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 0xa29fc1fb975571b4fc3e140a1919cfe25dee8f2d904b3cde7cfbd13ae4e5a9f4. 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/43ac349c-88ff-49f5-8173-e2d4431dc4d8.json and https://artists.proofprofile.net/proofs/artist/43ac349c-88ff-49f5-8173-e2d4431dc4d8.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 0x72b4d953692ddc5f04c369cc3dbbb9ad575c135744c0cd5687f67093d4deb51b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QMDA71587412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa5c017c613ec94db3e336c3b448d504341524420302c46a51d1393eb6cd054. 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/QMDA71587413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542befcbe35efbcb1618a2cbdd6928c2d90470f5c8f53e0b615e2abe2c1c4c50. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QMDA71587416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49699feb772d0ecfc87f103a566e16096a1968a8f9b7e9f8ac33142779ba95cc. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/QMDA71587420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a5ca94c2e51ebca892964cd3de97d675827d287a9c57e2478046dddf3baef5. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:36:03Z), 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/QM4TW1680533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13c180f52c36af71a96d8daf9d7bb6e1a43c242e609a053e46ac31745a2a218. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QM4TW1680534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd860582ca46500fcb1eb0d971aa71b00bd5cec249d5889a01baf6e5b6c42d16d. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QM4TW1680535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3a477e38a3f01c5c52b95de74a88cac4fb84a0fd2f5b342f174445eccce834. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:02:46Z), 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/QM4TW1680537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cdf9e2cb75877b753c9ef76a3ef444fbbc1e64bc971c67558bb85e8ad2d50f. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QM4TW1680540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69ef859c398efb300823969e171ee484a7155f6990b66d5a392bfd4222eaa65. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QM4TW1680544.