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 0xb03b18f2295d314f35161dee3f370752a827ae32e066943c9308d03589e9e2d1. 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/45ada572-739b-4a1c-93c9-8749a9dfc1b8.json and https://artists.proofprofile.net/proofs/artist/45ada572-739b-4a1c-93c9-8749a9dfc1b8.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 0x0e661d131a95331a338cd5e667df2f32147a7cf229a2799c619d7e0ee5d528a8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ITZ0X2090221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6cb947a8f97653da9110d8466e7551d58ebf40506b2e4d2eda37f8d51e4a078. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ITZ0X2090178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1540bad175bfc1afed79321ca18277ca6420c9ee4040bf003733e9c842d4bbdf. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ITZ0X2090180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2e68ae34f69fdcd0e7efb3fc76a4ffe519a6be0db0d92ba529e4641eec67c3. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/ITZ0X2090183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd795f77269795af54bbe5258ef35ec34db798b11e1f49885df6e07f7738e2e27. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ITZ0X2290344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a5ae801658642d2a9ab47368dc88eeab0ee35651a5eda6e66df81780680887. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/ITZ0X2390195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1824db6543adc54473fafdc0e7b44ead6fe0ed497144ae5e3fb313fe0a2c1082. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:22:28Z), 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/ITZ0X2490003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae333a42182319c54af69f36249016db8dc1bb986148396e83a618197df5c74. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJA2457135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9dd0578bc73e1892bb7fcd17ff63a83978e2fbe8e24c2a38ed9984b682017ef. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAJI2555865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd197cf3a99e32daa7626a8c3f93665318de71b1edd738bd8a8464d4488a7ebfe. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:27:06Z), 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/TCAJO2502393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14becdf5bfe1415fc3552c7935b929aea169aa39ce437a2209faa4b46ad24f87. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/TCAJP2502574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a6e2ec36c35c2041660c29e2e6d972876a02a4ca314f3e5b8fa29dd3136a83. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/TCAJO2502636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d077c91566d640a28e2b798220298d3944d478535972896d00e2a0efb4ce36. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:08:46Z), 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/TCAJO2502979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9dd0578bc73e1892bb7fcd17ff63a83978e2fbe8e24c2a38ed9984b682017ef. 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/TCAJI2555865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae333a42182319c54af69f36249016db8dc1bb986148396e83a618197df5c74. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAJA2457135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f9d2f08d05dacd7f80f9dc64103c3791be43bc76fcded7ea1c06e42daaae75. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/TCAIG2478757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1644516f9e643df21d0c794911fe3bf6db097f4bceb282836a5981b3767f262. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAIQ2409135.