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 0x192e849dba0b8d28a4ef5b49186c58c2ff8e405427502cb79ed21e46cb351621. 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/9b627e34-6701-46b3-ae2f-a812adf9c6b7.json and https://artists.proofprofile.net/proofs/artist/9b627e34-6701-46b3-ae2f-a812adf9c6b7.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 0xcb0377465a1d51e7cd5722adf48a47e8725a38daa8730b8ad0046ae1d4f7a54b. 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/DEXN92265977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02d565ca65f62d610e3d50e64700ca58a5ef3b2ad1220b0b575cb2fbd2663d5. 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/DEXN92265978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f42be8a560079485768446eab380a17ae73e627e52be9f94902644f144c215a. 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/DEXN92265979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f4bf2e2a4523b260a2df1c0a4c7d2530086a739e3895211048e5208a200c60. 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/DEXN92265980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2a8e9a32562beedb4a104d3d9e5c8f7d33162a3b62001d34a50b64edf13fa8. 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/DEXN92265981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5358a0592e3476a0db8992a6e97d83421f352697158a136b82013a070d8e8286. 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/DEXN92265982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43f46b4b39c076a81de00c72ab281ccc3a3a329e8e7fe6e34bc6250dde0f69e. 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/DEXN92265983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d76f09d0de8c7ec202e0301447a4c69a745526e138bea7a1814c1acbbc65caa. 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/DEXN92265984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd6913988de7f106f277d2ef630f35b210bb9fa10a9e452119b87cb95ee4666. 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/DEXN92265987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31af6b6de9c069e5fdf56294229c734bba815894ef2b1c33b3f997dc2b05fe7d. 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/DEXN92265989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90c63109a5def392e5f2559619ee8ddb75bc257282b54118b0946316b2e088e. 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/DEXN92265990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bca822e201b87908d28dff616f86ba032688f8df84feca4ae7a1e8f47abad05. 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/DEXN92265991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf36b7eebdcbeb007a05d063b58caf302d0ed800909e192ddb970e71893ad14. 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/DEXN92265992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc81fe66ceccf00b2b2360c06953b473a0692e9a4c8ce170a153daf246b350fd. 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/DEXN92266003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0143ef18184060193980f86fe2361c623b8b3a67ef9d2d94e5be4d0a0d50cbf. 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/DEXN92266004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24f64a0f53beb4a78d380c8716af6ccacc12fe364726c6d74c9edfd2b0ee324. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DEXN92265985.
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 0xec9e9f2f599275d19fa0c946234f9dd9391b35a206187350f50514e5b49d5494. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEXN92265995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71a545d37a47e3ab130157591d5427a7484f2922f42702dd797fa34d4e52598. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEXN92266001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f0ada4fa5b6b149d80169557304beebf5275691368be524730c118270607b9. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DEXN92266005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775d2cd08637bf3f407c853952ad3368f7ddf73db573f3cd7f919a7a60f6ddba. 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/DEXN92266009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bcd3eacd5db7000d90ee9496616a4cd15f9f9ad993e56ca44cc706b7c44427. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEXN92266015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e038ff0366f98fd84508231b84d6b29adbe5cd3328df5106c3255d7604d1da. 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/DEXN92266019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c138e8bdfbfbba1e3f493dfcfa93fd6b8b4b66f549c58c3955c6555689305cc. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEXN92266022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d355fd5e68c2258b5eb010e5eba7c01bc553d36cc7ee5ee77c28aa46f79ed90. 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/ES71G2101375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef2719ff8f6042d3b2894a1ea08386fd97b79987c3c3a48cec24da67204abd4. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ES71G2150599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c539dd3f05745a5945be3335000607663e3667964df40eb49a3324bda1192d9. 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/ES71G2500335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e8c9a693725d0a277dba1690dd07be9db95b8f7980df4a44abc73bce178f98. 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/ES5301028142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9291f8b4408a4e72606a685773a849017ce22c06989297717ea88de12804d5. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ES5301662297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504d178b869a16aa546587740a457ef0a452bb1f8257b56b4080e5bc947e1b02. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:25:37Z), 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/ES5301662298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeec5b2906311a6d2d4c738d7aeb891a19384215c79a40c0fd4d0d8accfbb99f. 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/ES5301662320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd29887012f355bb1259cc7613b569ac7c2efaddf0875808f9a4132cd69b8771. 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/ES5301662327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614af0439dfc4f26a02453865808cdfeb1879f13076f906c56123b83f56f7335. 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/ES5301662329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d028b0bee5f420091ee992d5ebf921dac51ccc7ec7d8b97f55d1fc3ca17264. 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/ES5301662319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ff46f94ca45b0bbad15cfd43510c2a0c7d057b017e3e5c95e614a145f42267. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ES5301662323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67fdfed183280f1901f98dd813c0bac90277aa52c83d183e8063910ff9b84d6. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ES5301662325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf67856839c1e2f637586a0b0d1e3259d61a15cd8cff8b0512b787affe2e99d9. 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/ES01G1201567.