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 0x95fbae69cc9d61978c7e31551891e368211fadcc49e6213db06390a813c28fb9. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc041c1e-25e8-4c97-983a-50ff34ef443c.json and https://artists.proofprofile.net/proofs/artist/dc041c1e-25e8-4c97-983a-50ff34ef443c.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 0x805913e75fd43c00dc5a4ee7277ebc23b3eda442c43fe7aea6bf578b0a496694. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ARF411001240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1ba3b6eec9228a0eba4c9ca1f0875b47eae2ab51ca4a5511790f8bf9aa8ab8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARF410800064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e2ae8b0d8053e94e099a7d9a83da34ac6f3676331bc660266bd0b283f70db2. 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/ARF410800694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1ba3b6eec9228a0eba4c9ca1f0875b47eae2ab51ca4a5511790f8bf9aa8ab8. 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/ARF410800064.
Bailando Con Astor y Miles - 12¨ Jazzy Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d449fdb388431f25ca74aeec264b5b15ca16abc763329b9a4aab08adc36f4d7. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ARF410800701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741100e8dc11d949d815fc01c8fc5bd626c1054ab71370c71cbad5df0259b258. 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/ARF410800697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805913e75fd43c00dc5a4ee7277ebc23b3eda442c43fe7aea6bf578b0a496694. 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/ARF411001240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c53e25cb7a6b9022824e525a94f54eab0d94ea2e4e15ad3cf6b0c34c5fb7b7. 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/ARF411001247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e2ae8b0d8053e94e099a7d9a83da34ac6f3676331bc660266bd0b283f70db2. 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/ARF410800694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1ba3b6eec9228a0eba4c9ca1f0875b47eae2ab51ca4a5511790f8bf9aa8ab8. 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/ARF410800064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8cdffefd1d534b1fe792a3945d9f16aabb6d38aacc24203ce380fe31ced75c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ARF411001244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0fa2b11b64712ac4fd4e1aa0ef039c4e1faf0f6e5ea548f43914ac28d69798. 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/ARF411001246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f37e566f9cfc17df3615d5131c4d560d5c916e3b5a0a4bce0fa4e1a946f102. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ARF411001248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741100e8dc11d949d815fc01c8fc5bd626c1054ab71370c71cbad5df0259b258. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ARF410800697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0761b8bd0bf08a92ee368ac0f1980e58d9baa3e759554ddd3005b921e227439a. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/ARF411001242.