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 0x5ac4ac574be57783c8c94cc76a447949892e8810e707fc18b8b11d9b9fc24ddf. 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/ae8c3a35-c6f7-49d3-acd0-9304429db791.json and https://artists.proofprofile.net/proofs/artist/ae8c3a35-c6f7-49d3-acd0-9304429db791.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 0x349cb84749d4d1d99cf508ef56b228133083bfc15933a89698b6ef131f2970a8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWA532200390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b121a8b40ed79d3f45f45c12593be42aa247eaf38066e0f1c38c29e7bca76e. 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/TWA532200391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e836655a6dbb1b29a02b8211d12b63545f257caca742cef2c192b81e4b5b00f. 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/TWA532200393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e597d07895978ef6a58da400399b38aacdbeb3e128f248f9f1d5a1f4bdeb3c1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWA532200395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30f8a8ecc226249ca08d8621992bcde6672c8a271b153b142ca3072147dbc43. 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/TWU712304795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d71cb936b13b6e370d11d811f2b97ecd431af165e1cfb19fdf596435137e9c3. 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/TWA531902092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5476db6553aef759f33644b0777bf74a07ddf2bc7549505a67bdec89c10f2a65. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWA532074704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb285f7689231380ed3a9168fdaa8613becbfff82690567cc9a86e730c2a865. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWA532074705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b13052867132ff0438788d47189971d6b7e2231e8aae97d6894dd82204dbc8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWA532074706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2c9bc1ccc20ab0b96ac9d0cb556451b4a16b616a0ae4a04144a32a7d388e7a. 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/TWA532074707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a7ac3d009ef3d3ba5e22893a7567715606b6793e5adc0b266db313a1eb58f3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWX351800066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bf70d683134e18d17b85c6a51807ea3e056f20ef73cd2fd9f10852aa4ea76c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWX351800067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5ca824e26ec00ff7cfeeab70aa928eb2b2811660e4a8aea87e9e075288811e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWX351800068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd629940ce2d94b40e4f59f05dde6cd15650e9be3cd4f5788f145fd3a2145b3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWX351800069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c8797fdf491687f4200757386afd6fdbb58142c0b75a17bf6b8175e279d812. 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/TWX351800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6631e9e9609e08eb6c940d8e57c925f9feadd6b4b98d08e05297b005a2f08b19. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWX351800071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f6ad85683269778e892eadda0903ec1dac8d80055ca8e2c2398bb032743476. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TWX351800075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053723a654df616ba41b49d1d5bc89735d35b96f1142e3ddf1ce9847cfe171e5. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/CNUM71600033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2856d59a718c8ab271b316ce50dba61c4758a7227217482abd59cfb7323e025. 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/TWX351700051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84a7d021472f8d383fa877584f835daff21d43edc13b521b8b4733634fa8db7. 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/TWX351700087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc511d7e31ccfd5f3debbc656789c9ecd75156acf78fefbdaf27fe228b2dd6c89. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWX351700290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe776692e98bdbd4556efc388883794d3eb761e9231540f23557e2b065e2c61. 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/TWU712500267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf533bb95bd56878fbd665607e4b19a06edb3525ac3a6a11e1901c5be319a2aa. 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/TWU712403907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e975cc64f1d31a74e7c5ef7fb23ba99183a445e9ad70b45b994865e0dca76c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWU712400768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b67312e1a3ee3890b05f4eec4e4ed900ebed569ff0a8f4528f8b2abe509dab. 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/TWA532200435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d8a5c6e1f5c70a3045be8430c8ed799e0dbdd42ca4444d7ac139b35b11c7f2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWA532200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adc5dc2754a0f25d2aca4a19abf4d0a549a3ad5043fecb48f36b176dae30c3c. 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/TWA532101633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd629940ce2d94b40e4f59f05dde6cd15650e9be3cd4f5788f145fd3a2145b3. 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/TWX351800069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b303c98cd9210e62d2efb9165d1623fb42ccc01ea3b9c37e5418d1626e2459. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWX351800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84a7d021472f8d383fa877584f835daff21d43edc13b521b8b4733634fa8db7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWX351700087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2856d59a718c8ab271b316ce50dba61c4758a7227217482abd59cfb7323e025. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWX351700051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053723a654df616ba41b49d1d5bc89735d35b96f1142e3ddf1ce9847cfe171e5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CNUM71600033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0c86d82b216dbefa533410d53ee79ff5b9363e39dc363a0d38d81b0a5c0bf3. 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/TWA210520506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fe1f2a07b874d8aadba7e75d3d74cac02bbcd38ad678b4a6bcdd1072d63825. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWZ551410010.