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 0xc4c209ccccfd69794be4edc09f3955efd1ab0e744af487eabff8b9fa1930977d. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a148433c-6dde-4cc4-806a-c5873412a1b3.json and https://artists.proofprofile.net/proofs/artist/a148433c-6dde-4cc4-806a-c5873412a1b3.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 0x4fbe896ca520f72bd196a92db89b11e8a10aa029470a5639c97994fb67d64c36. 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/US7VG2086007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae39b0a17815da0fb07224db6004c0003c97c4c4c43fa092a4058a196fd502d. 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/US7VG2086008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0bdd35aba4e326b6fb202cb080d611b1b02b4153c486e3c151e41bbfc89602. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US7VG2086009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b34870650d0dfc98a34b849e5daf582cc37bdbe631d592853455425221f8df. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US7VG2086010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813ff7b016d8f8c0259f3f2ddec6d772ffe6f68eb6d402ec012cc35ed55e4114. 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/US7VG2086011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21341d23706b3d78e0b263ff084c54a6e43f8b52db63b6272c24a28feab74d8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHZ41993906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd303b3698dc61a72db70a94c6da8905d6314f2f89ae034dadc7f965ba6717d0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US7VG2086012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f4da09621f0e710467147d4664f533d3aa89b2b146f5a54b1c5770ba71a99f. 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/US7VG2086013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625344c9c00c11e5afaba0aaa235e9cb029851287087fafc90fbeee64797134d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US7VG2086014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd344f6e0109bc511c42da14e335c84ad92566a4612051f191acc32548cfd355e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US7VG2001264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af34a22f48547955fb541b9b8ecfee58b07cb30c9dded71b9f5b8fb588ee647. 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/US7VG2024653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc0bf149c7381de31679348b0652359c8c6b911bff0dfb78631912fde288836. 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/US7VG2086016.
La Tristeza de Estar Lejos (Petricor Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b93f3de79aa7c3335e3bc659984d576de2ff2903d7f947c6b5ae145615aac03. 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/QZNJV2084996.
La Tristeza de Estar Lejos (MAV NUHELS Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fc839ed9d7fc8a66a54ef8a232b88a1563dfcd80840c3260a3ea23c6987374. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZNJV2084997.
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
La Tristeza de Estar Lejos (TRAXXGENDER Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b2ee691f4fc52c53748c1cfc799000cd6559290c5c68a83e877c2b6b8a2c56. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZNJV2084998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba210cc8dac496fbe89dbfc6825a55a5527f8ad85c98e1afe1515e32b97ca3f. 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/SEYOK1758288.