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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d9f79cac92e5cf741f337d46c949776c7dfccb4da7b482f01440e5bf0092cf. 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/a946886d-dbe8-47b6-8659-86c82e6d9214.json and https://artists.proofprofile.net/proofs/artist/a946886d-dbe8-47b6-8659-86c82e6d9214.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ac18b60cc03d648ba0714d5f175cf4f5020d458f0fb37f627d3350e6557b89. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USGX21110002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b79d62a49372155fcbfbd35021d0005e06025cf4eb0865521e82e77e1ececf6. 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/USGX21110003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d631e8281fcc6f1b7510f0c64083854b165c5e88ddf58818f1652cada8e5ae. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USGX21110005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8e8fe921343bc68d08d494eced3752eb59893838e19caa47a37c163c714e7f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USGX21110006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9709e98b544a39500b04800e013bf42102ff35f3240c88c3f6ce5b0b6038e99e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USGXP1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8e52abcc539db791f75089cb5ea4ef5f2a12e9916e556e827de6329b2293df. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USGXP1200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d49d570519506f9ea98ccb04b1c0ae66a7dc872f9a15c7465f0631df4f8e56. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/USGXP1200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3064fdfab83cc6bba9d8e2a3d4315b8ca53c33e08bfde241608bd1f72dd0cfc6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USGXP1200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b9a49d3da777555583575769db3c866c5fbd1762759d81755df1ba043faa53. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USGXP1200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2da43c38dc901253ce3238ad4a608b6542a06958a0b7447f170ed0402e2f08. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZEQU1900277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e762b342ed01ec65ab1edfa676a267073d3a125fe1c5e0b905964879cabd3f. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZEQU1900278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3466ff2379459c73603000d7447c1928e38a1b93a9c2628dd564e7254e3443f0. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZEQU1900279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93013318a60b7f959289d3d0a0051f8dd6e0cd32d63d2c3765e703cc2881080f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZEQU1900280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38b4b2c9aba8000dab7a386631220dcb4b43ca45ce97c6ba7e6fab182555746. 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/QZEQU1900281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19462d055a4c5c4c4ba5a4ca6d2fd5c8923c5304700f509e3234d28a9dd7d78. 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/AUMTB2000146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723c57f05c5a23ba98cfeec8e429c1a0a581a64eb08fb6ace933c9e273299866. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/AUMTB2000381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61eb4e76739efa73578d7ec49b4c0a084b05f5d5c7b873d9f11cfc906b4ccbbd. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/ITG272401027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14270cf7c0061762a7370511f9e4ebd005601e57cf8ca20cf9250f884b693df1. 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/ITG272500580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2d6b367a60166cf9af3314736d9beeb55189623fc68289708f31ab723dbed0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ITG272500582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260a7a12837f0821d1aa52e9cf6a5b6fa590f8c1634011072e03dcce5e5944a5. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/ITG272500584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42713c192d987f07c1b68f0d6f6ae59358bb2b58ac4d4e6aaa1b304eeedca6f. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ITG272500585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260a7a12837f0821d1aa52e9cf6a5b6fa590f8c1634011072e03dcce5e5944a5. 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/ITG272500584.