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 0xc4e0b927a60dd99ccc45bc3a9ade3965552486ea5210bc27f71855b5f6bb1be5. 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/9cf65ba4-c681-45bd-aa09-c7808fe3a519.json and https://artists.proofprofile.net/proofs/artist/9cf65ba4-c681-45bd-aa09-c7808fe3a519.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 0xcbfd72e854f90ebfa11f4d601302f8dadf9e6c63e2a4e1bd41d34fad9faa08c8. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:46:16Z), 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/QM42K2018087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37fbff0b187fee333a5b8b424686f7cc55739eac4964c11c4c49427132e3d8c2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMHM2060817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6168e07684356744200e2629bee8234f0e0b6e14e401bdc3fb79043df080da. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:04:36Z), 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/QM42K2086240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4615f006d02ffc0c2438723f5fae4775363ef30d4774180340ed6168856e637d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:57:38Z), 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/QM42K2034005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5709a11a332ee4bff22106cbb1dd37bba8413cd9fa68daa0edd05e48025a800f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QM42K2093331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32283de7614429c0c24dc2430aaaf7dec1ce2e4c77f1972a3f76ed1caaeb254d. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:43:38Z), 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/QZS642390607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ec44190b89a74340c48980c384e7e8b7c97ee2ca275bb00e838fcbe0b0d237. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QM42K2328478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425941f5283a549ee4ac41d735f5f45682b7f4af8e805e71a04f66ff9c4cba62. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:17:57Z), 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/QZS662473822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e802437820475eef891f8e0d371f24da6fdfc8cac29a0bf287a4e7cec149679. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:26:36Z), 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/QZH5E2476833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d745f4c9df4ed87f710d1b51ec00874d6dfe5ae515671ce32923d602e5ea20. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:37:57Z), 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/QZH5E2445500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2376b1eec271a1b6513871b8ac3e44179f3b64a92ed39a1ee1cb03ea17fcde9a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMHM2362499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9017e0cfda3dbbb2fa1716a0d5e848197fa88f606ada7a987455a74ca64175. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZS642508747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68ccfded200966847e3b7a7ef4fddc42af5e6eae8061acba1f40aca1dccf676. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZH5E2481591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcfbcd42b8ec08b7611dc5efd62b8ed1a95248fad87e55a462978a41e746877. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZJRB2520725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469f51dde2eacece2fd66aa238fa299f9a2b7b92a869319bb2ee8bfc77b0a668. 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/QM8DG2553425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea2fe92bf883670557dae4af6b8355e57d8c51ee7df9e3995c32b9d8639296f. 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/QM42K2033783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4220a435e1c0356aadc9713a7589f5b85eef0ba36e1957349fa4a1d9a7282084. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZJRB2575198.