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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66093771a8f23873f6a7d9b28b3cc31a3c42026b160d2456c8129d5adc71cdb. 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/6dd5171d-0843-4c08-b0ad-0342383da6fd.json and https://artists.proofprofile.net/proofs/artist/6dd5171d-0843-4c08-b0ad-0342383da6fd.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89ecad7627777dc464b86fe0f814a310d2a17eca3bfd8291da61b406c41bf9d. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GX5MX2386063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305ce43cb24982ba8dec97683d77ffb696ee641fb65f1faaa81aa7b9cfdeed18. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GX5MX2317041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8c0392f5aa7cc6792f63f8c5e491a779d4799690430b103992dcc0f67be4c9. 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/GX5MX2312599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165b54c1b67c92eb8fad6ae9f6d90fc4c7be5288bdeb697cc8fa1b2d2ed1f6b9. 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/GX5MX2368931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f768fdd30443cb95b07c79f39f3235f2591842025f93b9dfe84c03b51ec92c. 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/GX5MX2367759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a592fede7beeb44ccd3e8f2111ab9228b7db52a8176fdcc2459a7873d1cfb9. 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/GX5MX2343484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb269b224cbec8704aa7c0c25b8766cc503b232b64524ba69e67e5828af99a1c9. 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/GX5MX2337610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc90901ace2b77f66bcddeec4c03524736cb524665809016cf068298b2038447. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/GX5MX2369684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4cbffe39ea0e49f995a0176a21ee47420f69f0be60129af400b8f9945081c5. 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/GX5MX2382078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0623132897205ea863c5ec71d480708e7926119431530f3bbf5ce1e1b906e9. 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/GX5MX2335405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c553c2847543b32cc095b9730f43246b3624f64b5e43a63ced58e79b232bff6. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GX5MX2361064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f671a8c6e3f9a3fb5fea1ba1225947ef9374600aeb7d8895b65a9b587eeded. 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/GX5MX2391847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404355f7f640598a2f212556e7d2657a8711a2c75acf1c29e4c5c3d176bb054d. 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/GX5MX2393047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6fd9449a2b7d7d5cbc4f37f5cc1736dfdf28ee923526ebcba0062e14736df5. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/GX5MX2367696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a0d14413a3b2ad360571532953d361f726337317d796facc2617cf72c07c09. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GX5MX2399914.