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 0x93888ac1fc3682b881a7909492471d85869d5a17311a0096e0ed5a7461720019. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79f88889-15a9-486a-b406-6d60148d0225.json and https://artists.proofprofile.net/proofs/artist/79f88889-15a9-486a-b406-6d60148d0225.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 0x142a454d1cb1b9d0bd5804ba90f4c73cd176cc17c989ccc333bcb6c76c48a629. 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/GBLFP2370927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9d8be664dbb850e5c0c214abd7dd6114996a28e5758fd9d372f306d16e00a6. 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/QZES52011884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9d8be664dbb850e5c0c214abd7dd6114996a28e5758fd9d372f306d16e00a6. 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/QZES52011884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0586561ce8a5c25903570ad59dc0c82442990c499bf2e0df8edfd3366313f26b. 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/QZHN32281613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ef53dfebb5b2d99080be71c86bbcc79b38f4bab0175bc1eef04e050d4c919d. 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/GX53U2004742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c9336d3b9a2a259bb1a2979bf4b4b75c357fdea5e33b3026241f0ea6ed19e2. 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/UKXN22119399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c9336d3b9a2a259bb1a2979bf4b4b75c357fdea5e33b3026241f0ea6ed19e2. 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/UKXN22119399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c72340b22e33c0548a4841ca61a0cca76de841c4fd371781cc4b01419bf832. 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/TCADU1892344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72faed9735281044a73ca7c458d0ae743e022087c6c6801dbeebbbf82fb609af. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6H2360187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4268750677aa6b7e29d4862beba76d7bc24821cf889b88b756fed347e22ebd8d. 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/QZK6P2434033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12857f663b063822cc6f3a965e927d73d16eecd02e3cbc9d35c3bed3ef39373a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBMA21857339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51d03083e5feb97d84166ef86c0fa965be861867eba1a3a76b99b1aa7cd936f. 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/QZZ792489611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa991457f50739dd0d66e706458bf9028f5ee36e9a10add7b81e805449d817b51. 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/QZTBA2317891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f6e47e4706e8aa1107c13dea47fe19b47217de735f2e67312b853e916c0ad9. 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/GBBKS1800043.