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 0x989be8dec974dc40822fa234300e8e288b3a6c3b984b40046ee53e38c331b3b9. 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/d9f6e15e-edb6-4c6d-987e-fc1a5d734686.json and https://artists.proofprofile.net/proofs/artist/d9f6e15e-edb6-4c6d-987e-fc1a5d734686.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 0x033e00cf3d634e047a60170ea044e7451328fa4a3b266adf31c9fe267e910b18. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/IL1012402190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d79227fd7e5a9d659648d94dbcdb7f955afd5425058b22c06ff47f5bf82fa4. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:01:43Z), 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/IL1012402191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b3f20de02ee9b139a0eecfc4da5b811500d84df98a8e021acf0ada2d18f9cc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:32:06Z), 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/IL1012501998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526e1e49088806a5a41dc218c6a7f3e19d9cd846682e28eeafdf0ce0677e0c6f. 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/IL4642100322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771471bcb4a9618b18f4149f205b79d9cfdbc247b6f5ca26c356ba35bbfedb3c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR96X2024136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34693134356ac482cd97e2f7f5c8fa31ab82e8be6c0929cf9a7e5d6f11f576a3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IL4642100319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc14c205824ebb6bb3ee2954ba266bf18a91c8a8711f2d3be5fb542f459d4ad73. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR26V2026746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5128019d7fd7d38c5a226e6ef144938de64c0a005f62b3ae49afabc6078498bf. 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/IL4642100320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771471bcb4a9618b18f4149f205b79d9cfdbc247b6f5ca26c356ba35bbfedb3c. 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/FR96X2024136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8ca7695fa2582266c2803958f7ce813ac008000357b72cf988bfd3d1e5b699. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/IL4642100321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe5d1ac4ec3ed6250deb72d072abb4047763bd85402add680b7da047998c30f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IL7192100076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526e1e49088806a5a41dc218c6a7f3e19d9cd846682e28eeafdf0ce0677e0c6f. 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/IL4642100322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60acc0445f940628292f70a4b7bd9b58d9759634dcb242ac630e3f4c3c449df. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/IL4642100323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf61e75f1a1671d744ba79b79366089976b9f825b64a64fae09fe6efc446ffd0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IL4642100325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc83ef780c6ceae53ed99182dbb36f68b801ea856398bb18823d1a8895516a5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/IL4642100326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ea2a6261fc667a050785b9d185f3386c9fdd20128e9492075fa11bef626816. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/IL4642100324.
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 0x8ee173e385876daef90ee951a298836e94cdeaeda3ddda9e1ad5b5cb2a2f7aa8. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/IL4642100328.