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 0x951cd374cad7a0a8cfa50f42b509c735c284423c7655cb1c2bd0ca6f678bc4e9. 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/1cdbd4b8-8bcb-4f19-be58-6b9637330f38.json and https://artists.proofprofile.net/proofs/artist/1cdbd4b8-8bcb-4f19-be58-6b9637330f38.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 0x95543f6f25a5519fc95d331d6c21ec0daf6064e319accc0f2a1492611b1fe945. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/DEQ121216375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2f752df2f28483a71863a4edacb4db40a1a8308abee7e6abcda97e105f645a. 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/DEQ121216377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9f5e369789c899334115609231d96cbe479468bcf5cff882f53f79649c4950. 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/DEQ121216378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71633049d8b39dd42b4cbcde25943c59fdd0c4ddcc5c40a41b1458ff1454c926. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/DEQ121424597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80bac83a3617b4b34e689266648297faaf447c7e83d928ba340acf9a6e16ee36. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:32:47Z), 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/DEQ121424598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f537ec769b6d83cd92e3c8f5c8a1e00d63100780fb63384e1763f09dab6258. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEQ121424600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392a93c9c5d9a1f4b442561892152c90514bfc927672751e24e8c32cd0290735. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/DEQ121424602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc050b860e796b8a3a0842afa329542063638bd426bd43cfd1bbe51fb8fc9617e. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/NLRD52010025.
Coin Game (feat. Nakamura Minami & なかむらみなみ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7492d3bb9dc5519cae7a09a0951e0b8d9343a07a25af2dd38312a9daf019362. 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/GBMCZ0601716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943aac206e03df27d51529609b8f90872070466e481f6dbe4a0431b4634e1699. 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/GBMCZ0601717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ba1f8fb79a814de804b9c5fe135a82f4597e3be722ee590eb5d96e3e23a82d. 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/GBMCZ0601720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db03786715a24d4aa32001d8f408eae07f28c87b303695a45a73818cd3154f8. 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/GBMCZ0601723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4927141f5952365f16e5f647ec5e123a820380747e6871b92fa5e15c4ed4f120. 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/GBMCZ0601724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcece206e6fe82530cc7505303fd97d7ddcc8386f6518b11d8a9ec45baf8205. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBMCZ0601713.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f08fedc9d49e44455db45a0076d9ea271909823e4739a7795f989cc795574c. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBMCZ0601714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea8e8a48db022b4c12b441b14ac7031cb2f57a306a05110a4a2b98b01a98a26. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/GBMCZ0601719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6b2d424469581857702f0065af2c011b410ddf4b8c5ff6e9f7d3c73516a4a0. 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/GBMCZ0601802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd01a1746da550435df76383f6418f7908eff00b446b96ac84196329690ef85a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBMCZ0601831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd22d632be468735cc45096fd4a486984fa2b34a16045341985b8403f85806c3. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBMCZ0601808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed489d72e9c159efb2b63f2f4f42a507c1d0ddade9f5321502d9ab9f1caeaed8. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBMCZ0601816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f216cfec2b8e39c7a0e116cebbb2012aef54a4f661cd4443f8374cb73bb2b23. 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/GBXXL0800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714227fc854f4fe5f46dc09e168c0900561034dd2e7f8f7844d0496353e3910e. 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/DEQ121424599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305956171defa01e31ab8388642ad0fddeb9ac260dd88aa05f747477961c3c86. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBEUE1002086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffa73d8902212c0fe7d3090c679e8ad57641934a050f2078553f0fa8822df90. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/UKDBM2000050.