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 0x580623d4c5c8dd13c75a72ca802b9337973fc0b435802766cb6268fe893af2ff. 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/fd29d7fe-8f9b-4440-a8bd-afcf8f67927e.json and https://artists.proofprofile.net/proofs/artist/fd29d7fe-8f9b-4440-a8bd-afcf8f67927e.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 0xbaad9e3768619ac30c28d89e4fc660ab97303f34eeb3537ee3eb9a03ec69d96b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UYM121702211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5980651489b96b4b6f9f5b4dba170894cf44ac60f7dc53dc05dc388163362a72. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/UYM121702210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55be2da12f230c5289814b000e53d23842421760575cb429ef686f84190e91f6. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/UYM121702201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2e2f253dd95a96cd9dd8a412af012c96702222c79a4e07cfdcd8b3776a3a6c. 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/UYM121702205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4ec8956853c213bf0a8867f89dfa0edc5379df22fea4cb907b4767b4a3c6b2. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/UYM121702206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb29adb3ca90440a02331624bc22e07f5ea9648a62488b50d457a50fd532ee8f. 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/UYM121705185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5f5462a9508b08658c5d656e33be959d209fcc96730e3abe548b28014bd3d0. 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/UYM121903038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266c57eedafd158b055883d25c9ad61d465b12089225bec79456e86f8c6af202. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/UYM121903113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bac33069c3e13b08ba7219337af1a4cc49bc16fbc2caab46ceec5a9bcd074b4. 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/UYM121903112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04ea3b226f87077953abc8f6a86ae0748be2c659a8f3049ec2ae423e2f0c2a3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/UYM121903122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cac221fda2420930ed70b6529838aead77135c89b972e7c258cf997101c3b94. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/UYM122002481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889ed365c333b083ee1d5f3d2e185d2197899fa28ea5c57d11a464464fca9ae5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/UYM122002554.
No Voy a Llorar / Lluvia / Amor de Su Cama
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21b34b09963fe0377fd9e39e37824641b913a7eca3df49ded1ee2778f99762d. 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/UYM122104551.
Crimen Perfecto / Cumbia para Mi Pueblo / Aléjate de Mi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641f711d034a026647566b3b6d9e88b3021e935787e401a4eb75bdafb6f34a1a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/UYM122104552.
El Tren del Olvido / Dos y Uno / La Fotografía
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc43a412230cdc7c8027f1eb198bde5d714d72dfe7c37e0e933c8f30a7fc3bc. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/UYM122104553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39eaf229536770b6f1a8d3a509df09cc9c2cfc07275bb62892ddec132392c721. 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/UYM123000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23432dd2df20f7c663d7d012d637b192656ed300b0aecdbf4135675d7f70b061. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/UYM123000929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214f6310cf536ed19a7f5d1676ec44d7caafd9e98b5d0215076ad2d9e77a7a34. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/UYM122400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f39e2914061441bcc81a7bc96365707c6e9af8c85cf219049cbcd1dd37cc6e. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/UYM122400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065ce16faa03a5d07a5413dc8348b55ab9c966abe0caafef1cde30a11ea1676c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/UYM122500575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2e2f253dd95a96cd9dd8a412af012c96702222c79a4e07cfdcd8b3776a3a6c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UYM121702205.