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 0x62040018088c3a8ce245c4612e3e6b764d6315028680226bde8b26870b577fa9. 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/5c7c6657-be28-4824-8fcc-78c269e694eb.json and https://artists.proofprofile.net/proofs/artist/5c7c6657-be28-4824-8fcc-78c269e694eb.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 0xd6506cbc5dfc70cc886431d4cee6dc831c37d288a7cd997d6a291fac9a1eef2c. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZTLA2280104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d0e8eae77dbeb5750d5e2cfc40a117c3864319174e7bf8e22f16efb3f880d5. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZTLA2253711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4d62d777374b30d18d6dd0524785c1749c470f7d7d25a0d52fa46cc6612dd2. 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/QZTLA2232820.
Ya Se Ha Muerto Mi Abuelo / Recordándote Soledad / Cumbia Sincelejana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6f27f61e88d79027c43f6c37d4faeb97f8d7f8be817c5d9c68d6b1fc1b60b0. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZTLA2223320.
Zenaida / Jalaito / Parrandero / Soledad
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d4d525eaa0da1efe111124374be9ca8955381264b8237643cdb27efd273de3. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZTLA2203863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae388df2e13a83099a17a90c81edfb191be721b24819fc308ee2029bf6533ba9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTLA2219647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c9cad65717b1e9e0ee68eb529a33b3e083fe724aab6f43ec9a239fc718e410. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZTLA2200931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dfdb31ff2cfda027391e10a5c9308678a2106f772922105ef45b6d0912a561c. 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/QZTLA2264027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abf861b252eb0e7b146c86e919357dc12b690bac378f4676055ee2973f8526e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTLA2212236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66333e2b66fe51b3418d16b0fd2d99900295c70103e37c4f06b8dad48ce22867. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZTLA2279617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b9a6883cbacc2b12012ea1ee4383411b7fda4d6a6b729c098a77922b7bfb6f. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZTLA2276429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3039ff959d5ce36d4107448dcbf316e0e193b40fb8c712cb71211d938a0ec8ff. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZQAY2251459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ada677603061b31f03b7aeb9f980d1a928b6dbf733e002b1949ae240619717. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZQAY2219594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7674a0c206fb563803cf8130663eda99da6fc86628c9c4668585c792b935ee. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZQAY2222715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d60961bbda2e6c996b58a68b6214a0a3626f24e2d1914342f29f47c19d284c4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZQAY2294713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3294b03f35d3bc9412857151015c5fb67bb64d37612998151127f2a3ac302bcb. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTLA2274917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8354d2ffa275687525df272fcf0f3ceb62bbfd3168d79e7827016120036df111. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZTLA2236419.
Agua Rosada / Cuando Llora mi Guitarra / Cumbia de Oriente / Ay! no se Puede / Gaita a Cafayate
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c2b9ba6dd7208febca25c721e9c25a1b2ce3b13aa6fbb1f3465eb7761a1a32. 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/QZTLA2292932.