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 0x68acf53f91138cbd14ff236bc7412a5905069c5b5b50f219180c77163ba77dec. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6037e51-e8dd-445c-8aa4-e075b773be4f.json and https://artists.proofprofile.net/proofs/artist/c6037e51-e8dd-445c-8aa4-e075b773be4f.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 0x8bbe05beb5d586015816186a9fcb2fa6c0f7055a93ccd2d0e7472ec2d66e044d. 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/GXD7V2548999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c4ca109003093fc6aae10f0542ec18e142970cfac2965a16d68f93495ad858. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GXD7G2570903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bebfac3d410a71d1fb608f8a1cbdee463cb597249f2f4c9b8744d17cc8537e6. 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/GXD7G2589709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf458a14ad79462f2ef9a015695c39a0214367fcb7d1dcc385c2f326dd4d3099a. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/GXD7G2512325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f041c90d6d894077b21857a304b3f656cc41cd22a530827b5edf4ab526b1961. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:02:57Z), 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/GXD7G2538656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167ce69730e055891e7d86aa72d12560d62e32253d825b534547008e79b6216e. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GXD7G2554506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cbef172545bcfd4bd8279b982170803a7453b87826e373490c272deff49372. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GXD7G2515317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ef655253ec4747cd39f79669d8a98ddb7d26e53cbc3a0e262ed607a35e8fd2. 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/GXD7G2519302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba16b4a8310980a3dcbb625aeda348d9c3fcd5fb92e8be17e3ad8066ae8a28e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:32:38Z), 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/GXD7G2507010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab5eeaf2c9bb87b3a21e937e9e1a4b3005fd03999ba2fddf853a4df5baa1286. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT5M22547062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ac749098aa89b1094db4884ed88f42c09dd753f1e1d026b94449a9ca9c4480. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QT5M22512078.