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 0x4ec0800b02cb0b9b500169646d5635ed3863ac466fe759493df66a3211faca9d. 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/07dd077a-5570-41a7-9303-3947d587dd32.json and https://artists.proofprofile.net/proofs/artist/07dd077a-5570-41a7-9303-3947d587dd32.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 0xcb1bed8a35525c6dc30b029c9ba5ed754bfd795e12b42b80b34a123ab5d277d6. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/SEYOK1421543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8c1e7cd7711bd10dfd300da0c076760c3d23d82646d3b3162fbe996e412c4e. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/SEYOK1421544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94524929c99a466b70fac94e8614dced97bda8bb7f0a6aaccb215097e10b70d0. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/SEYOK1421546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664c36fa3086c8e96178a80c7d1c1be4ee0d0f8da35a244d311cb90405a21b1d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/SEYOK1710827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadaa45f9c9455e76fda6d9b5723509981e5bce8423fdfbb813a8e90d35a4ed5. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/SEYOK1710828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe16e8fa2a8ed45c231471658e8a7b059659561fbcc0add471d77cd8858dd06f. 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/SEYOK1710829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932ef758763db9833a3f15f42a0aa2d9268e8067cc5e1407cdcc1ecf7e66592d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/SEYOK1710834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05033277eff7fcf569280d878f883b0683dfc3bbf0d5d7d6eee71dd98e2a5bfa. 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/SEYOK1710835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed86b44f73ea332885ab029706ca170aaf17820164dcfcb820a1396fb43a0eb3. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/SEYOK1710840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8d743c0c5a8aae2ebc5945f3743e8cdbabc7595ccdb4461f8e0ff9d05fa075. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/SEYOK1710841.
Live: Last Show (Live in Boston, June 2018)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d50fde1b5c0e87177737952b48766e148a3848e372dd5d447935d854cdeaf4b. 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/QZNWW2118119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b09b1fe3e5dea9c901c8ff55ad08121054bd4def56506e3e939aa50eec8f031. 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/QZNWW2118120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4647e9868eb52804207e46a58588357f507d95474dc90073153aa107f74d85. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZNWW2118121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044910c6265c7f242baf4e9665a560546d4e473e63a7b2f40684c0b6485f166e. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QZNWW2118122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37b0c780404f571ddc6b326d60ab4c323b99111555ccecda88824ef3ecc3502. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNWW2118123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c27f5632f5016124be7fd0e71839eac7dfbe49e5a6a710f0c7a308cb6553304. 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/QZNWW2118124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d06fcb3bac3de3981f5b7e035c49c41c00e6f9036944f48ddea4a5f4e8d2c24. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWW2118125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce70c6cdd068f40b97380ff1100e07d1e04b9ab45f123341d6142866b48de79. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZNWW2118126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8045ceb3eef3abbe60806ab01e594bda7a6d39ec852fc57bc1f797d435eda6fc. 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/QZNWW2118127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6439f8694e02e6b5d66f0b27a01a57bcacfe61c74e5c3ad912dea75339778352. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZNWW2118128.