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 0x28d6a34149a86273a442760634945ceb4451909529551cd9fcba90f6ab00b853. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66087a21-6d94-410f-b2b4-c7ce2be1bd72.json and https://artists.proofprofile.net/proofs/artist/66087a21-6d94-410f-b2b4-c7ce2be1bd72.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 0x3e8ff48e1f732369dc7bea24fe0b3d177e615c5f8d0ac300ac77e664334a404a. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/NLSH72200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bb936d1c41b2653bc75e6b7781de7e3111fed41ba085227f56f6d07ae26a63. 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/NLSH72200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd98d5ed87cd64ce74737f58489e2c155ae19b2af9a83cd58ecd2a148e5a1a4. 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/NLSH72200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922b6706b87a870a71661562153a4fd4a2694c105f20eab88e6bf75d657952a7. 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/NLSH72200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5c6b13b01cfa4d1c3532dc86a5de348b95fed849d135c48009adb49eb4bd0c. 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/NLSH72200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9614fe9a990eca543211662e1c4ca5a4e308ab46fda000fc04010aa036c9932e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLSH72200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50588bd10ac2e8135d1d935d35a857565d842ee5a7c44e1d89bdde0198e34bb5. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/NLSH72200037.
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 0x6def121c77cbea999a179d0ca62f9324d5c368ec8c7462148cf60efa80966bd8. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NLSH72200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c03efd4f96a56efd4342b6393b011822e0d14592729c0e15b048fd6b16025f6. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/NLSH72200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45812528d12793344af76416e537836e76eff950fb9e6ebfb59232d5c837e12d. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/NLSH72200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68d97e720a26d5bee3d78a59c96b5c83543384898708af17a405fc297d32ba4. 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/NLSH72100140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d6cc30852adb881c4aaec83c02522da1951595392bf55d67e75000ff38cf76. 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/NLSH72100145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee11d95c469026eb4c3f921ae202138b1af15623ef6dbe5ce4814e65e4bc68b6. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/NLSH72100138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d76dac03ace2633a2f2e3eb6d4fd8b9baba088ab76e387b5284121a5d0d949. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NLSH72100139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7324c54f37d3e916b9c831beccda2fc4e17b37da1636533829540540ec234f9b. 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/NLSH72100141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6161ef6cb5e62e6f59bea436204c5e0ac3fe2390a4d98037dab0834ee063af21. 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/NLSH72100142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf504f7c1d9385b4c1b3f8eff9531e0bdd026e37f3c37622334a3c13ff409a763. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NLSH72100143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5ce4ffbbcbdfb9ddcdeddb89e375a27a619ff03cc0586d10462bdea7f0b40e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/NLSH72100144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca383d83fe097949a9e1cf787ad99893356b88d5e341ddb73c8d6ef04852c34. 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/NLSH72100086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9da99dbc4f18d6f5652116a67d3471cf1411d7acc391a88c447fe4de61ac15. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLSH72100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704884557e2f4f0fc8f0ba03dd646399a917ab9decc6a25de8e72e24ac17c7ae. 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/NLSH72100089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fca9798fd6d73bba63c9cb62a0daa3bf2f199f0c81bdc17a851b50811099951. 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/NLSH72100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e7c86f6e9b4b4464a9d38d5ce01df2873b9fdd75c5e5c43c2eb2aeaab0e4f9. 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/NLSH72100091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652501bc3eb02f9e66b2211999720cd96d0d5518bc27ba533122707a54ece9a1. 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/NLSH72100092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a97aa2708582ac806bd774986d9600dd08f2e6725d7415f2de4bc6745c9b0c. 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/NLSH72100096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87613edbebddb765e860a5492674659926d253dbbf14217e28e43d0d9402c4cf. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/NLSH72100087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab453c5b6752d85d7c922a33110b59a47a9ee50fe8f8a8a56baf513c69519b4d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NLSH72100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2557f1cc40177b7346bb84a9426a44f5fc606de42bf26e20533b671bf9f790. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NLSH72100094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dfa139c38495c737bc515016cb729da68df5c457bfb70869d43503825c761f. 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/NLSH72100095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe324ff7b0f61c091668d871d1f3d1a8554b02ed9dc835d48af49b25a395260b. 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/NLSH72100097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f35f06b60bbd4d234b153426f46adf2725005807c2d47af91f8ff3ef802234e. 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/NLSH72100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8d2abf5817ca92db839cf2565eeeccd15807784662bc7199cf6284f941e01f. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/NLSH72100099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351ba647a5292b9d44b3c5c74ca89352735094e129505dfc9886f7bd5efe3236. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLH212400169.