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 0x511457ad46838b28c97d831cb8e3cfbb30ff17a9f51dd1bc035016eff3b9bed3. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/afed7f37-85e2-43cf-822d-1229aeb89d35.json and https://artists.proofprofile.net/proofs/artist/afed7f37-85e2-43cf-822d-1229aeb89d35.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 0x1f62d884e12066112e9d340b352e70c634dfe28ec137b4e9feabb48e9515c2b4. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZDA62350026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea490969c383be1b979cf428327f1d2acd9911d94c64afe74742c31e4ce64db. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZK6Q2400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f24409e17e68bf016411728ade4ecb16fef0a77c33699d929225298f7c612d. 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/QZK6Q2400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e6bd612f8b2d8d30087a4b4c4466328bde97c31ae6c7e0718e68cc4207940e. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZDA62428965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551be1fb355a69ba35cabef5098db40c00af9a63fc12b5189fa8eda61dd3a730. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHNA2444390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4467349eed6247c154b21009af8c5edefb176af2e348b49278d6c0a6ab7e04. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QZK6Q2400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40110915c8ccc65b3dd27c8121bb3549f97cf1ab2535f47ee1c21f7b012f1dec. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6Q2400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc730db30cca0b59357b629b6d95a333f844c9d05f42bc62f6c1ab1188bbad6c9. 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/QZHN32403389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939d57d114f02917753d98907ea75b8fed5175adb948543a30bd2501af6bc87f. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZK6Q2400109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ec6b653842f2f44bd8c6c4182912a52fb95def88161e793d1bdaab324785e5. 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/QZK6Q2400110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec53e1d0105ffbbc84763f03083959c84868c91191f90ad9e6e63e18d09ab59d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6Q2400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc225a42010cdb9bd709acea39d972d6ff20d99448c074f44f277f34c9d066f2c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6Q2400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a555f0e71218e55c1bdf6f88482f1210dc11cb04bdbc5e6d8397bde02e9142. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6Q2400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffa882a0c772a1052e2cce79f54e70dd20252f60efad5d722e374510795c621. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZK6Q2400115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38a4cb7b8eb14c78475337c35093d15aafbf8e5323112c3552ab4aa93bfad3f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZK6Q2400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b109a3b75faec01a638cddd25a1950a1124bdd235e6ab455f02bae04b692cb1. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZK6Q2400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c508a798e2d5ed8d994dcd5881bf7be55da06805d204c1f86f65e6758544104. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZK6Q2400118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9102502daea09d52aaf7fb6516574edbd2c29f161465bb4ac93d4951b6d64e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZTAZ2368961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09d64ac802fe3f1ea8803860ed2f23e611225fa6be9001efa6f04e332fa82ec. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZES71989959.