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 0xd9abfb608cdb5cbbdaab3d66c83afd37911638e883d34201d93c5c7d8215cdbb. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0af76db-8e9f-4bca-acd4-8575dda978d9.json and https://artists.proofprofile.net/proofs/artist/d0af76db-8e9f-4bca-acd4-8575dda978d9.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 0x962f65b4e9ac34c6626598f59d392665b1cab51d9ed51cc4b89c3bd00851e217. 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/NOLOK2301021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71fbb18ec17176040b86bc5436125aa82fa39af87d14c250d21320f746bbda6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:44:39Z), 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/NOLOK2401011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1645bae7e0eabc8128c6cfc84d0cd11665e71ca414b974997f8a7843255e80a. 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/NOLOK2405011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f85055945cb790ee6583e11bd997603b390b0e0a965f5ff8424169b97647ae. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/NOLOK2501011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb616455da3c4d24f09d738de203deb411e711eee6cb70367d8427aeae59238ff. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NOLOK2406011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa257e5c3587d7ef56e40079dc2e896a5ae2624ad73da2893c830548411e14b4f. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/NOLOK2403011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85e0b9398b809ec12f33b059365acb8886f140ece05f11165eb47295e43d862. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/NOLOK2501051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece0a191838fe08f28e6dc039eb7cd3dd9dc0f61ede9636c3a6af5200b5d06be. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:58:25Z), 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/NOLOK2404011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1645bae7e0eabc8128c6cfc84d0cd11665e71ca414b974997f8a7843255e80a. 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/NOLOK2405011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8ee75b8f42c9acf4743b74736469d783e5b8004134fb8f42cd5d3d16ea8dd1. 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/NOLOK2501081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71fbb18ec17176040b86bc5436125aa82fa39af87d14c250d21320f746bbda6. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/NOLOK2401011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f8153e4d909ecbf8af14d02a8a840fd8e5326a28cf57c61e5cd19454c55854. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NOLOK2501101.