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 0x296227a4d5ea0cc3b4650df885da435ab912c1b5e43c61dc41463cb4e5a435f2. 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/e7493112-0347-4686-a752-e3239d0dd7b9.json and https://artists.proofprofile.net/proofs/artist/e7493112-0347-4686-a752-e3239d0dd7b9.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 0xe4bf0dc2556e176865d4e729d0ad8918b8ceee390a4db99dfdb979db6d3f1a10. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/ES31E2102149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7074cd35e6e7cc434a71d6b5c02c632309e94e8570d3a2a7385b0ae8534ccc46. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ES31E2102530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb283098804ef1d6ce33d3dc4d0149b53c6cdb3cb1f42c354a6c38f0b3b15a45b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ES31E2201264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965e9309c046215446cf006697c5ff8763ff766e19ce99bae3fefddfeed41d77. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/ES31E2202305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2f44e9fb12c8c361a3b506bb7d40137a16a7df2ef726a709ac08772d0599fd. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/ES31E2401621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307ffa596a80acc744975bd08b52d20b3e0ee5e4377200590fdbfd7a2e294d60. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:20:09Z), 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/ES31E2413695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bf0dc2556e176865d4e729d0ad8918b8ceee390a4db99dfdb979db6d3f1a10. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:01:28Z), 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/ES31E2102149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7074cd35e6e7cc434a71d6b5c02c632309e94e8570d3a2a7385b0ae8534ccc46. 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/ES31E2102530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d24ebd80275fffae8c81f67e28a16da79ef8b8fa1ce08926593dfdd58a213e4. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/ES31E2205665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb283098804ef1d6ce33d3dc4d0149b53c6cdb3cb1f42c354a6c38f0b3b15a45b. 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/ES31E2201264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc290d47be7c7cda31d84a74908aa08f377c117c1df9cd91e50d4d85ac5bc4f56. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:52:14Z), 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/ES31E2513698.