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 0xe2e3d2a32b4ae117ec4ae1be63a747c7490f39c99d92338343fbccb530e0be78. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c858aa9-99b0-45f4-a113-e690f2dc7df4.json and https://artists.proofprofile.net/proofs/artist/4c858aa9-99b0-45f4-a113-e690f2dc7df4.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 0x7c1dd362e059fd351ee28048d892f2214f6ebcfca8d43425c18e91acbc771cec. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBLFP2566178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ab0bd1eb24fd9703a115a3084b10b39e39d53a147acc9e52b0e6ee787e73e9. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GBLFP2566173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd215fee83aea7b218f805f91944f258ade7842a1dc5cd5869888cb2a6e8bd64. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:52:20Z), 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/GBLFP2566175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb305b670e997dbb51892fb908e47b152d82c748f13b5b2637feb5c08f1dade6b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBLFP2566180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff40f4aa1b99cfa802bdec1ad91772ca718bc64d90f7c16c8f6e789f92372b4. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/GBLFP2566177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115995985b9688a478f48d3c99dda278feb1377e83ad09ec36269940c62bb4c1. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/GBLFP2566186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895cf0d9b4efd5d27a93acfb3d1e4e03e77f63e737a7428dc00907b04b1a1a56. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBLFP2566182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dbcd12fb9a7baba74173df9ac7e2c73d3a977ab9718b7e1c0a3407094cab4d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:53:58Z), 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/GBLFP2566183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cb9cad5a2d695047d1833cc354ef9b7c0150c09f79717dcd682ca3589d836e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GXH2J2588776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e2ea37bf32891ff9fdef44359309ada38e6bdca182fb2f51fae9a4490486d0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXH2J2588792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a62299a49aa1c326a5e232bd4a459c7e392c426cd3dfe5169a5924739225de. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:04:15Z), 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/GXH2J2588817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6da5b066fdb6c217a5fa599c3322988f29e1a0bc94e2d91ee59f55f6e650d50. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:21:26Z), 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/GXHAF2550398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fd54dd6123839eec3bbd87aec0467eb18339a47389397391a82eb47d7f1d24. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GXHG92597857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6863112fc0f683c79f992ac3ab2b0431fc599096249934ad33a83eb0a49c8962. 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/GXHG92597465.