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 0x4abd39873fb77d9a1815e51199542d60b0fa5ed673dedcfe468483cd3828161a. 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/e2ffadeb-950c-4099-ae8d-aab611efb06c.json and https://artists.proofprofile.net/proofs/artist/e2ffadeb-950c-4099-ae8d-aab611efb06c.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 0x1d6842f24a6a41a5ce1d5a9900fee260342b8d63f45916d1fb2824b56b70c934. 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/USHM22411381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffb642ec6beb59990f58038be1b5b14d20d6b28c43ec23589c764b1fffe0c39. 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/USHM22411384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f1475c902e31099d163abcaf0608dd9165de6f24e8ee549a4ff4c344c1296f. 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/USL4Q2329258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464af402cc4e3e6735b4c4a6ed01515b16279631bec892a6d52d928f160f6a4d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USL4Q2329259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde69f5d226bcacf592acddc3a24025497368cea93c3a7aa96efff6f5add1e174. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:05:34Z), 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/USL4Q2329260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7b1f1077749f86c7fa023c71d473deb08f08fce6bd11ff35984c607f1f4246. 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/USL4Q2329261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ffb1975f9f54c12aae61f15905703d9201d531644f927c8e070e6777203854. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USL4Q2329262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c35cd8a10c3be717230f3012465db70aa309cc0cbf54be68b768d742a413754. 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/USL4Q2329263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135ef1dea05a3c25ca35ee398387d0a13217225f1e29cdf00967d76defec1fa8. 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/USHM82327515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fa3431eb434b3fca14e0767e894ca3070f4ac331d4f0269b1cf2437ccd1e70. 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/USHM82327516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2199d3b95b2e9592753951e84398816fc01e27261f1af7b7e922173de3309d88. 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/USHM82327436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedb6766438b9259867731280f50b169bc8db2e02334011c295cda7fe390edf7. 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/USHM82327437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67236dfa3e426e955d4d11167d20caebafe4f7887c665572cec9dadab8264442. 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/USHM82291542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6827675ed88182499489d05200236ab1832263af2810c99cfdb6261dfe91c5f3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USHM82291549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacdf017abf281d09a772ff4ee1588db1c80ce8ee369df407daf2b0db28752dd. 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/USL4R2168377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43dabaaea2657a1746b381a2e11c7284a3f67ff9b1be6e525701e984b701b776. 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/USL4Q1945777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f3456b636eca31976dc34a9033c926e9f0d8639e0a0ed0e496e1962023309d. 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/USL4Q1945778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5faaffc148556ca4640644a646d6de4d844cb297ba08513ef38d037996ddda0a. 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/USL4Q1945781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fc9b3fb268c230c2a212612af499332b3fdf84f8e951ae2aabcc80561b4791. 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/USHM22224915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be813f1c5e326ca008d05d5eb67207a02b13510a81c94fdcc507add264955ba. 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/USHM82293117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9667e4912f4ca8ddcb3bec9bf32c0578839a3f496f4ad358688b6c4d4e512a2b. 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/USL4R2090963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f23250536cb192210de429b5e82968f4ca5ea0dfb8dbce618b2f62a69c992e. 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/USL4R2090964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c383ef7a705cbcb52899b8c44cf3112b960d556c4b9ae8e630e2928f898ea3. 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/USL4R2090965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb722e78b10f21ac2cc395a5d47e5fa89442d812002f156039c9792db961f34d2. 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/USL4R2090966.