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 0x60331830d6f93f0f74ab9461e32693b7534647a56a0ff9937c6d1fb647e8e28a. 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/6dce24bd-abec-4f15-99b3-34dfd33a9cda.json and https://artists.proofprofile.net/proofs/artist/6dce24bd-abec-4f15-99b3-34dfd33a9cda.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 0xa27a6d18db1fcdda33957e06ce8d9354ae60bf5b2dc353713de70a1e429dda3b. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BGA671727301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160355e6876fd594cceef8387bf2328b1ccc8c5da3a8bb36fdaaa7fd7fcdf36c. 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/BGA671727309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8ea8cc30131335784a8bbfd9b521ae2e849391933b964df50082c4b1459d1f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BGA671727310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27a6d18db1fcdda33957e06ce8d9354ae60bf5b2dc353713de70a1e429dda3b. 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/BGA671727301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb771b990df8206d7a5d947fb3afd7583c1e0e9557982af7c67cc34d58fabcf. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BGA671727302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bf9ae123cf034783ad2c06ecbea10f20b5dd80eea5388f4c3f60b7f042ea3f. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/BGA671727303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbd62ad355df0020bffb1146bce59d01901e454fdf482f168c3455b69510a65. 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/BGA671727304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7171b9c23ca84242a76b7d5851b0d71ad309ffecb1c42242a0d61829ab998381. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/BGA671727305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88ac64015ff36238a63be0a05a9c44c1caa2b76d62662ba6446da184c64b979. 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/BGA671727306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc38bc41b71e9d6f2b17d60088ff7b4e6554d70bb691dd37ce97bf9133e6cfb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BGA671727307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537243a7d15c4be8605e5788887eb8848b7791286cc55df2640054f466c96dc3. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/BGA671727308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160355e6876fd594cceef8387bf2328b1ccc8c5da3a8bb36fdaaa7fd7fcdf36c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BGA671727309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8ea8cc30131335784a8bbfd9b521ae2e849391933b964df50082c4b1459d1f. 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/BGA671727310.