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 0x8517a039d80a81710b87331d1249670730e80d7c743d473505d86a83927819ae. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f2f9f58-9d43-4d6b-af53-9259a3ff0c4b.json and https://artists.proofprofile.net/proofs/artist/8f2f9f58-9d43-4d6b-af53-9259a3ff0c4b.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 0x001330ccc32102d64cce103c4a8fe86b3d977022eb0162b2c9221355f3e94616. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/CZI691210009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89289c4a94a9829bed937ca3d60493316da51a53c8b18f2ae106d2e3e6eb775c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SKI721500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c3b5ac771d51f265352f2a11b4c85d12dd2489aaa3fef461e322549fa993e3. 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/SKI721800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8e6f1e0695827f1684a266140c6b200d01774fee1e4adbafa1e288ad0ed1cd. 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/SKI721800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa26b64fa15badb739e534dd161a71cb883edfe30649390cfc2668cd3560182e. 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/SKI721800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670c371d749d8b469ddba6a921b4cc3d880cc509f8cf9ab91bbee30d798a1846. 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/SKI721800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1578e4520deedc95a3ec0ec42a0a52e5c423692445c3e358a3dffecb52551f1b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CZF502100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69477dcfaf9723a5201e94928996382c3bc1f28f3e8d06103fef773c18bc9990. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CZF502300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0066edfa9281bbde09fec8ff46c87f8021cc16c6e7d87bbdeb570d87217d3eba. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T08:36:48Z), 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/CZF502500001.