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 0xf6c8a66037c9091d8669dd3888475bedf665e4073a0cbf4d5824a1f921cc90e2. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ea9bfb99-b91b-4152-b6bd-98b1d8b6d61e.json and https://artists.proofprofile.net/proofs/artist/ea9bfb99-b91b-4152-b6bd-98b1d8b6d61e.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 0x4baf085f2934cf0b18113c69523795e64988ca077b4874e3559a4ad6d259dd5e. 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/QZS652462756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e2e7ddb0bdb79262efcc5fc29c406c1feccb4857502face6e0f9d4679d6462. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZS632404876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafaea7181f8f19a020fbbfa888baba92d617d5cd56c706d975f0e6dbb07cb46. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:59:04Z), 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/QZS662449424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb343a140524dcf159d6322cd5cf682afe08f4b8966929a1d3e5ef36ecc61191. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZS642460122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7403325d5acbd53e7560a0e179272abd1e8885922839fab85cdab0d947f76b0f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:00:27Z), 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/QZS632480795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78dff03c43cf14da6583ca90bddf8547e39c3ab25df9bab16fd55bb706b2e9d2. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZS672456972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85dc4bbc2a889132b72607096064a0472a410dc8d5b8550243058488d243e5ee. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:08:50Z), 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/QM42K2483639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4eb9287cab4a75e55890d39bfe0e4539e9021835801e96081cf1ad9e62b17cb. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZS632422353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf586f8eaba20f2ee8e013d21cff789e164b05016027c314fc5e5b7ce9a88da9c. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/QZS632415309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe364a509d71a69080e6e5901178842a7e4331b61a9bae0912e0c7905db44ff39. 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/QZS642404017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aba1b3d42c4def2c6f60543af2a93a66ef5424455a5f9517bf3d11d8c60820a. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:31:45Z), 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/QZMHN2448828.