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 0x261a1cac1ae35fa0cd790819c03d7ae832fa12ae3c5e5dde5130770f39a6fe94. Chain 2 (Bitcoin): anchored in block 953923 (2026-06-16T09:51:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d1ad46c-0ee0-4d26-a1b3-321f18df98b2.json and https://artists.proofprofile.net/proofs/artist/1d1ad46c-0ee0-4d26-a1b3-321f18df98b2.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 0x48c9f4a6c0622e7ab9b15a63567db0163734a736276d1ce83036c591303143d0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CH6542203966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0f5fdfb4a4430575a68d17693be10c600dc9a41a61aabb62738c3adba69c3c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH6542203964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8bb905e6daf2690130bd18b16e0c2a482f5cac8f58bebc8f5cfe29b76f0a05. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CH6542203972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb9970aeee091124568153e8555f177c9a4580332e9aa475926f6689f7ec98b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH6542203968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdd35a48124a70878aa460207779debd0c48a8ba477f1bb20200e37aa2bba35. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CH6542203969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa866bfceba6b820e8a549573e230eb41b45f0e353bf1ee78c384b52562765d9d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CH6542203971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f93d886f3c90955e38bc996b05ca9462c572fc8f365b2a652d589bd79325b63. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH6542203973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648b22bd01cbfaa92aed801326d7ad9fc84e73cd48488408a9246794ebfc8695. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH6542203967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9f465d7b29e882c4123e59cbb6953331c86681d72a2d8b389fbb855c8f50e4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CH6542203970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb35eb8ec1e2ec453e0c7680d2b3a5710d696c7248038be1b1433732287b2c83. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH6542203965.
Vivaldi: Andante from Concerto for 2 Mandolins, RV 532
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf129696af78d39c325d5ee9850e605c1dce68e0ab0fc4e7d2e5fe4dea4b9d7cc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZCE61848175.