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 0xecd414c373d1cc7ef2eb852b85df022f5e0837958b47dde84d4de89852874809. 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/a86fcdfe-0e9e-4965-a03b-b2b61812b580.json and https://artists.proofprofile.net/proofs/artist/a86fcdfe-0e9e-4965-a03b-b2b61812b580.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 0x78f11022ed0c244ff96fc32be49b79858538950d9cf12dc00b0ef7899faf1350. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWR2489556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345bc46c5e82fb88ce59fb5a9d06364b2ef02c58f5bf5b0cff52796452a822b5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTBC2439743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68de8c6f89d4ef24bf174d60110cbe9e23244660084b685e17f88f0348faa6dc. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:26:11Z), 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/QZHNA2501579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56de60e829790a29f9d9c51f21dc6943b0d575d3655bc7ee50338a92437b256. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHNA2501580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f481b6e7ae48012a8348ea68c06edd7b571e9c40f1c79590afb465a315f295. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:11:53Z), 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/QZHNA2501581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487eed32b4b4bb7523a1fd6e95766d2891926de2965c003627b1e260c5d52935. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHNA2501582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1e28f8cad8fab70a8c106d180d96f6bfb7f0e8f7e10ddc7234b8f33b0e3049. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHNA2501583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c26b4918e5f1d9421413bb266f21f5e9fc4fa397c6dbca254a68b3e681602cd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHNA2501584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d3654b47210952b84fda350ea2f876267f34e92568b878cd5f8413c635581e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:19:37Z), 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/QZHNA2501585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1cb5151d4435ba2df5e077391100bf7e0f59d94ba3d864588a8b2cb6d2b7ac. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZZ7W2408079.