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 0xb222c38008762ea7c06a81c1d6191ec13196682136249275808c075219c6f4d0. 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/b6c1414d-413d-4ba6-ae45-2381e4c4bc64.json and https://artists.proofprofile.net/proofs/artist/b6c1414d-413d-4ba6-ae45-2381e4c4bc64.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 0x0a7424362f296024f8843d08b6131cc09d562c32ab378d0fceaffb372ebc5a3b. 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/QZES52272238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10240bc832319e8e77998d040acb7bf047c8b1273c5200266727263ce9935065. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:41:39Z), 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/ES5062206601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd214061276598dc833d3b776ac97b1a109f4b3b7eb7651f26ba7bafa65c2ec8. 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/ES5062307901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d13c01d0de7c3e8e177979eea1630ccdaf0b5013d4090d7bb43dbf5a779859. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:01:42Z), 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/ES5062309601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bb5cc07fa743ac55d36a5d56bd1529e1f0c4760063fba0033e73449d25b213. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:06:43Z), 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/ES5062406301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc01b24f8a988086b06b2cc2e3ceba5977ee784701e60bb3db2c30a3b6dfeeb. 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/ES5062411501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cd1f96b671f8097a95aa4d7f9c8eaf8dcd84e96b72a61df6cc14eda132476f. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/ES5062500701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1639cabc20358066abd3572536b085db469b1aa5207b6b46cd28fb375633e81. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:14:48Z), 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/ES5062503201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bb5cc07fa743ac55d36a5d56bd1529e1f0c4760063fba0033e73449d25b213. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ES5062406301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95dbe6fc3fcee3368adb26f5505db5cd1fb398d87808d2989d41847da9eb6119. 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/ES5062503202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4dc8d65a69ae48c3065106e9d7ab5081f2e5ec18356835ab12eebb5a52eaa3. 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/ES5062503203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cd1f96b671f8097a95aa4d7f9c8eaf8dcd84e96b72a61df6cc14eda132476f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ES5062500701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e54349b601d8988743cb8dc86d0446ba1243e91ab46131fd6d460a4b21508d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ES5062503204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82f122dc81e6ad6074889165556982e18061d3a3190da1b012b567049e2d12c. 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/ES5062402801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a713cd1c3c01fb08c6ab8473229ab84add9b650ef81eb09506595b025a91dd. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ES5062503205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8945bc7e6a26c37e6480364b5a334c0fc7fd6bf145d4d8658861c8f177da033d. 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/ES5062400801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc01b24f8a988086b06b2cc2e3ceba5977ee784701e60bb3db2c30a3b6dfeeb. 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/ES5062411501.