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 0x7588c966694637ccb9bc813507a9ad42bb27a8679ca5d3e257de5dfb036d1f08. 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/85f5b555-a9fe-466b-8458-7f33c8494eb2.json and https://artists.proofprofile.net/proofs/artist/85f5b555-a9fe-466b-8458-7f33c8494eb2.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 0x8350fc3780e9909cc1228cce40d506f90471d81c57ab917741093ccb3b040849. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES71G2418165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff6e0114742cc4ba8d2a657f42d4fcf5367b6679f4369c27b3b8d448fe0353b. 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/ES71G2417886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b0d2271ecd62bf47a5b5a13c0bf016dd8bc478f3f01bac5ba7513cade52939. 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/UKXN22406118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b30fdf33ed59141ac6bc12cfe0158c9a436593dfdd34d50192b1e99236d85c5. 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/GX3Q92404752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3763d778867f7b9f91d1ea335cb8b15017344d079794d839bb8120b19b4dddf. 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/GBLFP2304122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8350fc3780e9909cc1228cce40d506f90471d81c57ab917741093ccb3b040849. 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/ES71G2418165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0a4314af772c8311d06f0a240d8e0128367c98cdaa5d55856cf7c843f0fe1a. 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/ES71G2430759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2a15c269dad0376425a1de771e78982d7781c8154b95fe39b8bae8de06975a. 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/ES71G2500738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b118d6b6f8531299181b604318c3199245831d26088c39d77834b666ad37a71. 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/ES71G2430773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0a4314af772c8311d06f0a240d8e0128367c98cdaa5d55856cf7c843f0fe1a. 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/ES71G2430759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e722d56d5f23434d90ac74ee8793d1a8fb6d203fcce98ca29374db8e1ff826. 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/GBLFP2452519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b021ff5fd0a069cc2ce869cc8644230610dc824c6c118714a9a6d5446e4e1d. 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/GBLFP2277630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7763ba1e1fea280b51c3f69803d3da988a797be3ead3f204220d64461beba8. 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/GBLFP2235440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb8b7a0357034c7330634c4d0b6faada47a24311de01db82252a199b44d3d12. 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/GX53U2093283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29a5e52607b0c1be38cdadd4eeebddb0708d789c913545522341fb27de48b4e. 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/GX53U2093277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b332f14a9647727a7da965b76c3ef6b89a038840ebc9c4f633dc2ffb3d4730. 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/GBMA22165079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c5d5b1a401ffb948fab3db23706d3bdfe91a13babea4dfbeaaa1a305a231a1. 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/UKXN21916610.