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 0x31789f7b0dd6bb3b606e2e5d5e6365fed5a51e00177d7a4093f1d56ceb3c66dc. 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/76c3e441-a4d4-4280-9889-fb404a7f7c4c.json and https://artists.proofprofile.net/proofs/artist/76c3e441-a4d4-4280-9889-fb404a7f7c4c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Constancia (feat. Melissa Hermosillo) [Versión Acústica]
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 0x19b15929f089cd578b625a497951d7e0357c070eb3cdd80c5f2d2f8ff9fd97c6. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZDA71993483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86013c946f94746eb6933af66f1d6c2573ee8582e3d4f55bc0452ed5459896a0. 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/QZFZ32018586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ac392f707c72610724a0615fc2d6f6989a305f38b11b86a47515cb685a4157. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QMGR32065750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884eb89063efb7ea40224fab7dc1f718f9ab042e56fec0c7815abe21f58e0c10. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QMDA72186135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884eb89063efb7ea40224fab7dc1f718f9ab042e56fec0c7815abe21f58e0c10. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMDA72186135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5d56f06216ee3bd582629d26ab120b4061d4f83f3c61fe94af1e3dc3eef705. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QM4TW2263948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c3b88a5d13f8c7c8b8a29ebd11b6e9325cd91a2dfde9350b08eba64092a2b9. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QMFME2150925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542a2fe55b791e24a2cf8526871acf0d29c15d3694dc133a317a1379478cfdc8. 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/QM6MZ2440373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59690c505cc0655ff6410fc95eda24ef8a89cc1b23b4832da85d45c904b3779. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/GBRKQ2575761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c6e913d5a2189c8519f3b94b93141faa4be8ab55326727c6642e136e6ba82a. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:32:43Z), 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/GBRKQ2575775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88d72b602d12a42c013892f8cd78202db624d05593fd09c3930913447a6e068. 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/QZES92051564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d7a352cedf566be4bfb34c91f0b4114e200dc467779ea27eefd1c0c08935e6. 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/QZNWS2013512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7dcaa321874fa5abb2ec26879315092e776308a9119ed9931bef63d0f82fa43. 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/QZK6K2005040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8843d141349020013653dcd1b3830312c78777cf04395259ce50bb330b8b574. 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/USHM22095305.