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 0x6eb20ad59a164737d2c3bbd405a1c7373b72d5be2c8074eaf947ed119a1a5ade. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/505a5364-8e87-48e9-a7dc-859ffc7188e2.json and https://artists.proofprofile.net/proofs/artist/505a5364-8e87-48e9-a7dc-859ffc7188e2.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 0x404508c586505365c76feea19115a971bfad1ab86ed5ae0e25769f51332a8be6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWFW2412626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e15a192c084506c81b0f001a4435186ab148cb86c39493964127b2aedff254. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFW2412627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1d26d7f5e64d12103f6f06588e11fdc2f95a92d1ac90f5bb63d5ce7ed88e41. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFQ2444051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36f9f780787968b4408edf7d86586c9acc580186071bc67a54b99dcc8f37d86. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFQ2444052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9d5aa6cffbde76de444ba85ea359a2f3a6b5b1838fae111c98ea8acd4cf1c2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFM2428772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e41143a8c23d43873231a0a7d783c5c813cc09f475ac50f86e31da5651b7d3c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFM2428773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4774ef31a8b1d98cbe278a47f5cb0c3f262ce673568341345596f340100442. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZWFL2495842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bf382b7f53627e095437aabead02e264a6b25d990edf75dd06f11db9ab47f2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZWFL2495843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb942acaa47fe9015089bcc802afe53aa1f7543eb5c9fcf3f60c9a986ab621023. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZWFL2403867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740a9e47e270d42f5abe3924d6e8cbe502b3f6d2532553d3fd195f9130aa0201. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFL2403868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e8f302cf1ca13ad90137d9494de02827deb0969bf74a3d3f4d9053800a9048. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZWFL2403869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdff0459a95a934b754d1acfce94c987e15301c7effc6e7322f5e342ac8ba14a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFL2403870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4860d8efa624db52b04e0283912038e5c6484215c5bd2a5e359c051acc01a390. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZWFK2430037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8928ed29acd79a6d31a0688b5e651ef6a33c8ab0dd00d9d9ddf00221317763cf. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWFK2430038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6764e804c9c2fab5c5aa2032f68ae98ea9c6b034fc71ca516c7900010e37468. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWFK2430039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cad41a13d092e0f836d3548a9d8fce0c747dd26b5f9e43547a5a762ed5917e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFK2430040.