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 0xac6657a6c94e4c69674547b486f0346fc56c43fda4292cbdc6ff886727fd0b6a. 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/c1db989e-c178-43d7-ade6-8c91b59e605b.json and https://artists.proofprofile.net/proofs/artist/c1db989e-c178-43d7-ade6-8c91b59e605b.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 0x46b3281e5b18312c27e0b552278c0bb4921d3e4e33dfb9400de0b413f4d784e9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX53U2017600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e3a973617ad2346efc5515feeebb6c97f3fb9eb3b8b775e030cfe7e2b5496f. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/GX53U2018096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829727628e4035e054777f5e99a20f068c14c3e2842ed62ac37b31da55555a76. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:10:27Z), 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/GX53U2054918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893d63135b4216e5a01a6b746aa76efdd82eba3a31b8c0a68e3e4574350166ad. 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/GX53U2316215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ef31713639536334e7ffe0f01f47348f92cddfd2b6f21bf895dba7e5b633d7. 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/GX53U2316216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf946ae23046f61466e88a2d8887ac97e48e0623b9c607425dfeb3d551b7cb8. 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/GX53U2316217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf55bed97f1aef20597469161297493a4dfa9cbd1998e37b16e1d41b8c7d93f. 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/GX53U2316218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379c29b84c0c0a071312ec3fa4ba09f16673a851bd8afd28dfe1576c319ee9e3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GX53U2316219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3cf3f4e7ce68d232c0aeb7678ddf02a2cd45f6b9ce31d268bef35a3fff1170. 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/GX53U2316220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22f3a6c837903d917536d3ce316336c388971205b188be183ebf14884819071. 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/GX53U2316221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d0aafadd4394700658746c0dd3a8470014c000f19bb67e172de7a3f215c4cd. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GX53U2316222.