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 0x92437dbd513c433cddf8a1b445812226091a92a58fcf08d6e72fd1e7be3194cc. 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/381ba8fc-e2e1-44ed-bc69-1f93123a7820.json and https://artists.proofprofile.net/proofs/artist/381ba8fc-e2e1-44ed-bc69-1f93123a7820.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 0xc3a876b78bb9a25a9097665b12074815777d3672bbdf52f3a4a19111e0c4f708. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-17T08:58:23Z), 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/QZSYP2314307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe924288d712a95bcae2cfb8f02ce66acb116f561971d1de07a7977dca35b17f7. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:38:11Z), 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/QZHNB2435112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b28064f2bdfc83708722bbff02a1e401da104e48ba350696a4e53cc9bfbae3. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWV2405557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37604781ad4e760ab1c6f1301349d345bdd3e463851849f5597002e7e504451. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZS7J2445374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6757b6d1f5636f588f414bf02ef233d735aff81b376f18e726e07753aa1d182. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZS7J2407643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b78c948044a193af024e3932487020c15bc6bef5182ad5a866db6e08768c12. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZS7J2478554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22c73960cd49a38c9fedd9536196c592a716126687a62a3d4da9b5e0ef24e91. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZSYP2463328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54772c74ce58075e631b0c65ef3650cd0100f88099fb3438445c99b28651b0d. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:51:12Z), 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/QZSYP2403502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37604781ad4e760ab1c6f1301349d345bdd3e463851849f5597002e7e504451. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZS7J2445374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6757b6d1f5636f588f414bf02ef233d735aff81b376f18e726e07753aa1d182. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:52:57Z), 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/QZS7J2407643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660b4d0b6563e40b18158e97c70b78a09d4d3989dbcbd9e762b75c5209227668. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZSYP2485556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afa8433180fcf390bae49e539833fa0cb0e243afcf1fe29cee362bfcae59493. 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/QZS7J2418625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c5c55c1bb980197561b520b40b9f3592efdfdb8f63d3a4f31e92af6ce36bf5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZS7J2491430.