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 0x0875b295f2cb5fd002f4cc4af7940714cd9b66ef292a65e7000587635c288f16. 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/6372c625-9737-4fe2-9cbb-0acbf6ee3932.json and https://artists.proofprofile.net/proofs/artist/6372c625-9737-4fe2-9cbb-0acbf6ee3932.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 0xa1fd41c93ef086d38c7e6882b9e481f99e550028b8980e14fb74a2d9293a1600. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/BGA570600134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0217d72a4d32f8e8f57c18ff3f646553942c93adf3b3e5f0ca42a8b6bb920c44. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:08:58Z), 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/BGA570600128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd944c9252a8e278eb9822ef84112f2d26b6341828974b1013ae85c66f664f7d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/BGA570600129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe803a512f1156f02ce53d7a4e830e911d8fd7bc347aa768b9b1daef592277bb9. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/BGA570600132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fd41c93ef086d38c7e6882b9e481f99e550028b8980e14fb74a2d9293a1600. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BGA570600134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec1b85c83c47cd32e6775ed8d9c1ead1efcdaa3917ce185f5c798d310b5a94b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BGA570800039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa04e24b42df28f72242a867c815f491f1234310db98b99376b1b262a9b4ae6. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/BGA570800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec1b85c83c47cd32e6775ed8d9c1ead1efcdaa3917ce185f5c798d310b5a94b. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/BGA570800039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784ab4103a1ff45520b34f1e5d6df78c4060ba6df0f205f2163e17496b252b27. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BGA570800040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2d8ffc0c19a258efc31af67b17ace0d0d016d1c3ae0b18f30268c7f35154e4. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USA371538911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7815d1c4107f0f7f70a1153f0de017758f7c96735ec5b1911f7138c18867f386. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA371538912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b18cb8cfce5e3eaac45034ca483499bc738d9cffd9ad481e19d977ce335ceeb. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/BGA332100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8195d42c149240420cc8b253ebb1555689bdaa25bf82687e9d0a32e3a72d2881. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BGA332300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f8629893bba90b797da505dd52640ab878e32678dea428d448a62a410a70bd. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:41:12Z), 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/BGA332300385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab35f83cfa744a0120347e5e8e3ed33c32e0f1952874c2f86299b6bc65cc7c8. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:53:48Z), 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/BGA332500146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4974b680026332897640ca1cd4d9c76bc9e2e25efff7c2db9e22a87ecdeb1c8b. 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/FR59R2420165.