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 0xef824ea45065feff451830456ccae4c9bd2693f46ca4e4b84aaeff0dd9c51d1d. 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/048b2a04-56ad-48ce-89bb-fc6feb9fc248.json and https://artists.proofprofile.net/proofs/artist/048b2a04-56ad-48ce-89bb-fc6feb9fc248.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 0x38ccfd908bd4a0840783b4880d6bfc284e458c3ac1a72daac23265eeef9ee6e9. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:51:26Z), 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/DEEC31810148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce7dfb9e51c166c1f02fbd537ee854933ee62d8c731071b57caf674925f0898. 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/DEEC33500384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb667268823fbbad79652c68d167dbedaa01d1b29fcc130c46adea7b39bc71c0b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEM092100019.
Frankey & Sandrino and Aera present: Applied Histories
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82197ecfa436efde81bc98d09453999c00fb6ffb759fbcf50bcc2a80d77bb0dc. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEEC31810442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f76cc66f83c84c77b52f6a34ff2b9f058aa6008c1a36c915f645002387db32. 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/DEEC31810530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161e542e6cbf89c9893649a761ea66785e56871e3a4e457cc7a00728510322b2. 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/DEEC31810531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f28d0044407961e491c65c2d82fefa26e1edb8fbf000f58781c52818a3c540. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEEC33501753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03727b74888ab77819d61d358579021d880960e665c4a3d1d8dbf1fcd2081657. 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/GBEXH2200220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f72419605ba64e0b08bd6b6baca959dd8ad38d0cf0daa48efc8a4d30c7ec1ae. 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/DEEC31810350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9172d917086d513910c2a9cc3547ce6ebfa572f4b4c1e5dc453028176e1cb82c. 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/DEEC31810340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb667268823fbbad79652c68d167dbedaa01d1b29fcc130c46adea7b39bc71c0b. 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/DEM092100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcc656ecd3b312987287937871767bb94a967682815133dba5374824eeee132. 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/DEU672100933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e48b17d722f48970feb295818b2c58d60125ff9512459a68966b479124a439. 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/DEZD82000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2b5ecec45dd4455abf1ee66a7192a8eb6f1ecc506b1ecf712485c21feddbed. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEU672301423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9172d917086d513910c2a9cc3547ce6ebfa572f4b4c1e5dc453028176e1cb82c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEEC31810340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0489d04d9d5617213f4fa9e98aff4408491ab6a341b5c5a0726c86266cebbe52. 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/DEG931912757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07680a3e5c02539c492ee2e2dd9b4498d3f9c0665778614daee7ed2e33121d47. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/UK9AV2200356.
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