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 0xf772e0eb9ac23bc552f2ee12e175c5b9316267fb014339957b10e743704c5f3a. 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/c2bba274-52f4-4748-91b6-9475ea3399e2.json and https://artists.proofprofile.net/proofs/artist/c2bba274-52f4-4748-91b6-9475ea3399e2.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 0x53d2a15d1e2d4cec0f5d0a02ea16d4e268ae353d568b83912fe04534cf0c129c. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QMGR32211814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3ad17a9203c9bc121d3104fd359e595bba92f3e67510a16925702e217ffcd6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZ2J21502295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91f9c000ab829f31400987fcd90269764f75b5b925cfb6c8a779d63e112dab3. 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/COA7W1720008.
Milagro de Amar - Sunset Sessions (Acoustic)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471f7d870f4cc44313aa090077de01e585e0248c8a30f18afcfe8b238da8565c. 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/COA7W2391013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc4d8531497d6efb5808cee0ce5f376a1e211e561e33dbd0eb31d6acf82c5cb. 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/COA7W2320001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25505e62c5cde444df6a841a42d5d85be318d7ed8065e7f851f27b02a01230ff. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/COA7W2391049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77d4aaedf2aa6fb340f645ae216b7e319526c51ee8d534e5512234edde8b22c. 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/COA7W2391047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99aa5c71362e56d75a390409367174a6ef764aa91733ec7daeaed7610adde162. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/COA7W2391048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41d069d2ff6fe26366788c44b8779fa2e80ffed5c95fcbe83afcbf30ff41ed3. 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/QMDA72216130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07505ecc4d520474ded285ec03e7f74ad4f0fe54dbc24af3845cf1bdcfde1473. 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/COA7W2320002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f4fe331caf3dfc72f8c992ef03aa8f2f4c51682217661a565fd04fad55f150. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/COA7W2391012.
Música Cristiana que te levantará el ánimo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d0f0e0860b2707bab1ff2d8797c00dc8d662e855e88687b176d99391cc517e. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/COA7W2400321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe068082fc3b4aaf90ce5872df7abc037632c281a409cd32fdd6db3a9201d25e6. 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/COA7W1720002.