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 0x153277e28b9a37276580284fefadab00538d0cb100795fee2898eaf1e467db6e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/202cd42d-c669-4b2c-97d3-66962a93402a.json and https://artists.proofprofile.net/proofs/artist/202cd42d-c669-4b2c-97d3-66962a93402a.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 0x00c97be7bdcc7c2d9029c8a6a8ca59a170591a9a037659a33d79bec9bc809195. 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/CH7811928943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a989eb5d4e290f0f3a754f3243ff65ceff2ec99f1d55c598c3e55670a8ffa4a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH7811930654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e3b53b53000f19267975d31868f1bf6ac99e34dd30bb2795c6a740ac30dd4a. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:16:42Z), 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/CH7812069417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3993cd3ed405ca6d62f94908d0facf573db0aefabebf2674b2df68a22ddd9c28. 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/CH7812176517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7169cf0832308d7c17e97fe5196d7f823a41f4a4e977e2993ec84f0ad917f4. 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/DGA072144211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d20165340693882882c7f3920a60f2bf269c14067c402bf587760ba112fdff9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CH7812197368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e46ebd8e5e8425aaf3cba981ebf436b11270ec4943018e451ad50a3a78864d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CH7812214596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30987141bf9fec23702a5b1f1479c150ba761d6ec2aab13954550f4414fdd4db. 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/DEUM72202116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf6a27c0c6a174d1bd6b34d86d10d892bf206f7b7c98916ed694180d615f06b. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/DEUM72203351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0b8affb06c1384d3e0daff8dc675cb1a1e8a51d22dbc9712f43e74ee8e3dfb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DE1I32400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30987141bf9fec23702a5b1f1479c150ba761d6ec2aab13954550f4414fdd4db. 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/DEUM72202116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0b8affb06c1384d3e0daff8dc675cb1a1e8a51d22dbc9712f43e74ee8e3dfb. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DE1I32400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c270114817f0edd20b22922918784507a5a77be81b7d9e28524fd09502fdf2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DE1I32400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c270114817f0edd20b22922918784507a5a77be81b7d9e28524fd09502fdf2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DE1I32400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c18097801e883faf9f0d2cf5cdd8ed8cec8a333d655a55a691bc7f1aae6f329. 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/DGA072308964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c18097801e883faf9f0d2cf5cdd8ed8cec8a333d655a55a691bc7f1aae6f329. 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/DGA072308964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde853894165e0b5012240b5b9ce89acfc1de50801b13f04a8d1cb9fdb30efcd. 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/DEE862302153.