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 0xefb5a4a5ef6d8a0b3b4d1cec052b5b86a47b13487167991f7503268975dc5811. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ddd4fa0a-fe34-42cd-927d-7b4647eb1db2.json and https://artists.proofprofile.net/proofs/artist/ddd4fa0a-fe34-42cd-927d-7b4647eb1db2.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 0x5efa1fad522c3fe28bcec6301a462a5b68b0f0c10806f5cc1e380811c5e45e31. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:32:25Z), 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/QZTV32320965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d244ef9fff900f2ee7def87970b6fc8d2b4dc9c4b8a34a0ff64bf84cc01b76. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:45:02Z), 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/USLZJ2440415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e201d3d22e7c0e9ecf54b2b4f8465af6f41c7a371f57e44060d190c926f1ab2. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:41:21Z), 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/QZW9K2413203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e201d3d22e7c0e9ecf54b2b4f8465af6f41c7a371f57e44060d190c926f1ab2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZW9K2413203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d77c6fa4c7ca46db2e536a7c203383692563f6fd025eb0b3806b0dd8db007df. 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/QZZEB2320861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9df868ec99696971036fbaf93a8dacdf8a3060e4d1302eba7f87111f97ed181. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QM7282504893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efa1fad522c3fe28bcec6301a462a5b68b0f0c10806f5cc1e380811c5e45e31. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZTV32320965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc416535739f573dd54bf6ac71dd51a0b781451eaf9b6370a4ca028fe4df1c253. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/US7VG2526122.