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 0x667a6030e3722b7b8b009f33a06c53448116fc8d51951e64e76b84ed7b7e91cf. 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/77e409aa-e037-478e-9388-1be4e065449d.json and https://artists.proofprofile.net/proofs/artist/77e409aa-e037-478e-9388-1be4e065449d.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 0xb2d35285b0e5b52361633795c806183c5175d2bf975226839e5f999458382771. 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/BCN412300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcb67d69104436464439390e6368a63398f30514dce06f63d265e099251f6ac. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/BCN412200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4512e811f42c11c85c3ecff794ed5de95b80569aefcef9621edc6ec09ea0ea8. 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/BCN412200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77201dd966a645fc24250ebe2ae1a236d01d705d723c54e6ba428aa69e17fb3c. 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/BXTQF2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaef2677447b3926a62620f6827d017d75247534c91586082d6655ef5201b433. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXTQF2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed23f2acaecbe1dc064567b9a45309ebd4f3c64e34ec3a89dc0a59e238806f66. 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/BCN412100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb74d82ab8b1a195b81f89a061a299d8ab5c3f1d5542a46321755c3960551d7b. 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/BXTQF2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0962ce094bf2f42b0dec181e5fd48c19c62eea0f8a5457ab5e5d576b74546a31. 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/BCN412300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c024aa0978935ca426c27272d414a31f58f646f5304d54df4fceda1366e72ad. 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/BXTQF2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab01ad0360e9171a1568d5c0ee169c5d0c163352d87b0fe59de9cc3c48d9acf. 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/BXTQF2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8454fec30b3567ce84f3f93269da87272582d345225f2fa8d815c29ccebcc5. 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/BXTQF2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428827db206bdafd6e95aae4662ac9b3353473f1b987e3956bb2fca074f2516d. 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/BXTQF2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ebab11e9e181b086b5225fae07ca62389b72d4c7d85f2285d9ec4bfa5a56058. 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/BXTQF2300012.