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 0x12b895d45f8327c600b8b181d086cbb81332d64075c671ac1c5f7cf0a1c1be24. 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/74da1af3-de17-465a-9993-f03ef6cd35be.json and https://artists.proofprofile.net/proofs/artist/74da1af3-de17-465a-9993-f03ef6cd35be.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 0xfe2bd7ac0943a810f453b6508799826081b6b2cf38d72bede0c273059d0fbf64. 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/NLT2H2000449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ca640088a3e96edeb1e400fcf8341718b43ec899ee0225bb322aac7ad9be0a. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/NLT2H2100507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa447be6a2e48caf3e0f5d9960461166a34d1a6fc66fade704ff08f4e28008c83. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:44:37Z), 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/NLT2H2100779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273c6ed9d7e1efb5008d2d293aadce7264b0772bcba1a3f1a52a14b7906a0a13. 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/NL4WT2000198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe25b4a67b147fa5020f6e579e90898288db150590625667304ba6b97f1e4548. 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/NL4WT2000246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28376af14c8ec9c6b09697108e73fdd64b1678a8caabacb465b8f8b2e4f11c9. 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/NL4WT2000258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1259fb594af434be8c68d15b1bcede3643dd023b4f1714beac905ba64f8d9d3a. 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/NL4WT2000259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242ef6c7dc6cdb8b8ab5a86207e369e909f5ab79cf3e53a4777b9a122586c0be. 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/NLT2H2200156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07d3fd91d0e967d37601ca4c3ef4a2c94e2e093f42d4e7cc080dd692dd60b62. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:43:02Z), 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/NL4WT2200091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3030f6e893938df83d23048f2dcd59ca84c22fc5dc2dd334b68ceb281dc1bba. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/NL4WT2200111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3986e3eb2f3827ab8609f0e9d0e85721cb0e61759064976ed563a79551343a1d. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/NL4WT2200169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6196fd7d2e96bd1b7ab2bbc128bb3658536ea25dc64d0aab264b94fb1ba179. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NL4WT2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df7d31a67881d10d9d2148dc323dbb6b9ef73b08429d6f1fbb785ee83582be9. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/NL4WT2300060.