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 0xab153fad6ad0650f71b82c1ca152db0b5290fed0d191ad6fa81627cd172ddbc3. 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/3287d063-6423-42c9-a2e8-de098834be90.json and https://artists.proofprofile.net/proofs/artist/3287d063-6423-42c9-a2e8-de098834be90.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 0x0cab14fc77b0d0926741cd64f2df57acaaea2475d83ed483281514ccb48dc6e9. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QM4TX1796131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36ce7e9be7f5903f9de29aaa71f089bba3041bde55e66510e3d4e888f319b15. 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/QM4TX1796133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292468bc4021cc89d7e43e15344494b567ba7e343ccae33d894632b887a546d1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM4TX1796140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f79762cd6100d9b4a026247ba591d8ad7629190529e0cd27f83d00cf99daac0. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QMBZ91714362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dddc32d1ec4d76f7912879b547c83ee8bc726d08a4cc698f01040e2da91c3e1. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QMBZ91714364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf368b23abefb671d95be170ea9e1f57478eff226d90bd74645fa91d2db55ac88. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:48:56Z), 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/QMBZ91714379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b42fb9ad5aa5682dc8bdc84c5d3929a96aa3396e4671468605ac25fde7410e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMBZ91714380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd424d8ac4a51ab9566a67f2707abe6a2b7d2514e2be3142f89482e16d5948ec. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FRX452010656.
Impossible Love Songs from Sixties Quito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f341d533c0ddf5a4c47fb91e83b8de2913b7486c2ed03016a581a5b2824e33. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QMDA62162442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e709fa72d736476bb005d07f69853a9fef3ebeaa3b376d1f732ceea609dcd2b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMDA62162448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa167082205fb68bf67fa8216b29a18e79a9605c423b359fc9572bfe46e6051a8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMDA62162451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a2bc3a6c52681dd38039c47e7c9eb8321067a4054cdf806265b85058bc93c4. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QMDA62162453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c16708ef4fa15880ed8e1464488490659c30e9f93213026486674be53ebe70. 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/QMDA62162460.
Zorzales de Antaño…Al Morir De Las Tardes
Zorzales de Antaño…Corazón Que No Olvida
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dde4d318233c2568684008bf20381f7cc872bc5f888ef84aa6bbe1120e2d1e. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QM4TW2495045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f29163f0b64ea5b32c06f4478d38b9c13197c570ee4f896a8e3f313d95a979. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QM4TW2497571.