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 0x941bd463b052fd5f211023c1e2ef4e30e2c633d2dac4372cd7836e23f6622ca1. 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/7eecb5a5-0749-47c6-8c4f-0567ee234483.json and https://artists.proofprofile.net/proofs/artist/7eecb5a5-0749-47c6-8c4f-0567ee234483.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 0xae2b6480eebd757ead075471983ed89cce5d25f272c941439026b09c6bd15aa0. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZK6K2302714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1078f458ed2fe2e824896906f97895941e249ab3c2f2b81cbd7485b8bf87ba. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6K2302717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3beffe73941e6793604ce25f7034eb93487ebeb87e6ddac579b51ed45ee817a6. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:25:39Z), 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/QZK6K2302719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf397b4f6f0e01f013dbd9291b0895b276dc9bdfea4aedb6f42e374f4a42688a. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZK6K2302720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c791302464a726221c773d620d6305b118ca3e3a5825869c82066a2a60baeee. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6K2302721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed08d5e39b5a025251282c2abd084759149d3f1305e891ef1e844a1f7f76764. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZK6K2302722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd841cea21df9d6f6847402d2d36e4ceaf4f09b70ce92331353530743d8c2cf2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHNB2484138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a3f02da52a55c19d3f1c3fcd1f668ed5e329f253759905fb14b062aba3f574. 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/QZHNB2484139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcac74a07c63965c2052cc77b9c721d3e5dc04d7fe20a5e5a851a6dd330632f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHNB2484140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33e32a813f54c67b01d33450529daf9f7c232ce0b52fa2fbfb14a27c29906d2. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:31:22Z), 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/QZHNB2484141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7378d0ffc65592a5a47a18d3d2af94cb458084daf3f162d091956e44f4715f4c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHNB2484145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb11bec3fc4f3c6e65887b220e98113edf422fde571da3673fcebd9439a101bf. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:35:48Z), 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/QZHNB2484148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fea477d971c92c1b5f278cd77ffa36a1c5e33f22ef12832ae68b95bade24ab. 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/QZHNB2484149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c6c6cff9f7e13b53b97246702d431ddcf8a2dbf1e826c6a7c7207545db89c9. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZHNB2484150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0511b977d58740e884488f8241ba6d2c0f21c05b01a3045db843e25effb0ad37. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:23:05Z), 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/QZES72592679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf2106e87030c077893849aa1676d76e354961f59a1dbe10c587364f768bfb1. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHNA2504969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c3b470d0ab52ab48a54cb6c3b56bdc342395c2b8c520be6099509c7d155510. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:38:07Z), 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/QZTB22589491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7341521fd4cb71791475337cd5ed68800d7620d6213a2aa6a2912e3619216e75. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZTB22589492.