thumb|right|250px|Round Samoan meeting house (fale tele) in Avao village. Avao is a village on the north central coast of Savai'i island in Samoa. The village is part of the electoral constituency (Fa
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 0xed4be3d20a10ba77a1f5badc3f33b27ded83d50e1b22536661b53a9f02b03150. 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/53b46d28-4095-4db1-b023-cb0483e48925.json and https://artists.proofprofile.net/proofs/artist/53b46d28-4095-4db1-b023-cb0483e48925.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 0x25d7e5064af4d19d3a8e5721113a9d33ce3d08f70fc8a975143b0f105b57644e. 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/NLQ8D2300565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe18f78ce624b4d0aae56763a13498ce0039183828e36a4263a6b9885f2f69baa. 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/NLQ8D2300610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05595e1752b6da118832a1c49a6ca5f83768341f2c1b2011ce434a53c08529dd. 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/BEIW12300553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5eefecc06f1bd5a924e2fd42bc1821d3b96c84876d16fa331058b1fe6b7f744. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLQ8D2300359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de8d549162651bafc1b64e4193b3a5876bdcb743bb2f4b72c37eefe91bccc29. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLQ8D2300317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a37b5f8528570a593997329e46c5cbae4ccc59d0a597b3100003087c3ad3d68. 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/GBKQU2313828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefdd04b355ca4ff0e6e645bde85fd7dd0f99c7d54f7da9274bedacffdcf0a16. 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/NLQ8D2300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd2a5a0ee380bb9bd2e0bea384c8705ba485df191cd97ca815b97d4b668d916. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLQ8D2201451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40a897acee2f4c1ac4c0529bc82c0c9f2d6bb36d9e928b92f3dff7102d69949. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLQ8D2201392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd84a991b2c440584599732d0974d165a564032c8fdd7f748e2f61386301a00. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NLQ8D2201240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40134eb0059be60ccfa99ff3ccdaaea4077fbe7e66ae539c75000c35e35d7da5. 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/NLQ8D2201324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8956298c97d974fdccf561c15dc4329dbd12db08b508833dd2e445ca1caae1e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USLZJ2283597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd395378026b4374e5b7fd63455b17d794605cf672302959c4eeecd12e861d879. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLQ8D2200841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55b4dae2831184e86a3ce39daae8c8e2dd32c12ef4bc40bc485b37126200b0a. 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/GBKQU2237759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe128dffec29bbc174dbfa49c194396874191188ed2bc490b40b6babd3822a258. 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/NLQ8D2200510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab36ba4952f089716cb995c973906fa1a5a83970b5a50ebb2350d55c7c57d466. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKQU2204041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ab15813f2922805000f40a44fd8a2400d0f0ac5ee9c2a1c043ac042be3c151. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLQ8D2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522537f22a9d44bcfe41d378588f59b19cf596ff4af33392a5ab935457dac541. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBLV62127528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1059acd0ccad1e22fb74ecbcf5efe5b49b86ce1bcbb27198b0d64028411bafc. 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/NL4VT2100111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cd524d052ed484ffdb09108562aac5dc4503ca3445d42ba02988c0cc0c9fe8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKQU2196152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01863d9ba5f3d384ddd9faf247324b3c24106c0efd37cd60b2eefba0de7f4ed. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLQ8D2101297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5307f9de63845c893febe9093de67a9c76ef0bc6090c7ed761cb3cb9062adbc4. 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/GBKQU2180374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791e60d76708e5438dc81938251cc356f405ff30b6dc58c718fa35d991e6d5f8. 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/GBKQU2163816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c20470a4b2448f995d0a9d4e8f2c292e7bebb193249d1166ff3d08f6550bb9. 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/UKRVV1900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46443e8834bb4bba0204e33d98f7a2f65343ca7dee0d958698a730d43784f7a7. 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/GBKQU2043676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a1847ecd518ce3f18d498b95f8a50e996bccd9c591d6ff01e5c358f58cafa5. 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/GBKQU2030816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6cbf389d13209b4a26f95f0d27a1507c7a367762687f713d7253cd23d40630. 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/GBKQU2020135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040a2d354432974646545bc598e75ba2c8aec1cb89e3aeaf217f3aaacf7a4b6e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKQU2020137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5d43d0fbb80102bf7845534ac050153638a87f74bb88883aebfbe19aa2e8c9. 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/GBKQU2010596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5f7cb915775d57770f60b2e9eaea2b0b2992f434efda4d8a265ea813a1a347. 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/NLQ8D2400388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f07d33a474240ca7235ff25a05416fd9b10f8ad88215e2153eaac385d342078. 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/NLF712404903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5442c1a60b73d6bd4be7c6d8251c3fc0ab64171a692b676860dc9d03d4de2e9d. 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/GBKQU2449612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302cf9f5ab3bc497164b8145a6238bb77923dc89252513864cc9544a7c10dfe6. 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/NLQ8D2400244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40d0f5e0b831f92dbb742cf437b146ec338bbe5828db5e901a3266e59488824. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKQU2429319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3389653302d11f1919dd156ee58347556632db1d9a516ff1697993dfdc8b3356. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLQ8D2400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0396a6b1cb1f395fff87ecbb3e4d1d1bdc9438dbf66d59e14807a2009fb46da0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLQ8D2400072.