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 0xa7679c2b36a26a74b339b0373f88fb79ec1279f767073dd54bc2b1036ad45590. 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/c6f5037e-40ad-422c-99e0-3d9a92f64866.json and https://artists.proofprofile.net/proofs/artist/c6f5037e-40ad-422c-99e0-3d9a92f64866.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 0xa7d42e9d8d217b3d8774bc315b23b0ddbd3874bc40b0bc5b4f1588a0838f395a. 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/FRX872169466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd346d7ecf808ff4d5f14b295703e33e11b031c6fabbd12b495573ab073613a12. 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/TRUM72200755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7155e57b9baa2065e68ce6d30ea1bf11b1188543844f7d4c1caf145070bf895. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/TRUM72200837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6382c394c4d16c1c9f38a3c81fd21bde6f64593192ef9d8d09342ebe75af9e. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/TRUM72300345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f75b77b3cdb8bd50148c121a341a35dce17dba28c57c79d402902af7429308. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/EEHU32400413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573d64561704a901228b985a1417e80b249555c62ab8bb6401c45aba24d7ccb1. 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/EEHU32400415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fb81815cfdfd8322c86de78eabbaa4d7aa600deec05d505c4f42b2738e93c2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/EEHU32400416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f614af732669a8d01a7e11867fd90a2e38bf13cfc67db2470da0e0486e1004b. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/UKEX32515053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efc34a78ee11b01d22e3d2d1f1a19c31ea87fbef55c8e8eefa2f9d20abe5a3b. 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/FRX762205389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e8fae180082c93771f6ab030731287692372fd6093bbaae6b8d39ba305dac0. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZPEW2289701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cac166478c744cf8f32cbcdd28206f982b1e5f9e68bba70576476ac02be2a56. 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/TRUM72200801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a66ac82af83b93473790af75aa7b0419bc404401c157c06bf41bbcf3dc3be7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TRUM72300686.