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 0x0cb22f9b6221f5c4d669509de7754db6f423a29efba5c990d02fda4cc04f008f. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4bdd4422-2f76-4507-8212-816a6466c70f.json and https://artists.proofprofile.net/proofs/artist/4bdd4422-2f76-4507-8212-816a6466c70f.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 0x0e2d8d59ab5961126ee1c0875646ad8cb3b48d96f2af7b7a06c9b3cab999cfe1. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ARF412000165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268e9ff66cc6f7089a7badb6a0b73eedae5370d86f75f093b144d7ffe82bae0a. 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/ARF410700000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268e9ff66cc6f7089a7badb6a0b73eedae5370d86f75f093b144d7ffe82bae0a. 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/ARF410700000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5d51da07862d83ddc48cd434bb074cd74928a29202aaf54ba1e60fd7cd792f. 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/ARF411200827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268e9ff66cc6f7089a7badb6a0b73eedae5370d86f75f093b144d7ffe82bae0a. 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/ARF410700000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5e8672c3f99d12d5217ef8bd6c45b6a4c9eeb799279703d2a82e34dbd49935. 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/ARF410700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268e9ff66cc6f7089a7badb6a0b73eedae5370d86f75f093b144d7ffe82bae0a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ARF410700000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a692987145a5d92186ee0d2ce137608d77591fa9e046c286b8fadf2ee7d63c. 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/ARF410500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c7dc4d21e8aea8d8ce9c1c9d910be615d84f1e1decaa0724c4a991dd4d7ad3. 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/ARF411200826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5d51da07862d83ddc48cd434bb074cd74928a29202aaf54ba1e60fd7cd792f. 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/ARF411200827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268e9ff66cc6f7089a7badb6a0b73eedae5370d86f75f093b144d7ffe82bae0a. 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/ARF410700000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5e8672c3f99d12d5217ef8bd6c45b6a4c9eeb799279703d2a82e34dbd49935. 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/ARF410700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a692987145a5d92186ee0d2ce137608d77591fa9e046c286b8fadf2ee7d63c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ARF410500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5d51da07862d83ddc48cd434bb074cd74928a29202aaf54ba1e60fd7cd792f. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ARF411200827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268e9ff66cc6f7089a7badb6a0b73eedae5370d86f75f093b144d7ffe82bae0a. 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/ARF410700000.