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 0x31bec0d31d194ae6903549d6ba4eefd77f21bda53a18f9fa57afec25f8cc924f. 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/8fb9eb93-bac7-4ba8-9cfb-1e763ae4b24b.json and https://artists.proofprofile.net/proofs/artist/8fb9eb93-bac7-4ba8-9cfb-1e763ae4b24b.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 0x55b765158e0744236b0f37b060a587e2cee6854aaaf61ee27de0a06d4e6502b0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:57:26Z), 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/ARF060600404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30af2f90f490e12273bb70ef2461d3f9e828e860b8d27a1d50cebff98fa4f25a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ARF060601343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7c7be9ef0d78a2d24cda7e2e42c115aeda4df7324ad39dbf1c81587eb70adf. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/ARF060600125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e8ad972c3ec2f51a630adbe71a2fbb0e60b1cc57024fcc26c227bfa0d143c1. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/ARF060600131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2040cb9f043f204d0d998f9482d15cbdb2c70c83c84d07e8728ca125bcf4fb97. 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/ARF060600132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6354dac6b7365323befe23a88cd6ab215dd53fb4b73925aa196b38746e304f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:11:26Z), 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/ARF060801792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcade9bf980401129eee7a17e1ba57bccd004430c194dc9710265f08eafe78286. 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/ARF060600394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e47c8bab970685dd08a7195a9b4994982f1a9cd1d5fd3d4122aeb629729b97. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:16:54Z), 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/ARF060600135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2040cb9f043f204d0d998f9482d15cbdb2c70c83c84d07e8728ca125bcf4fb97. 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/ARF060600132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7c7be9ef0d78a2d24cda7e2e42c115aeda4df7324ad39dbf1c81587eb70adf. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:33:06Z), 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/ARF060600125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b765158e0744236b0f37b060a587e2cee6854aaaf61ee27de0a06d4e6502b0. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:13:32Z), 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/ARF060600404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783462e59d073c1a6e14ddf46c2f086215fffb78db0dbd944e2ce791317f1e11. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:33:54Z), 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/ARF060701186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e6eb222a035287e3cd666cd7ee381f0f05ec7a2254d3c03340e9bd1fdcf562. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/ARF060500154.