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 0xea7f1e2247b9e587181c9b74dc4465848038c1040f2a545c31e03ca3cd9eca27. 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/cb4ae2b6-570e-42e2-b513-2fb2bcc8b71f.json and https://artists.proofprofile.net/proofs/artist/cb4ae2b6-570e-42e2-b513-2fb2bcc8b71f.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 0x76cb214be1692cb7b1a15a1665e7321efd4bc0709bc9d33b6de001358745a00f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN62021025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc137dda68204fe35c3fa5b0b556d67ccd84bd78171dac7691e0d75ba0f684e6a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6G2010089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5abed537f26d127a416689b742c0ec8c5f4979440f8fc872963f34b7f76cef9. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:24:50Z), 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/QZK6G2010091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9ecdfa68873a7f7ccea49a488c5cf2e351d30f44f415796141d444cc4d5bb9. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZK6G2010092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1747bd8f1eeb07b7461352330dc6eca95909e0fd7236057f37be6281cc692a0a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:04:55Z), 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/QZK6G2010093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10ee8681b2915bd4eede3bfcd7a1ff28984f682dad9f7e104ca407547eb9627. 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/QZK6G2010102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0950c34e048c2d2037c19672557b2f2edff70671d1d3620ef5e83ef73890cdc2. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:54:19Z), 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/QZHN62119486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4caa3f15a993c3474bc9787451e3bd795f2a9b1769272288bd0ad5339be06057. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTB62234927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14287e59296f49c0b396b491c7be7739e71ff67bbb46ad0f76940fb47099364e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6K2415976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e2484ba6fe80493ec7e6aca28bb723e67dda41a66558372bf9f50ea99dfe8f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA42556773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55ccd0f6fce8c17b38d3965e82c44b30ad4b214dd18860833d7dbf801e647e7. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZMEN2555489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0dd0d0e43e7d5ef8a2a7b0d800e84f743b4aa1a63693be813034d897ecfad6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMEN2555490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c110d5cfc2205689e2b6e8bf68913081375fc9916327754dc1ad3c462dfc527. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMEN2555491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6907daac6c60cb56f7a0ab2b97c4eca16dbfac673f4b168cd396b3ddca3bc2c9. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZMEN2555493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77516816856b3c5c6ad75b5b634160bcf8ce7204258a903fce6416e73cb898e8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZMEN2555494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6039cdc132d377be0acedae0413e707a48d168f03aaa7b936d05d92e93fe65f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZMEN2555495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6ad9d773370bf45973994d3cbb5cb69bcb999d80a19677ea9e6f0e6e49f724. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZMEN2555497.