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 0x23e16c38c33836cf155b9dbba5318ca4954feb7850f303750c2c10b6d0cc1c18. 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/fb648ab1-d972-47c1-9f56-9d0fdd2a8cab.json and https://artists.proofprofile.net/proofs/artist/fb648ab1-d972-47c1-9f56-9d0fdd2a8cab.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 0xc206141e2f6025ed0c1ede66556c5d90e094cdb01d1a01884e75c683055230ef. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USHM80856140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a29345c157b13c5ada06afa84884ab85baed14bd56c7095254fce8e0ec740cb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USHM80856141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc91e18983c583d03404ca6c4cf861417b70112dd293a7469fed0883ff5bf5a. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USHM80856145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585a5d9565cfd6e608ab8bb6ae5537cd733c2e156bea493b6258f83d906e1dcb. 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/USHM80856147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a184d893fece685dbc9cc264da3649633dadbee8e2b4cd5d299bfbac7917139. 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/FR6V80772207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1d7e2ef549ecd5c5ed53ffcc3730cdfa220ed6302e719857ba68b5a386ad44. 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/FR6V80772212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8f7c7ee857a03e74485611a00fc041c924d2c7ebcb8bf0cc4b3cb1fddc0985. 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/FR6V80776563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3684d79182ef05231022eb03ac5a907c83f3333a1f5f8346a700badcb8ef639f. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/FR6V81315434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b5b6241d365cead5e71c21a3c03609692466573de1847c8b74e6af838864f5. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/FR6V81315438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba974eb77c17796ecf2c25cca914151ceb640c7b71ce2896a6e631888e2ba5a. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/FR6V82481130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb600a27db80f09fa9dbbd786186ee8a519caed1fa144cc5570439f8bf27e3099. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FR82S1700080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46989d275e76003210988bd7c761614b512f07e4ddb737123e7f5b37efdcf7e9. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FR82S1900123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c2b0f9e54e31a8d74f9f150647036c0bf864ef776e527637e1aba2e007581e. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/FR82S2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234a068decf5f8c27782c7f9670ddb134fe417cd2267f6bb598c33d179c1e474. 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/FR82S2200132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976c7c87f3e7afce377be38abaca9a6748aa600aad8fd269b90f678a8164ee6b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR82S2200284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2072bc5eee021e3f49a6fde03ab2e0fa5796e4c917e284d981b21fadded20b4. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/FR82S2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788cf2cbc54e923f3417cb1e6530240809f1a5b9d46b6c3ad4a41641b4f08403. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FR82S2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fe49003aa435c4e75c4ba547f0e3296b5f5a346d67d974983bb67266e59278. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FR82S2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bec50832899182c0a6c935af0ce0f9a53cf74cd88761461dea9c8279c97b51. 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/FR82S2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f24af8f74295f5e28915366cb6902bae2a1928cef66efe2f61462853c2cca03. 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/FR82S2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c13c1802c3fb398ff5e41af48335b4f3095d650c2109c42b59600c1bca916a. 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/FR82S2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165f8f184ee930cf43e0b9e10f97d78dd4103942cbff44e2936b3d8548a7ede6. 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/FR82S2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb173c14cfd8606659509f05f33a44378deac6ca9bd12cca2db33f60142c3f98. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FR82S2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c2f2401166b5b74b66b726f3f47220d419f2255044e0e1d41d752a7de90fa7. 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/FR82S2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614a99fca42139948aea2537974db65ca0e69a449947df58a4cad458d6004aa6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR2X42501658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb173c14cfd8606659509f05f33a44378deac6ca9bd12cca2db33f60142c3f98. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FR82S2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4655d4225676a4de2abf3a005485c31d1f1aa346fbec5b178d7f7bfcf195b5f. 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/FR2X42416770.