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 0x75d740dfb4fbc1799182cc3acf77464a29b402d82a8db7c050cd5a35b8fe68ea. 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/13c5ad0a-e681-4c68-a838-b4863a9a219c.json and https://artists.proofprofile.net/proofs/artist/13c5ad0a-e681-4c68-a838-b4863a9a219c.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 0x0535fd9bd28fc3fc0b2bd89050b70de4c95191e4954622ac67ff795ada74658c. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:35:58Z), 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/FRX762159810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4b02667f407c6e66c4b73c8cbd4de6ef859eb280be833f4d36152dda660c9f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/LBA0H2004707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fdbbc8f05d236959f24399801ca01d792e42e3ee3e57ec372489b1f1d2c736. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/LBA0H2006144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255f3a3d6c03a30adfce46fa80b498a91fdd605248e0bf37697fa58e732cfd38. 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/LBA0H2006612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42630dfcf8a55b013870187b01a12b523fc27cd10fb01ca4273e8bb00a663cf. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:02:20Z), 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/LBA0H2008390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452ede93704bb168ae82e6c3883dc71f496b27500581fb9fe199ce0ad94f69e9. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:06:21Z), 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/LBA0H2009497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7f4a6eabedad85cd490a6abf63a75761c646079fa5a33a00f623d3240aeffc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/LBA0H2011331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01358753bdbe35691498d8ebc3fcd5f55cd8d8052f54fd6d10fe0557d15da5af. 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/LBA0H2011483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a5337928ca726392379f12ba515636606f1b8dffe3a13b802c779da1c10372. 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/FR96X2572462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7829a9caf79784ef459edd478488a26283e2d1c1899d42a78ca890d65eb6f2e2. 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/FRX202595815.