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 0xa591d6fddd2a7dc920631598ed83807614ba7a7753a74eba925dba1438492671. 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/4f038eb8-7e53-4aad-8829-b37e94fe3f3a.json and https://artists.proofprofile.net/proofs/artist/4f038eb8-7e53-4aad-8829-b37e94fe3f3a.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 0x62352eac9bdb503f202f879cc2e21eca636440af4bfaeea7944892acae38e192. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/US3DF1920789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6faec75b04c331143a01c1ca2700a1d60c141cdcfecfeed27b2358810a6cdc5a. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/US3DF1920792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc3904639b404bfaf504d0c3ed9ed3559bc6a40d471940661cd6985a2d4d926. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:50:03Z), 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/US3DF1920793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26c553de8a8bea5fa1f9a64232c1c04450d6e81aa8733e6fef0e1f35bc18296. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/US3DF1920794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5de1a751821648de0a12e6ad4f280299a2cce5e6a06f102baab1a0573fedcd. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/US3DF1920797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8c4331de0764abf769230743ea0109756bf4e42dca8f6a92cb591853e21805. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:47:54Z), 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/US3DF1920815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d59e1f19503d2a5705a60bb290128ce2416ca5cb62f62df887d4befaaddce6. 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/US3DF1920818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9647dc2233d1b4b86a32ffdedeb2bcd17c2fdd715ee79c29d8bd5c24929fa1bc. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:28:30Z), 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/US3DF1920918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036929eeff505221e8dbe06678fe6d93418e6ebf6e26345c01097526d330c203. 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/US3DF1920919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6a514b3c4aba58b53d64f5046738eb40bc61fb12b5e1985b6d66ca4433cbd4. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/US3DF1926994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb529c8c96e15264214e90287ccbd6bb6068ddf4f762e6e6ba22a71d410d30f4. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/US3DF1927102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c85482b25ee7331df11bd378e9fbc639b97c6fae7c2c87c5bd96ce79b29718. 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/US3DF1927103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ec8cad165583adae27b79cbe7b7182609f5c2f2fc0c10f34d99de027e3ec12. 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/US3DF1927104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dffa84971bb3bb27bc9248ac47095d788c6adfeab6aab4278975c93981ac1a6. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/US3DF1927106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0174d509610990b5d9806bd12ff0f93cda3c52486e84810b4f33c6ab55211d. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QM3DF2000132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15b2d66b0699b6c704808204010cac8058e0cf270f9bbba4683171f175b66d6. 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/QM3DF2000137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352e72f2c067ef6c20462c56b0bfc50d37c36e122d6216b4c0a0ac805ea2501c. 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/QM3DF2000138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12f6a428f97b0eb2e57cbfdfd876e7cb8d8dfde744c8cc7da2fefc8d3c62819. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM3DF2000841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a54ec69daf66341cc2cf4548a72ba3b9a362132d776a2fbee8f5ce600c78744. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USANG2247488.