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 0x5551501f318e5e107a41cc3a04939e803729e966b5b75cc74d09b2c4e13503aa. 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/ab435052-22ab-41ae-a637-148d45d942c5.json and https://artists.proofprofile.net/proofs/artist/ab435052-22ab-41ae-a637-148d45d942c5.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 0xf2e1ef1d1928a236a571c714c526929476b98373dac49c79048ec02bdff5bee8. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GXD7V2299799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28231b114cc965d13072ccaf36687e0ef5eefb22a1246adf661754c4a280e2d. 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/BKOUP2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca2259d841b6d382fc55190e7a7e0bf56b2f2f4f05ea7fc44e7efa4a3d1f3b5. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZZ8B2442698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebf4e7c85e35447de67fbb8640f2c8ee31414843156bd2221b06e41a21029e7. 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/QZTPX2487886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f443e80536885f24b4bbbf78f5c4eb9d88d19f3669d29d12861132267d9b559. 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/BKNKT2402691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce152fdbff6dab9e6d0d0c959bc3e589a7e0c1fbc1e88cec82547e77e2e2fe9d. 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/BXKY92400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ead10f71e9ffcd71551b2e8edbc7f3301571c8a64e3ddf52b0ede3e28329087. 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/USLZJ2559087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e669b7ef9fc780605a8cd2544b6cad7ed3ea11678602a949274b3aa0923e6b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BXR5H2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19dbcd7c1e3e126c6a2fa5ffc1d33886b8c191cb0469cab082a36877d4f6f5e5. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BXRJ92400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c3882dfea9d9351fc24817ecaf37c556c66dd8c9624e20fe1929da163d5e2d. 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/BXRJ92400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7075b6b7753e9f707c0e7299a2c367cc1d2563fef21e8a4280c879ab3d1ed057. 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/GBWUL2590778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58268f48cde68ef131d1afae421282a9598a9b8a87180be3d4a0388db60c09c4. 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/GBWUL2590698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5672dcd724b2ced3f29c2e45a50db82e7664e569fc655560c409376f64ed3ccb. 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/QZGLS2513698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf50de5848bc82e3e02b23c4e9527ce89079edd10e5630902098afcaafd339bd. 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/GBRKQ2510489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f170cf092bcc6d3c975f5cb3619453b0e194f81c1b0592f9171e49bea58a55. 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/BX4IU2502637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1556f206461663ece1717e720afb7c9d3bf05c9f9b3c386de5b50324e39747. 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/GXBAV2531573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998bf96d7fcd41f8d7a63c8e5ec1c6f2c4732eb6df4e4b5f2ab22ed37ce16799. 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/BKOUP2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622ac02a4e382dd0043023e9dbd3154eeb9802b2db2a2b56fb1b92803e9e6371. 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/BXXUM2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c46ba9abfea9e0442d00445072b5ae0b393cc5149d8d991cd2214298c56119. 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/BKSV22400151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80cc8b145882e42e75f4c628e4e2b2e6881360b86646b4983115e058c0ea8a9c. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZW9K2447389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbf5c93fc438604f32b6628d00ba5b034d01ef89f61061fda9297792ae43fd8. 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/GXD7G2287320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b2439e0c5f6803a29a564735cb5d6e50fdde4c8ce60e5e61d65c212edc2aa1. 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/QZTPX2471758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cdf5253a0137099054c5ee834242fa1aaea680935c320a9eea1db3bcf2a380. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZWV32459102.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f5058cc872f87acf0e983ab0193c16e3563589f23ed17cebe3a7f51fcc9ebb. 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/QZNJZ2439297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7e46485cc804bd3d988b08c42f4ee19d829ef2f0d3c8e951b08298954a7796. 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/BKBBL2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285896af8d5ba5509ce2909b063f452c34820ee5831f5ccdfc53f5338cc1ee88. 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/BXVK62300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ad79175aaee8b407e58331c068c0aae4fee2d5286d1ad134d76ba8e89972b6. 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/GXD7G2358750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2897a9c214d4fdf2b07b8c02f9a8b46ec969f956373be9562ccc06e01ec0ef. 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/QM3DF2174069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4dec3381eaf7182da7a4161f61ac55e1dd76aa34209a0fc257028e126e7818. 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/QZNJY2102732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6827768d5856f4777262480d69d1e1fb5d52afffa71d09e6029f91833db0e180. 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/BX5EU2100130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf84f42ad537e6dfba61cff094ccd1fb081472f78dbe36fa34c2e80f3f8c8729. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZNJX2371091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd13c068a85fc1ebb29df4fd1b8f48697ad70a2fd15d0db405029c26cd81337. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/BXIV82336460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bba19612b711471150fa0ab264ae0d7067fea66bb1339a1577b12c64a3f60f9. 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/QZZEB2405227.