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 0x54042794dba8be0440cae4d3e8145b221783103f0f4bd877476b47a88f340ee5. 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/84d6abb9-fce0-4781-8b19-d113674d4367.json and https://artists.proofprofile.net/proofs/artist/84d6abb9-fce0-4781-8b19-d113674d4367.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 0x0e74c888bf9511b4baeb5363c3992b99f3ad5ec5c1e1a902112424b1332c193e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TCABD1250905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761fda5c2515d1392e47290d03e67f446937dd7c144bdd86d6355f6a405db131. 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/GBBPP1649922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af41ee7df4c2187e2eca9beec0c5f0de6796320a49613f5fd13c7a9078b0e67. 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/GBBPP1601506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1dfb3e8da36439d2eb1150d070914300d10f3d89b8cc1573d0318f264d2dbb4. 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/GBBPP1602004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13afc0124af3461fcc42d08b2ea197ac2f29174605d3fe07a874b7ae31093c14. 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/GBBPP1602008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefeccbe129830dea2a052d5cd5b9d9c04f9a5558c7dc6f5a62ceebfeeb4a0009. 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/GBBPP1509708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a696d251545dca21484aee4974b6c7f75b1415fca1c0e26f57a99d669e8157. 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/TCABL1351928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b755744c5b762e092f1ebac284968964d5d3fc46f42e663ca2d1b4be50b1d1a. 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/GBBPP1501302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634f4f29e3109a103f28715493c11c34032cff9527504dfddaca8bec7d1f3ffc. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCABJ1294708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0a8aa0625d59440520c2a2e2cb56966f8d8926cd981ce13d3b6c325337b1b0. 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/TCABL1353848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f272ab5d3888e5496cc7cb6013067aced7131cda9f5d444038809989c1d926. 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/TCABL1364412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd0668bb6652e53ba5939d7986ce753a52388fe57fd5ac5856c05ca721bb21a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBBPP1500401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7b0bf90d6c3487c404ceda5d4c3aec066ea23c78cbadcd9807f89418c1a95e. 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/GBBPP1500403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c69a748c6359fc69b9965b25a7fb215d3ac8bbd1eef7fd05918a30d4a962c1a. 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/GBBPP1500408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de4297d1358538f16a0d3678370e0c37a7c03c94df010762cd9b681d7fffcd9. 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/GBBPP1500410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9a2e469cf42c82607f615436bba686e0f94dbf9989170d13bafced95d52779. 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/GBBPP1751694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1150d9a4964aa685c54b12b3071d2413a6c47ea8defe90bdab6560832fce2a. 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/GBBPP1407501.