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 0xa9f180cd6de7404db1981c44e1a9792dd4f3ae14559e494359ddbd69e9f0b870. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c70142c1-afc1-4d7d-be06-0d7d9e1d2100.json and https://artists.proofprofile.net/proofs/artist/c70142c1-afc1-4d7d-be06-0d7d9e1d2100.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 0x91a9d7b979200006ecaedd118848423d39d20cd91f8f89770b20d8219abbf209. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TR0170500318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd475b261cb038f7b7a65fcde53568c9037996814c361351c7fa9f41654dd6f48. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/TR0170500314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bfef7ebec7178601eca2a98a05d2551595a261d0cf7111307c6d69b3beae76. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TR0170500323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c079cc9fc318c9ae47f7d7935cf285162c3e1284249045efbf9c757a07711f1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:07:14Z), 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/TR0170500324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed97a943bde7ad60f38ab601dd43c90d2fc72632477fdd7705874c233830eff6. 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/TR0170500333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b09d1a76b8647287d6a946839d248266d8235bd14237b4c08f8e69d8ad92a68. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TR0170500329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6ae04fb5f4b6443e644c6f2d74e9e68c1f5228b1c68c8b0af3fe740f3a4734. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:23:01Z), 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/TR0170500339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd977b6ab2b86009f43c9dd4b83aa0fd2aa2e30d3903d4700a7f555ed0106daa1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TR2081500281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec4300b18d49bd417199355d88ad37d28abcfd15e7cc172b3511fd0ed9e38a1. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TR0171701478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1df996ac4091b4e92cc38721d59fc1cc539d3dd464e1b21ab3b4636642f118e. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/TR0171701475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd19dc7c6e42e9cad6149d2e775940ff1348d05a5a4eea96c979e0659336a1b4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TR0172400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dd7cd6daf87a9f3c2088c436a33bc0aa1ccc9de98b06997b9959aff8a23343. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TR0390600215.