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 0x1bb241f1224159f7a9905eca4d448933450d704613d4fc16d61edc46984f199c. 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/5012cd9d-de12-442f-ab17-8ab363c6cbae.json and https://artists.proofprofile.net/proofs/artist/5012cd9d-de12-442f-ab17-8ab363c6cbae.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 0xc25edc91f6e72ac76c88d8921d080d10bb2dd8ceef854fea6ac3135c1599b949. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ART0G1204917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43dd0e407f0249bd613cb5f2f5f3efb405df6b2f2409d01ffe2188a8b6f185c3. 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/ART0G1204918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134224d1a8316533732c552d08a9ee1543482442680d0613f17fd1d540c6bfd8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ART0G1204921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd956ab3ded422492f9d60262e430cc8b8fa05321c9de3fe5f114d2d4663cfae4. 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/ART0G1204922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4197c2a610df22a1b0101fe5ee3a74519beb7de7d560384df768bda22125c4d. 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/ART0G1204923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57fccdf09d360a9b9cce3241e4ff395557cc47457401380aecedaa2b629973a. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ART0G1204924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb320c946c6d87f24b467773e3e291e152f5f2394d18e359cca2825e017c3ca9e. 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/ART0G1204927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde19e485f10a718fdee9d53bfce4e53f83427eb78986f361bc8c3536c59331d3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ART0G1204928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff79297631eeaad0a9d8f5bdc82204088f4dfc1d5511cc507f6865c439fc8180. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/ART0G1204920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6c87dd27e1559ac39e5fb3cb547c3da5271749686544add43a835373f22612. 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/ART0G1204907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d80f4e982b46fff2b8af122d3281ed1fd0db073c661f01b57046315b44b4d18. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/ART0G1204910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ae9dee3545ffe75e1009e2a2b6d527a3ad2a0be1eeb764e124c80f8c67e517. 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/ART0G1204911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dabf1e05e673f785e5a0b7d436cf8d3bc696ff822753098cd9ff17d23d1c8f7. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/ART0G1204912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702b156d4be0f869b00a106b850e466531a09d5c945ddf7c7371602903327c7e. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/ART0G1204913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8f71ff25c65a020fe2b97bca734c8a61b55686abc894a1e4f9d0708cbb5dd3. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/ART0G1204914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7053fbb26f4e06c5b877cf8af6ac1c7180686708957abf356b96b52d41a5964f. 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/ART0G1204915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dabf1e05e673f785e5a0b7d436cf8d3bc696ff822753098cd9ff17d23d1c8f7. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/ART0G1204912.