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 0xf03dbae61a7061662aff910375dc68bfa2fd69521a635c7280f0dbdbd15de6af. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1789f70c-4ad2-4716-822e-34a2fd514739.json and https://artists.proofprofile.net/proofs/artist/1789f70c-4ad2-4716-822e-34a2fd514739.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 0x3d73fca556bc43b76cde279300b425fbf9dd726df1ce3b8b623c190b3d768d9c. 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/GBWUL1570608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad34d4fce6fb9c54c66203f1914b8d45d5e2b12f4b1a88dddc513e787fdef87b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:50:17Z), 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/GBWUL1348742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4903f31dcd90cc2bbe84167671b5095e34495872caf8c485c1ca37ffea1124f8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRX282583008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3058c26c17c76c08acc0700b5fc2f93f61287244fdcc9a0697134d77f7c2893. 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/GBWUL1345660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cf9a9edd3b424f3684719d1f6e30d6bb61c935d4b733f695e28f6136cdae32. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/FR2X41947442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0926c04b5f41158739331b2580e0448bb42b0f8e835f9db3976b07c10c574634. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR2X41947437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7884940385232649080198300a62f8bbaf081ebc94f4d945092b7aff803bf4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR2X41947438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d135825d3cdba11fdd3f88fd8052350f968cc9b45899341c7ebf326c993d1ae. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHN51945452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef6e9206c19f3f3608f177bc334353500f9af4103446bb07a677bad0bd51df7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN51950469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5807acd8f285ef5b9c86fe33a3724fd5138a4a335bed613353a7f1862b360bd8. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZHN51950466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272513502e79b60f5dcb592de53b81a341ac402c72e10130543d6cdef543bffd. 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/USLZJ1873852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ddd34d01253eb9c5631f608e4a3a4902d5b075146901c50e506c816a4e97c5. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/USLZJ1873851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb975d987f5c8cbbe16b5d42e8388e5923068650f376fe3434c97090933ee42e5. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA72025333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04b686555fbb2ce6e076ed05c14e897b015e1e0d9b4731d9fe2b9310682bf20. 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/FR59R2285059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d718bb056c7424f8f1c1ef461b6817547e18ce3d87f0d00e5a7717a5797ac0. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:18:52Z), 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/FR96X2210635.