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 0xc6aaf4d112d0144dbbc6e0b3b6d927fd034b2df5576c20f46d07f6af6a280212. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33e94fb0-7064-4fc4-938a-93d57e11152b.json and https://artists.proofprofile.net/proofs/artist/33e94fb0-7064-4fc4-938a-93d57e11152b.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 0xacd284ed69f106339b749a44919d78fbb14883b627a59e6f5b212c07ab9bd6de. 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/GBMA22425969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51997012906fbeefa850eca9a717cfc9ca923034cd780555bfac7aeea165366a. 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/GBLPF2513153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99ec75986e3174ec9d6ceeb6c00ac2132150649ff8cfad224502148031a10f2. 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/GBLPF2513154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf36524e80adcd847e4a9b0395d78ff58f34b529e5b5324f0608406d433e9864. 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/GBLPF2512768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2519ddf711c10eefbbe4427344733aff099aba9233163d671dddda285f1ae5b7. 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/GBLPF2511931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040daf85c65d1d5ad9dbf9e1b1a45ee5af8fefbbdc04f57e4ed8a7de7efce632. 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/GBLPF2509503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca119bdd6cf44a2603d3c37a14562a8ff1ceb4ba4b834a7c76148a6b6788b4b2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLPF2509280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cc0bab2aefc5905880242d1842fc153808789fbb5b354653d81cdbd62a2363. 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/GBLPF2509281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fa7d79ee43991b764c53f1ded124b6f154f1f609c08d2ab61ed1d22f92f640. 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/GBLPF2509282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c949d8fa221c7004aca1b612f25ce0e6a70144c708f071cdbe37334b620d40b. 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/GBLPF2509283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70da1ebd39d4a7a5a60dd39ad439b2e28c753beb1b6542f733b0e15794af035. 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/GBLPF2507933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494015551fa1917bbd74cd794e0a1ea4c6c8b830ef857bae2a82c8e32aacfdf2. 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/GBLPF2507934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0b3692181e93117c035dc57c1bca139c0868d9caa652cf70bc456a1b788d75. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBLPF2507932.
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 0x7d8e13b590ece66f1e4759a4677edf4288c18adef83ff213500270583193ec27. 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/NGA5T2414247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4d49d5f8f8e605b99130d6730f4a6c19065d044cd8d14be5142b184dc394b2. 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/NGA5T2414245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfc021173b0bab97862104bb142ba124fccf00479a90d95a19e3c10cdd4017b. 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/NGA5T2414243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8d40208d318ad78d1b7b2064c3773d207b79e56113636097d19a31ef32f1c2. 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/NGA5T2414248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2b96107fc977def6af5ae0b1373d8544ad83707757cf1c653d71662e109b00. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NGA5T2414250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86c2566f1250fbface2ba643a29f77e698dee7b174017a577f47e0d7b55cdb7. 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/NGA5T2414251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacc0a9ec1a683c7e695966fe70fdae7dc10b425488573561e75bd340a4ca498. 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/NGA5T2414244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670ea315ff6e35a13ab4eab5730c868faaa1b1b1d9e7a9e6be48b7a6706e0a6c. 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/NGA5T2414235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1071739ffdbf090c1c8ad88b3cd7ea1ed74e702eb3757d514fe477d41d7a5c23. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NGA5T2414242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d013beb2c8be7affe0ba333ef4cf4bcc6530b0bfa17c366cb6f706fcd2775e0. 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/NGA5T2414239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43eba9188af872c2ce12fec5727131fdba7ca4238bc9d7e5b0eee4296b80eb7c. 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/NGA5T2414252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fcd5c8c4f69c68114e8d1511aac0217d442c74c4bdd866306820dabd932c44. 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/NGA5T2414233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5828285b2117e4b0c880cfa8ea136abfaaf395f30b091be30255deeff63ba701. 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/NGA5T2414234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0263b311803f604c60ff6910fdf01ab7d747056c805164fae7e6b7c1bd8f97dd. 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/QM4TW1835263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79145222f7b42a3d6129e90ad28d7273017bd296cfa5866ed8392386d73ebef1. 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/GXD7G2286758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00a01f6f663dee1aaa7f5babab6d1e48e212707758edad5e33415241e638600. 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/GX53U2381772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a4609b14319cd457bf1b8810454e8030e01691095b756b02f82ec629e0a69f. 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/QM6P41860113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9ec465d2b0b1dc93f336848dbf8cdce063ce6ce7361fb750bf4a0262fb53ac. 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/GBLLT1617453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515bcb21bcda7bb0aecacaf24fc90aed6838bbf4726b2dbffcaeb1789cc60a1b. 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/UKXN22326409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ccdf269b554e88108e06091086f985ada2dac53ebea21c9285b56c6c9d960b. 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/QZMEN2348208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf217af6806e6a33a6519c5583c705bf4b22aa8fbf033d86160160e11d743c997. 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/GBLFP2387807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5e0671ad11d834a2dd6f8fe074c996d85b7b7f55079212da453cd1141bae38. 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/QZMER2309464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38165a74adb65a502b665a41cf69e4acf12bbe9993d650fd5e79ee1d6c752ee8. 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/UKXN22302867.