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 0x69bd7661fdd8b749edb06bfc80ecddafd8b05cabe194ba6f4ad26d26ed7ed7c7. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8760ce1-ca28-476c-8edb-ef5b6ebb091c.json and https://artists.proofprofile.net/proofs/artist/e8760ce1-ca28-476c-8edb-ef5b6ebb091c.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 0x4961cae4fde376d60843d7b552d0a8d4246f4b76a743259d8d901056482c99fd. 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/GBLFP2377723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3811ac2bb27d035c6ba0a23a1c49b57626cb5697e9471139861b16de6be8fdb9. 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/UKXN22384113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55d53536f104d490d945c5cf331e6a7927c44039bcd632255d58a71cb0a1dca. 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/UKXN22384110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff928327650839c20c6578af0074228fa9f84bdc96c9aa3c215b1b501fcb46c. 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/UKXN22384112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0360a9e910da799b31ba3e160b93f2727b33fc8dd455e1f1c791bced3b5e7f97. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/MX3741502012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed291f710c3b7f7a3ce8bffe1870f9b18f53bedd9ff5d49741b37f32ce1e166e. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/MX3741502013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb010c9a8ad6f98763084a46366d8c258dbd406d5b2ebfd0b9a31477397bbb4ef. 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/MX3741502015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99f04d7b4cb0412b1453365f46135a767801586b19754f31ff4047a88d87c51. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/MX3741502018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511087207c702f9c0304aae5051a912a70d68fe6a781b9c9264c11a2a7515f7b. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/MX3741502019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6b161b4a4148248769e57f4548d1a543a175107901e92fe1fa45255e338b13. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GX3Q92337057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97713f4a46300000c8b73dab50c2d015cfffea83984617fc55fece65974a60d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/UKXN22202367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f73e0a76fc1e521510761f123a8509d61fa77ff0ea2ab70ab443edef6d0694f. Chain 2 (Bitcoin): anchored in block 957210 (2026-07-08T18:28:05Z), 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/GX3Q92170540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9009b7b8d0830fc75f82125ec901a3c6cac9702e33a8d436eec22245dc42c0ff. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GX3Q92170538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135e60850bfd1831d645094e224fa0034888d406ac12847cab5ef63a746026fa. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GX3Q92170537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedc1f9567f6c4cde112e22f67da2ec6b35d562294efbdc299cca4ff464055d7. 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/GX3Q92170534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e5d2de0102d68697b0f76ab4f2bae2b37e4b58153eab6157cc5bada8ce3e8b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GX3Q92170295.
Los Niños Olvidados (feat. Cynthia Montaño)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd36b4008fb879cc7a102d443cf5f5192f433dd3e0e8d25958d3bc53fe45655. 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/USSD11700414.