630e5fc59865c308376c34c50bbfaaf5a799baf2ea048987f4b6d6550e2. 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/UK9MG2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ade9611cdd67c9dfd3573d7ae78a63a78dcd24adb5005e3064fc2db1e1a7a50. 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/UK9MG2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3ac66d73e18c2619539cae88d1bd832a6861c96e5c3966001e05086cdf06a1. 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/UK9MG2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa910863821c12e7d5610daa4afc3346e4ff9f05855021a89b130a4880e040d11. 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/UK9MG2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23711298478aa293be139a569bd60330b2e62e9a95a830f6b8c927ea4d612bf. 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/GB9MG1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc17cec468c388391b39fbaf9c76600cdd696a8e684da4bbc9f428bfd9ef4aba. 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/QZ4JJ1799593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2164f4823ccdad0f469537601b3b0c55886ae879e8c558dbb2ed966b686ff65. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZ4JJ1799595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4220806abbd950263e1495031f244fcd056f35e40882d28752ea62de94b0f7. 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/QZ4JJ1799596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f5d604af5a7c18771d4bcde773bb3321a92578f05a67901347bffb85ff9717. 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/QZ4JJ1799598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6615aaefdf8813e6860a90843d0052921f3930d3ea4053e13b52d869c03a6df. 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/QZES82112921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23066db6ebc73146807a56f14c0544ac2f2371c45dd64d424be7bd4290057168. 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/QZES82112898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a16bde66dc0edd251fffb8c10f9f72fd142271dfdec6c615497cfd4c80c298c. 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/QZES72158205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65429a4f2557bff36ec7dd170c1a8c2037a06e02d10620227bd95d551200154c. 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/QZNWQ2077187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e709630e5fc59865c308376c34c50bbfaaf5a799baf2ea048987f4b6d6550e2. 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/UK9MG2000005.