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 0x0602820f3e7b3c50857ab5f184c2e0c85eca2e207c42d1a3eb77353f62bdf0a1. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9aefd4b0-b7ab-4240-868b-445f85d7dbfe.json and https://artists.proofprofile.net/proofs/artist/9aefd4b0-b7ab-4240-868b-445f85d7dbfe.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 0xe213ad36ef37c9a1481b17bf3021d3f1853ff173ce57d82abb1a4740b0df68b7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NLE3B1500176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8589a92e4b3c3ec959addd58b5ffdd46502b7c01f643a6fc4cbc7988bc5830d7. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/NLE3B2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c32dd788f782c85402622327ccdbb623214eb4b92407788a3bb8b28ac4e4b1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NLE3B2300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873a3b8562301f40304c6278b2059b47b4e37984da545cb0ff4100ee33fa9fe9. 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/NLE3B2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ce4f19026ec2154a9f3d179592c3dbd79bf3433a888bc15e98f22690f636a4. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/NLE3B2300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7e0c2ff7bbcf037ed3a468aec7a7b30b2160f0fae7bb797970557031ffe872. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLE3B2300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc11bee6c51ad2666d32f289e030368419e90c278d29477ab5f4d65ebfb8cccb. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/NLE3B2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6435f700f54ee5624ddb6d8699fe4ebdcd58ad17149bebccb43aa19ac639939. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/NLE3B2300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1da002c9673a34b18f0821dfd52d8b5f31777a387d5909cf8d712e0b43f023. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/NLE3B2300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d00777f2849562ed72af138f0a9719fce50787d0f3b12411648bc9c3dbba3d2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NLE3B2300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34947d5bdcba26387129d6f864e16c98db71dab2443cb2c2ac9ca9604263656d. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/NLE3B2300051.