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 0x7d4e3ba01b990d1e9900f242ac6be9f5bbd7b5947a579697fb2aeb9c3e59a04d. 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/581d9ddc-1a47-471e-9126-330e93eaebaa.json and https://artists.proofprofile.net/proofs/artist/581d9ddc-1a47-471e-9126-330e93eaebaa.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 0x619a866b6bf7e30acff303b54c67d890f60a2d4daf36d37ccd82fb796569bcfe. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/US38Y2314607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f17ed9712954a40bab9c90d001e4252fdd89d8f635f3c37dcde71efb9fae7b. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/US38Y2314608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a59f8958aa3358bcf0f28b08a701e6325c5082c89799024203885cbcba4b0e8. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/US38Y2409607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddcf7e5a92a1b8e34baf3dafa578f8f3df7df347cb8beeb2d5afb9bac4c3238. 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/US38Y2409608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0a409261c0b40960f3d82f8c6bca3acb784c38a18fd8994d4777abe3a0a449. 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/US38Y2416978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceee411cebf60bf87d2cab60f183dcbb4f7b1cec8f11021b7a802362cac0fd35. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/US38Y2530786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfee7e5819a07ce4fb5b436b51853f16beb051260db0a6d2eb0793693b1e8403. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:50:24Z), 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/US38Y2533350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95b3867c2a39d07e1af9bb1a252f8064fc34ce13d106f3774bdcfeb60aa41ce. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:50:18Z), 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/US38Y2533584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f03d2e3f53bb2213dfcd12ed9158bd719736df8a1c951f9774b422443036c6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:54:32Z), 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/US38Y2549993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74880d5f3647b3398b13992ec8f62cc6357fb410e2cca13bb18bf5a4293214d3. 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/US39N2515874.