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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa9f1122d8216504e45886a8db7a6719675a3f8c53576ba01aa4c5e34f548a8. 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/22c8741d-d23a-4095-b0ca-a709b4bb0d76.json and https://artists.proofprofile.net/proofs/artist/22c8741d-d23a-4095-b0ca-a709b4bb0d76.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf34e354529f321dc2fd5683ce5ef8a909909a3fb7f5a756e733c381abf4e6a3. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ITVDD2401078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63edf32efdc25883aa2755fe60141ee8a11145e6f1d01d499ecaade1f2de4440. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITVDD2401052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52db55d977a50ea044e5b100b43e883b609af1786431f37120fe7c8b5bd6c02a. 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/ITVDD2301210.
Alessio Bondì & Tatum Art Orchestra - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc490b95db78bf0604ff71f3c6b301b43eafe666f6477796122593a3994ad4f. 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/ITV502202003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bca8ec54da5c075c26f57f08eb22ab8186481bbe34d9f6aed1f9ea208dea3be. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ITV502202004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1f06a1574e73605f2921dfc46b184b2c5eafba20dce34b8ae871de8e19559e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITV502202006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa873ba3d23d65d7321d560f05d2dafb06a85c5a85942e2b5f78c2e3fe3d95510. 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/ITV502202008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010af9f8730e79e2548ec3e82fb31e1654f92baa7b391e1e2c042280880e7d18. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ITV502202010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3b7bc15cedef40d4744aa79c7b96e597a9f429a4b16f0512ada5130d0667c3. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ITV502202016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c74538a92357ee73fc2b952a8110416c408617b703e2e07e55bcc6bc1fa8667. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/ITV502202017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9094592c711cf66f496bedf327ff879dc98c2cd3c8ce7f34b064010edb40ec7e. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/FR59R2273330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60563e0baed976471b1adcc0fb94acea9f8c496191ee0b720fcf7231d6b60445. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR59R2201231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60563e0baed976471b1adcc0fb94acea9f8c496191ee0b720fcf7231d6b60445. 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/FR59R2201231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4de39a3c2f20af2c4b05e703b14296f31f3235b999d447269c3b55f30704fd6. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ITAE42200004.