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 0x81e1920eb54648f60e74e6ecae48345670cb731421767639f6c46bac7975eddb. 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/5dd2c7e4-97c7-469d-8e94-7aa628a855f7.json and https://artists.proofprofile.net/proofs/artist/5dd2c7e4-97c7-469d-8e94-7aa628a855f7.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 0xdcee39a0af3f7db20dc977760dea6138f0cfd03229d95ed3fb82ccadf40ddf58. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USL4R2449793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6859e4b4bceda057d107094053fe920a8530a38134e6088567923335035815cf. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USL4R2449794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfae3eb737582fd5bb3bf868b54ee7295451809a462d114e91ac74ad7cf8918d. 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/USL4R2449797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee39ed621e94a3dc4ecfe37ea32c2d2decd1cbbc75542669bca7c4abfd81703. 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/USL4R2449801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a8d6e374a21951aa146215ea156790ce88e961f4f218525a1852747338600c. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:26:30Z), 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/USL4Q2413329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e2b3af025302f6b00793e1a2faad08f925a7c63f41f3eebefd92dfabcb309f. 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/USL4Q2413332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd27a1b2af24c98d1b723530f674817cfb10c34bccbb17b1632732f9dc86221. 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/USL4Q2413333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8a265f569c52fab0d09b4713589cd1667154904ba0c69bea9a212550b7532d. 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/USL4Q2413335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b999c65467fd59b33ea96f098f7ebf762e09dd34b5ac7309c3e7b776962e93. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USL4Q2413336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c400283bb415a1e88a41d802fbee418c5ed55708a8082df8414918d19e72f9f. 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/USDY41996357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5656524dd2719827dcd8aa887037cfb3f0136460e156d39fafa9f727c1e6261. 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/USDY41996358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bacf94722613424580f96f528e9824bbd9f3f8353ccf6e0e1b4581793a0375. 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/USDY41996361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca2feb785f3a95d134b2abd6308684faa56dcaccb8f714aa364cf8c643bef4e. 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/USDY41996362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b5a0cfe69f699858ac8d8e5fb366ad1eb7e658d7b13492f4989a3336fd086d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USDY41996363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd61f1999f34c7f1e757b9622043345422f9a41554af9f8d17e0b36d166be26. 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/USDY41996366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6e64413ed45558cdde17570f6ea830d4771cb81ff74a02b19b0605765c32818. 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/CLCC20400870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06aabdd6e1f3e0a83e017b01b2eed76410fd47f73a5e9a6810212f438aaf87b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CLCC20400721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba141eef8806a6c20178860700fef1539ef4cca3cc370a5386f04e74cd515a3. 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/CLCC20400871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3725b60bcad0b5e55560c8258a59ab59f18ee84336734b165a7dc788bebcec. 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/CLCC20400872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32624ed4c234bc149abaaff7a06d7ad7f390cb7ee3d4c27b09fed15660ee2140. 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/CLCC20400873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd597d0438c42c85531751a785f944e5bdacc6a83786810a3a29b217d5c697b. 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/CLCC20400874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5ecda93d1fd3894b8f8af876b64fb5cb44b2c92a9ef256604221d930d83d08. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CLCC20400720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3a2c18c9aecd39f479405388e8eeee96ae07d023b13970353402f90ac42b06. 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/CLCC20400875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc5f84e6ce3dff14246019dc45c1ae282fc5591aac42e5a3860c455c90fa6b8. 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/CLCC20400876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de640850176a0b4a2c9bda563d5ed69bc96c27cab71ebd746d9f6be036b879a. 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/CLCC20400877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836c0cfe88e1385b06f7b5ab3ef749951bf02ac87d029ccb799ca381b93cc2d4. 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/CLCC20400878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926c798c969da6f27390bd2e30128fe3ac377e02db52ebe7293a8c7de050beef. 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/CLCC20400879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b132fffa7498f49fe239a346f89e354014990102db1276ee865f4c440117ba. 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/USCGJ1972364.