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 0x4f5243e02664f9c291de9e5775430bb8b5677de72767a12f0826aa07c35da4ff. 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/2f6de0f9-f053-463a-9446-3c37b40beed5.json and https://artists.proofprofile.net/proofs/artist/2f6de0f9-f053-463a-9446-3c37b40beed5.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 0xf53ad0bbb13f14670f20be491ae2d5ffa9132381dc12111b5e8d588120321c76. 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/QZFYX2007930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e813b45c38f48a558299a08302609c3760c8f843db418c4b32353ac18bc31d. 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/QZFYX2010766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29afb270e6a5496304757a87c033832dca63b97bf712794e1c94cb6bbdc66e67. 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/QZFZ72066968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc14a6de04600e2adb2e654e476c37f386b0f0345c6587e4825fa46dd85cf5e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFZ72066969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ec7caacb8e69d184e828f2315a46dd47b2dcd19ba6ffd4d53caac4cbb214c1. 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/QZFZ72066970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07cd5b8c0df6062a6b53008a107db0975c704d21148d5e430d5c93ce78b0d42. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:52:20Z), 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/QZFZ72066971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af88b8dd21b08a2e11cfecc375631ca0259546a966d66f250f39107263e4896. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZFZ72066973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c97cfb31e337a7e563a291919315b3c941f4a355eba9e9e0c7bc3153bd6ed2d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFZ72066975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b84f2d6ce708bab40f3e6a9784bb32a1bf2c2fb9e73ae10823ffe5941f1fdf. 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/QZDA62084244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdba8224b7046017f9ee8ae3339f15b87076e2d6fbd013fbd4adf0549986acc6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:41:50Z), 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/QZNWU2005720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d852dc0ef11e1c40cd2fe32543fdfc2b0e9f9699076961c7737ff4772afc833. 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/QZNWY2039835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57989ef092093625b652ed014b2329483bd77ed240d9d294ddd1db0a5b97abfb. 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/QZNWY2039839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2c3025befcf9e4f4c308d0fadca6f70f3e448d7b35f56d2ba60c803bb8f8c0. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:05:57Z), 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/QZK6F2159616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b0276d64bc44d449d0c4d8bbc8e5ee7cb109fe32fed82c93c11d900b5b4514. 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/PLC062260124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907ffbb900a8191442817a41512f0f8c4367f4103d753ccfed430b04f046d89e. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/PLC062260125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6042d6ea6893ec592d42ceb90ec518f0e6bedf32d585827d6c41b1d7ae4846dd. 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/PLC062260126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9282f0bc5413f4fe8659231c0fda1e31774c5fa8fd285d7d799ef1c5ce4327fb. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/PLC062260127.