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 0x40cf8dc76bbfb903c29c7ac93120ae19d42b8a06ee4a3a43981c156c2ecce3d9. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09336adc-e7f8-4b81-aeff-82612047fe82.json and https://artists.proofprofile.net/proofs/artist/09336adc-e7f8-4b81-aeff-82612047fe82.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 0x48b2ee7a4371674d93e71386ac67856316483fe41ef02180e6c64222431ee99f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBSMU6342310.
Jestes Fanka Mojej Duszy A Ja Fanem Twojej Dupy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb587e8506ebc2decaee81d41a50824ce382c88c302c4ec681978f8237c4949d2. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GBSMU6898824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de02ce8d7d4e37d1abd181d433082d5fa21453dc43dc2db43057797e3dc1145. 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/DGA072156464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2580b748e8ae6f8daf921cb81b100ae085d463226d1f686cbf3cc149ff5fc57c. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/DGA072183820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948d3af135d6145c382e865650da684a2e406030d89cb776ed03282eb5488b7b. 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/FRS182041888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f267c321502cf0414fb1a10695bb7fd41423321841ce7715ece5df372dd8ac3. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T14:10:55Z), 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/GBSMU8203761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b7d413f48d1686062218138965004d4342fcdacf6bfb3f1958cbe3b17ee5e2. 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/GBSMU8203780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f28519cd826f0fca8168df57dcf52fa0cb8dfb69ce6b97cfe2c2f016ded3f47. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FRX762093032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10be2aa368a8de495874667bf12768ba9e46376635219efb2c0214d339d514f. 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/DGA072168439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7cd2e9f46731da5a1543983e8545d5215439458790222d5ec291a51064105e. 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/DGA072183821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8102225b09740af3bf9538c029cad714404d0a6f79d3d720e80bfb16a8bfbf2. 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/DGA072156463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd443aabb1b9f300821f11cc3505f57836b24505d387febd412f7655ceb9c27f2. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/FRX202094759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e45abb520269936f67e47b7534612c40f46990591a1a079c394fee714374cb3. 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/FR26V2017606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbc6630fb4e6511e37c9160962274ffe107c41e2b628bb67632f118b8f77376. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DGA052083373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4dcd619bce57549b2939cae8efc4ebfda8e627f34ccddac3b9b8c63171a6ef. 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/DGA072153711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fe35c24973d7dc5e059da3d9d1b5c96187a23c4945234dad4161fa32b9bf40. 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/FR10S2107282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf60cf35f01440dca909a5444f943bd80778bb56a7528450f33e42d39a6dd63. 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/GBSMU8203824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300bdc233772c485afcc7eebe9475729f9915d42557ee9778564c9b89a7ce046. 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/DGA052054531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6ec1d5fa6493b1f1d461b57494915837ce5958c20030a95094604bac858e44. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DGA072183822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc60591a056098fa4aafdf88944f6e3abfd7c250836188f759e054e57eb9d44. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/PLB382200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56dc0a0bb32d6ec34cf0333d865be41e3e49729fff23c7e33100f9b9d38fc97. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PLB382200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e102ce940e9f00ba9fe3ba6527d1ba2152c53e92acbb1c3813b2eee95176a3a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/PLV402301721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1195d381db44997f54bec27042fcca8bebb2dcf6a1862f999cd1670ed50cc3. 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/DGA0L2377084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31dd487a80721c3f95aa5040686a04ecd39eb016a8392c27a5353669244c2b0. 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/DGA0P2377210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b11fdab64b3bf67ffead0650d7a7848f0e8fa427f9abd7c65d992f41b698f3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/PLI368973020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a13f5193b961fa28fc795c55c7849f1d1141034a66d7dbc01edeb8a5ca0be5. 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/PLI368362470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc774f1c303d6630c3c1773eb25365e1360afb3d598acc29bfeca3c371da0a1f0. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/PLI367309880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc753360b7388f8ec308aa88af742494a1d8c2127d29a3efe3bdf360fdadb017. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/PLI360185340.