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 0x11ebf460811a704b060dfdbfbdc4e6a86b83db610a3f9c9c717a52b3e840cd0f. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51efa283-aa3f-45ed-8a94-63a08b9be90d.json and https://artists.proofprofile.net/proofs/artist/51efa283-aa3f-45ed-8a94-63a08b9be90d.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 0x126c807ef101ad34a20280ad24886a89ce1ed6bddf073f38a984315f7957a41b. 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/TCJPL2079262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8671cb169bc4e7ae3ae2a3123821e1ca6f6bf479c41ad878be61de63c3a3fff. 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/TCJPL2079267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fa8034497511db86738d45a8205b99f069270c253785394f7250492ee0552a. 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/TCJPL2079268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf10d430caabe763a1ccc32a133c7b03256c73772f6f193776eb3b4580603bd. 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/TCJPL2079271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e3e76b851b30261a23a8f5332f2e66d196c0e9d80c6d3db45ef1f3e8f8c9ab. 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/TCJPL2079272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f8a8f8b5b2ebe4f5088b92f2242c6b97d2a61a93df0d110b8654d0fb8b380e. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/TCJPL2079261.
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 0xe389e3cfd3f1433e7cdc30fa582322fff2af046542e34bcf88779d29bf16b4eb. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCJPL2079265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa054d2af64bac34e7972f1dfa22a2716317ccbcda57228f418581e650b497e93. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/TCJPL2079270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde59d171725f789405082422f5cd837d373cc1fc2f307e47ed08278e2c03deb9. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCJPL2079273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8dca1e9b59d6a959470e7694bd53aa8f15b098a925fd1d0d83a3597e2f9341. 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/TCJPL2079298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6618de4770894971329785e05678079040949dbd0df65619b78fb0967db64324. 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/TCJPL2079299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e904abacd3b5452d2cf71d20abe5de8fc64dc67c2816e790aeb4a2997bd51c3. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCJPL2079300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafe68a99d5707d23088de193dbf8e188e21f001ecc4810ad9861064c9a522d2. 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/TCJPL2072306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115c221a19b5b83b5afca86f63d74ad329d78930ba50983dac74385262897d96. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCJPL2072314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e97cb5f2fc1107717625aee561a0b7adf924d3bcf133aa65766f7cac638bafc. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/TCJPL2072318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0b69c12b6698c8397037fb15aded325879692fc2b1ae0b93782c29a685f1a4. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TCJPL2072250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69afe82c8c7158a61dea363c57a9ccba95e9b6d980bf858e97f849156b2c431d. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCJPL2072345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e2cb5359751eefe62874c695000afd348f085da079171b51198270ea21eee0. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/TCJPL2072356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fa6c7406839d857f407f349a01ee434ee56623a59bce6a2b4aeeacb4473621. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCJPL2078230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa871f67c0117167eb796c69325b200e2eb6cfaf2ca1bb37b861aba98a6ac7415. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCJPL2078311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180650d642a72532b4a109c010573c9c36e58ec79d38fe01b0134f05964b952c. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCJPL2078281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674e4135c586de882f40ef84cb5abf12325a5ee2f6c9cf4837474c70fbb40d0c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCJPL2078324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0454bd002f8bfffb425824aeb9b0553f0a666d3e7c536e18449ace99917069. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/TCJPL2078593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe366bfd284bce50e9acffe5f7ca245eaf0e63e864bbf24b3a1073a6baae35987. 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/TCJPL2077722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa638074f52c9a0a877a2ad501d2d643f78fdd01bec1c7c278dbdfd243d75f141. 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/TCJPL2077769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d90c31a8bd94fbb39732321dbf7975d4a4fb1a475130919a7abc167952dea1. 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/TCJPL2077850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f348383b6b91ee4a7e15f3ea11f90db6916bee582b453a923c585ade63663d3. 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/TCJPL2077891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae60cfcbcd52b56aebaaaad8144a82c5593c786f7e5677d7113e75d8f55d8e4. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TCJPL2077630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2b80ca9f8a0dc3eb1652015f8d844505db104500280fc06f65fa8af633e68f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCJPL2077874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04793577be0b945a5760d1acac8a58fb5084dd102c1d7537517b9aacff0c1662. 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/TCJPL2079306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5da89f41aaadfd5335321f4b8f3d8a17eedd5618da097e647968c40473dc02f. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/TCJPL2079304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279a5cc19c7400f01514279313a738de8af53e9cff1e722ba3c2133e46f69a50. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCJPL2079307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3cf763d26d144a8218fd67c45f97eb27825a6c362cc975e988ae4d5cd4d865. 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/TCJPL2079313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f82f4cda2df24ee96e58da459b20cafaa8bf6700aa8ccc32398dbb06e78629. 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/TCJPL2079315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8400b0b92b4a2e9d3fc0ee770021690a8ca49a651269c86c142fdf5d7ef99821. 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/TCJPL2079318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b39624c54d672f0f1fea393722dbc1c411847f0f471baf3d2c82aecd1242470. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCJPL2079316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1feea3106b13a2f573dbf34722398d58ad35060ba209ecc87d237e6be66853. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TCJPL2079319.