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 0x4c74fe0b4f55f394f9aaff266ffba87fd607e5aa17a93ddd87680c0f672112fb. 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/481eb36e-3ba8-4058-acf4-7f3800ca4d9c.json and https://artists.proofprofile.net/proofs/artist/481eb36e-3ba8-4058-acf4-7f3800ca4d9c.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 0x68af438b200e1848e15d6eadc0c75ae28f2c66e95d77fbb03f129ac652e801e8. 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/NLCK41045809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84082a12fc6e419f4944c3195af84d672c2728705c8d8a3f9ddfece3c436d08e. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/DEMM41801456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef20d65aa2f9c4ebdfff2c951f31e691f63e396b6678c46819942cdaf7d1b370. 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/DEMM41801457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74dafdd90e70705e84fc94a841f5e63affd33981641fee1ebfb8b280979e2161. 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/UKRXP1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0529f84a082b6b9ad767385c32ce004676a362aa3833e13b9304505cdd9d9bd. 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/UKRXP1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d4df4ff861a2663af8371ab9e0e29d7a15d8cff1776dcc58eccbdc68e605b8. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/NLCK41072476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97b21eca1b462b56f0ac293822136d970be793bab30ef724b8719dfe7766ed4. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NLCK41072479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a06a5c12c22946c979cd1dc63dcb7651aaecba422349a345457583ed9d1e5b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/UKRXP2100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fc7af7737600c8fa6a6617493f1c68451251aa0fce0a9acf58d9adb590b736. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/UKRXP2100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a06a5c12c22946c979cd1dc63dcb7651aaecba422349a345457583ed9d1e5b. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:43:30Z), 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/UKRXP2100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506bfcefb994d1c8451311439d4b420d64fb2f55a4f6a250f83769698486138e. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/UKRXP2100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88065694dec4d818192957bbe90999b38241dea3a742e539c899d7df44cb7bfd. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/NLCK42400272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7350eac863102aaa325f3805759fc90d6a27c0030840263891b5dc2c16e3c2. 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/NLCK42400273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7350eac863102aaa325f3805759fc90d6a27c0030840263891b5dc2c16e3c2. 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/NLCK42400273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46d2510a60b6a679d92d060de902f19050e2c11e8827b831496175393cc5c36. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/UKRXP2400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5503c11c3a3cc3e9d901ea75608d1b93b0757e54b7f6afb8860c4825b4f6d109. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:40:52Z), 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/UKRXP2400053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdd5e94f745c8e7546851ee2106e17caff020875275638de3ed65bf7a5b002d. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/UKRXP2400055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050f9d8c7ff2169e7114f5f94a5dcfbb20d3b9d3676837088ed228e64126ac79. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:58:58Z), 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/UKRXP2400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfc49c0e5f35d785bb915e8a8031eafd00369772dfdf3b232b9e14668f77b11. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:05:41Z), 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/UKRXP2400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5bf77eca60b9394d99ecb9a7415ed4d5319685df30d1c088c15ef7240078fc. 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/UKRXP2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dcb9feec10098d5728b01f3c8c5e5c790789d6059e9c1733e881d195ff6ff4. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/UKRXP2400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112714a2ed6ae8d76baef1b0ae2757bdfbea9f75ed4acb810bb131910e2e4f4b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:57:12Z), 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/NLCK42501502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a2329945985ee952003909b9e8f613c75a7e2a896a82bacfa4cf50e9865305. 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/NLCK42501503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24095d845a1975553e21aa0117395ece268d7f8e6881dbcf2083040dbee4d3c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLCK42501504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01faa8cc19c331445aaa47ee00a5639840acbbaec422be377cdc2173131b32a9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLCK41064615.
Mixmag Presents Charlotte de Witte (DJ Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0abf655347caaa863b4124b697cb16d7883adc4154b7a5a525eb7d056949eaa. 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/QMFME2133260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc403326ca276f81aae095910d74b25b6948b21d1f59530265ba8630b86fe8353. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKXYD2000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23145c4c577ee2e815b26fae35cddd8fce86a262220eff7a3419093f751f95a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEH742302368.
REBUILD - Earthquake Fundraiser Compilation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e7046469b66c10c6e87fbe0b9df90e32fe5c768b99126cf4657e269da91f0c. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/GBKQU2334844.
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