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 0x7c791f3a5399d12400748935eb397b9a6eadc49a86bb6e250aafa70e30c86177. 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/71598b0e-481e-4621-86b4-eb5d30351cdd.json and https://artists.proofprofile.net/proofs/artist/71598b0e-481e-4621-86b4-eb5d30351cdd.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 0xe658b25accf8553baa69e3c5c45c3f249224a1929d87e87453428901ae86f428. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USA560439652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0a89226949dc4bd246ec26a7d7598cc3266281008de2757f23e2fe4d713d34. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USA560439661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173ba1e21f5b3b151c3841f4a59c8dfebffc4f42986de84c5f496e88563dbd32. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZQMH2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9f243c9545e39c57035588f2d8dbbff4c2c29ed7f4ad45cb03229b80dd8534. 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/QZQMH2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173ba1e21f5b3b151c3841f4a59c8dfebffc4f42986de84c5f496e88563dbd32. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZQMH2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df6c93bb3df9f3de59cf581b3d34764d1498c9d5dba2b873cb409fad1ea7755. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZQMH2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe437cc921ce99dd8dba0aac7e9d92653eeba906fcfee389bec8bfc640ccfdf69. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZQMH2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9930c475d042fb304b5dcd7aac9b454bfc6ff3e4f3edfc878875c1938f0e9b5c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZQMH2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573f9593a6f51382517d445a57e361b1093ca381d8185aa62fad7b8f7ff9578a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZQMH2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe848b3fb7b83a903241bfb0279db7040c4320324af21b2cf52c846773801869. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZQMH2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e60e484a55b27498574671fcb05e060650583a52b10814bdbf082c593db9bdd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZQMH2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b05e0c8b1c17976e85324886037f459119111b6a029eaefc57d80611b72c199. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZQMH2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4834d0af51dc6ac7c7b8cc1ea4bde80dde99ff838653314436deb88c7dcd3c8. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZQMH2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc168fd90824ff9e29212f05242e4340d321b9e8c0f01a77e0a65b9874a203ccd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZQMH2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6bd79f5a10d491665ceba11826204c69a639acf5ac7f1d3c5e728c99f91619. 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/QZVM32200095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad58c8aba5467767dcd4853c72eaa7ec08a0a8b90c766a4fb44aed6d1b6399b5. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZVM32200098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e8ec64b1dc806026f09b29149763073468ac553e542ca5f533f0a0f3b1b173. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA2P2328120.
Silicon Valley (Music from the HBO Original Series)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1761e6b32aedb48f714e88325e75ddcfed5aeb668e187b125a5f066efa5247. 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/QM8RL1400448.