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 0xaea12aa246a0acdf86d5aef5f3c9435dc796d329309788c2e890718655924125. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb4250a3-cf5e-42c1-bbb0-fc4b428e71a7.json and https://artists.proofprofile.net/proofs/artist/cb4250a3-cf5e-42c1-bbb0-fc4b428e71a7.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 0xfabdc6d00bb6fe71e69ff649184b5e8669fe99a7eee49d3d4a459804663cc4b9. 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/NLE850200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056f070afe119a6b339fe94a229cfa6ed91d9089a32642d0aa9e5ecd8ffa5b92. 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/NLE851100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47627dc0b7c29bcacfb72384d46be14ba326bc90b98babb1f8818171ae9cb775. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/NLE850900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1937f2c4f7b54d340e3d1e4d40f79f7388e36fcd574e302049ea37bfe8d221f. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/NLE850700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7645818c0255d59837f26d8965e02367b2a7dd94b9292213257d4db2a1e3b2c1. 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/NLE851200057.
Minidisco 2022 - Canciones infantiles en Español
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9eeb1570ec54eee54c1a86b35f4ba0588c2fec9b41a3fe5f4a4e339e73721c5. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/NLE851900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf069a9fdbf6216931fd1678aa023b53bd623094ff9aa88d5e927c25bc33ec9a. 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/NLE851900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4503dd9d1fa3c16174eb168abdf8865c61cf42f06751f9681e1f0b91c25029. 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/NLE851900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee0daa57923a779642c8c40fa83b1d24544729fefdd4a73c6bd4c424b9cd38f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NLE851800057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e95090d8d2e81c4f19a1e0c8ac9b8ad8daddfcb74b52ba00590278a246f6d5. 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/NLE851800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6749dc7c3965419d51976943a1afcc308494e686c3e579311d0cda625e0ccc1. 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/NLE851800056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81c67feaf2153ecc6d877d36d6d8873651fb749933d0ac37495a503dbea1404. 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/NLE852200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446afb6f2967461c10a136165dfa6d92c9688adc4b72f2194d612903bdde905e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NLE852200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59a039aa426997b9640cb0920991a7d3a938e54a8f60f953a60d28cd8593be0. 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/NLE852200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5e8377fe154e04bd093b13c4e85dbc4ad8b74bd5bf3bb4ced1767152f2187e. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NLE851500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3863d673e70372a0379fd0dc50481e8b76d038d51470b5069a14e20d2dcef13a. 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/NLE851800058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9eeb1570ec54eee54c1a86b35f4ba0588c2fec9b41a3fe5f4a4e339e73721c5. 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/NLE851900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee0daa57923a779642c8c40fa83b1d24544729fefdd4a73c6bd4c424b9cd38f. 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/NLE851800057.
Minidisco 2024 (Canciones infantiles en Español)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876188ce7406ab0c3733caf8bf5be6ad3bd22e1109630972734fa783e52dbf39. 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/NLE850200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7645818c0255d59837f26d8965e02367b2a7dd94b9292213257d4db2a1e3b2c1. 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/NLE851200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a020491190db98348d3cb3e1f583188f5e319c5ee16c251ec3d0f6525de298. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/NLE851600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5652acd082f6fd6c13a8a410db1c9f06db9ef5e96e66bf43128434084017017d. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/NLE851200055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8bb8f7b4800903ebb6e211f9c8ce680224ec8f51f3c34a21eeeac5dc0db2fa. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/NLE851800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fa6de56468fb22c65fa78660517e1b3ca90664a9cba6c432eb7cd088e536c8. 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/NLE851900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de0937555a2b7244e4313f483ac91c7b4e975c22d35e5378c85b62257ba16fa. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/NLE851900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc634f74562e4cfdcf581bcaddc011b54d92791e079e0d60ce3524c89505eb200. 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/NLE851800009.
Minidisco 2025, Canciones infantiles en Español
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9525d34a1b0feda7927151fa4514f24f98977ec92831d92d6b878fe8bcd50713. 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/NLE852400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876188ce7406ab0c3733caf8bf5be6ad3bd22e1109630972734fa783e52dbf39. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLE850200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc4d5d882c0036b27e767a24ff80be13da3bf2263e691bd0229f260e82b71b8. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/NLE851500029.