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 0x21fc906c45a0fce61016673d78dc049bf5c28ae658549e95dbb76c3ab239bce6. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d76d2830-7143-47b8-a81e-516184f065ed.json and https://artists.proofprofile.net/proofs/artist/d76d2830-7143-47b8-a81e-516184f065ed.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 0x07c542eb10be03e69b1b890c39020b9bfdaf79fe657ae63f2fddba61962eb63f. 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/USHM22174367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320166ba0c19b83d885c1292237ec23eee06bce65673ebc912e1e21282ab3f2f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM22174368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9347bc78003636618eb84caac1ffdc3efaf8c8c618dc6aeaa6be8032aae03e9c. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USHM22174369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b18dc5bae3667f13f79f72bd33f67d5bd99ab306c71acc26a5ba4fabc175064. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USHM22174371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e5e704e92e31f26f2e4bc67450066e786b3913b20fbc7113c2968bb7b58931. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USHM22174374.
Medley Romantico (Boleros): Mi Desgracia / Enferma del Alma
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4996f8bd7924a6851624edd991c3f76460072fd1219bebd70d4314a05debee. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USMQY0813501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75a5db8ce5bf0004ad5c6df589e7572e9e446782fd099f5b5c46fecd118ea48. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USMQY0813502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7502d1aba1d0b06cfeefd69894fc98e7532476cc4b35b2d16bb99c983bf728b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USMQY0813503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9398789740559f5cb8aabc60fc25142cc38164dcfee125402f0a0518274491c1. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USMQY0813504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c2f9b2b3fd2400199c2aa3a8cccc8ad08b9e6db4ffbd3cee356f775e1011fd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USMQY0813505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6f654245c6e54dba0578a0ba24c136bbf611e3b2ace88124a95d5a0ab3e878. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USMQY0813506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d05ed0714b44648ea9cb5311ead4666edb42550975a18aedcc1ba82673900d3. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USMQY0813507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6857a231d16fafcd4e5fa56c269a641cfecccee525e1af253f478f94f68d4e2. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USMQY0813508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7069d025bb74c3389c29105a2a56336090b3946d8eb66b8497b5ea77a940db1. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USMQY0813509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4996f8bd7924a6851624edd991c3f76460072fd1219bebd70d4314a05debee. 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/USMQY0813501.