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 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 0x0fb40bd58f6e14539cf90c97e8e3fef931bc92c20c96485237526fd82518b95d. 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/8a7b3641-7fd9-44c5-a324-7c886609813b.json and https://artists.proofprofile.net/proofs/artist/8a7b3641-7fd9-44c5-a324-7c886609813b.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 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 0x5e5c5a148e429d6db1026b18cc82f14566b4b9533202dae862c92900bace2f44. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FRP1X0740340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341c1e466234af03333bfc168a03f6789f57da0abd3fbcf204552c38c40747bd. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/FRP1X0740350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee485bf16157aa3f014a3e1eae0120c458a931868b163d51174a3ee76a6bbe28. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRP1X0740360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05aa2ecfbd41e6ef581ee445152ee8b298c4a204aacf5afc5c3c0ccf6c8d6955. 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/FRP1X0740370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e9d6acc0aed828a70a9492b101e219af411169b9c62bbd6b5d04f62e86f3ab. 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/FRP1X0740380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2941d8e27b36d827230fcbb1323f533b8f1ebceea376cb22b5099bc91a8443a5. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/FRP1X0740390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3077d0112bb6e524497043274d8522582cbd3a54c9cd5cb843584dd167ac349. 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/FRP1X0740400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454d3c699e234b0046ab8e31af382b198f0d5525a4753a01cc034aa1965cf7ba. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FRP1X0740410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98cf772757a4f2a975b1025d426b7893fe49414cc4c61525c3c9ad3df5cdd72. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/FRP1X0740420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a878ed8fa38f7d479e2eb4ff6faeed9945d8f935ee3a58cd847b95a5f6fa5d. 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/FRP1X0740430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0459bd3e69d0aaf501e5229e095ebae954d1aa9cc64d6c4db58d1afb92b478. 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/FRP1X0740440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a4d2ad03921e3d2f115d8fe439de83e7593aa1a154bb0ab7ca176fbbdf99b3. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FRP1X0740450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e2d3bd4003c388cfc43a565294f4b018caa5b26096911d7610708cce4a4785. 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/FRP1X0740460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c891255fdc71993c66274108c4abb02ab08fbcdfcf8c533cb0e7293d3e80f1. 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/FRP1X0740470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a835b79cddfaf8312d2894a33ff4cdead23c9f59e63890b459a617186f8280. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRP1X0840610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceac69938c789c147d1333e53c47cb45fe4f2063c66386c7383d04e27642d356. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FRP1X0840620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cef6e507724e33468ee69d4980f43a571725a3fe3515f35f20c0d6d32afd9b2. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/FRP1X0840640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bc69d98483deef3901c06be83b520204a7c8e0ffeb25b0e32f25af806d6cb1. 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/FRP1X0840700.
Follow the White Rabbit (Kultur Spiegel Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2733f293ec0703d898b803fe200650a8c7915b1bc915fc96fc13070036b7bd95. 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/DEA891001200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7598aea430c514fb055e154b570122af3a4d29dbc5e04d7990bef4008ac4a8e7. 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/DEA891001201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bb3663a9c676fa42ab534a19b45568e0172c14def35ac2c513a89cf38cc3a9. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEA891001202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9639034ffcaf42134fe974d3ba96037a3e0e430b086f190b4c4da4677ab1aba9. 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/DEA891001203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad9dadd149bf18b5d57c25d5b7bc2d57ffc0a312bfbee7b8aebd30fc99fa9f2. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEA891001204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e484b5e88143375ee9b10f5db5bab2a7f93a9b8d332e4cb1b92ae1c88f747b7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEA891001205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f91fc302059c4294169b0be0d0739268a3b22114b2069932aa90a27e24f058d. 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/DEA891001206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dae9f20a988fbe2ef54375ad05616761293fed9170198b3ce7c044f68fcb437. 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/DEA891001207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcac07770b4fb6ff371a2d711b57f07ccc5f3aab838b6f8c4c14f1c45aa6b024. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEA891001208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f97ab7516d6d21f77b06ee5db6eaa7ff1fc4afdc134d65cb2a766ceee75a2fe. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEA891001209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d5dab52c41d1ef73dc9f45331a2ba15de96469480cbd1820a7e86087e92536. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/DEA891001210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2be4e46d2d504013b8012a2334676b76db282657a66fd17880fa5e66ed24284. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEA891001211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba231fa24c55b8363dbed5a7213876bc0fd87e15caf966dcaef57c853e38da2. 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/DEA891001212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce557eaad8f8e6cab20b261fec25669cccbe7bde19cc7e8d6aad7d32c8853ec6. 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/DEA891001213.
Jazz Piano French Touch - Terrasson, Herman, Enhco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75d449dfb49c8f92da078a43f5e2043c4b6b0399eecea41a4c2306a0cce79a3. 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/FRUM71802166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe261ca16c8b896bffa0d9e25f190d16bf31658a3318d04321771f5ffb7a612c. 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/FRUM71802163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9639034ffcaf42134fe974d3ba96037a3e0e430b086f190b4c4da4677ab1aba9. 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/DEA891001203.