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 0xe57228fabc722fe91ea39d377a39b5462b82cfd5be39dee8b7be389729333378. 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/7087f2c6-a1a8-4d01-91d2-be5f1ad7f3c6.json and https://artists.proofprofile.net/proofs/artist/7087f2c6-a1a8-4d01-91d2-be5f1ad7f3c6.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 0xe72c77d72388e78d0cf8a4051f0c7e6f19fe2cac5689670f34e944aa96283797. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:52:41Z), 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/QMBZ91933829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac05c543abd0e9ad380630cfef48b3de8b211e7c5269b2bf6d2d8c28c9995096. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMFME2007614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883bc5ce3030a5de075a0e7b3fe40bf8e55bcd6c657fd6fddbfe2c011a2ef2fd. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QMFME2007627.
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 0x5caed0924287dc8ecdcaab6e13b94504b4adfd188b1b8e6e1ce58d55f69c3e66. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QMFME2007616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d78a3616ca6e5be4db6006945bab8dd55b15e42ae4ba008dcb109edaaa81cb. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM4TX2216898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ac6b1bc8685c2c534da00bec9613280a790b645c95cc8dcf46176d9b4044ae. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QM4TW2479992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54b6a13878080eb9329c42fb645a245741e24618fbc2d3c34f27cfa1dfd6c3c. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QM4TX2457818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7584276b7cea663e80d0cc316e82703a2382ba6cc362ab46f4c9f3c70399be92. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:31:41Z), 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/AR6B52400100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0483d104b87fe136239ca5cc86bb0083da039e9c84ee55f6be2e18632de2951. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/AR6B52500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fdc92cafe70f8b22e2eaf22ebc7e4a71cc983cfa5b1c29444ffef6e73b18a0. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/AR6B52500073.
No soy un stalker, soy tu ángel guardián
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8028d493907aa2b40f535c2536e50100b22e4e24f0305e6460d66d6aa0dac7. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:47:14Z), 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/AR6B52500088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69f99ac38be950823a910b1eb17d6ccce83bac12ef12a863acb3ef87e5bde99. 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/ARF102200089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36bde6ab7b68ebbb3f9a3927125f3fe81efa65d691d51239d1071da479f26c2. 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/ARF102200093.
Kevin Johansen + The Nada: Mis Américas, Vol. 1/2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4a4121820b784884c61ae48c8cbbadc2562ed6d0095629c005b7494ae65377. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARF101600185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4a4121820b784884c61ae48c8cbbadc2562ed6d0095629c005b7494ae65377. 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/ARF101600185.