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 0xa757bd0a45e516c9ee56667fefcf026a68702a9c767ab12c54f47b0d5d18053a. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb2d7843-4a44-4768-80c7-10ace6024480.json and https://artists.proofprofile.net/proofs/artist/fb2d7843-4a44-4768-80c7-10ace6024480.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 0x0a6c101de714a7e8eee45b65b4f886d91a2dd4e24072dbfaa15c6af3f509e140. 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/DKNA21011401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d44a080f8bbd11d72457422593ef46871c6561d5de30f85c53f79ca0e5dcc3b. 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/DKNA21011404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051f914be29a050bd753561a3ebf6c07a8b2ab4873bb4d48918f4072789a3f5d. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DKNA21011406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab630d37d82995a6e1c61f7fb221a295e984adb179102a78bf3a9ccff8a45cd. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/DKNA21011407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6c73324fe01db25cf7e148c8cfec2e7dd3bb0f513371f836bd342983002041. 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/QM7281508146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87e7b34e105a2e10ae48cc774d8f2fb644295ae72167463ffa6eb5e04ba7ef1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DKNA21706019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b86386c0a0d2f7db616c9d0a0c4a5d9191cb1bafbeb3238488a9c538cc92529. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DKNA21706022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdcf90c49c4a1b33c5f7642cad6ac3e6fbf6e40ee5b6d9832f076fe9178b0bd. 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/DKNA21700813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8105c6b45fa90a72f7105083f23a9a7dad42ae8209743482f42cb5364b65622. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DKNA22001102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21e6c84f6546eb839037604f4a2a5e677ab5ff0670a652674b2c741177e2bc3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DKNA22001105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4721f3c474bb3590c0c3f6871df008e0c4041c16a6a129085ced4452ebe70684. 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/DKNA22001115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc707448a339db68e05237c6cdbea5e599e7f6c300794e33f85af75ee3c73113. 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/DKNA22105205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fc8c3c2d117ac84b6f9f2ff7a8de474640416910773a40912c2ef2dd49821e. 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/DKNA22105207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08db4071a3f722b5fc9db15aa5bde5ebef8d6d3a116779e37c111546c533ec50. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DKNA21705909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74f7c74b0c93e85cc2b5d9efe7103e2a23f688511a8b3d2d9e74c1d01b78579. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DKNA21705920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d529103d8f19fe29677e34d100a045e66ff9462d5db3855e2a7af4d4f8c54d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DKNA21900904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87db8851cc31f8799f0122a1d90f54fa15c6df315ecabe342fcb8670c7d47d8c. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/DKNA21900611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a5c08fe767a7e7838fb58233402f91755458f649c8752a41354cf0dd084544. 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/DKNA21909301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cb5192232918d8ed7c7fac0eecbd5ab501459deebd71d8b971ea2017d6e531. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DKNA22206213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710a5ab29800660e7cc1cfe2deaed7659d1fe3a58e4bc10a7dd1546c9475d1ef. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DKNA22206001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2031a570a16d8094146cf45a21370f61df36bd441accbf949df619c61a2b2729. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DKNA21901905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d85dcbd0f3af50d0031bb5f349d245a7a7a0014fe6fbfb25a2ef6e18849082c. 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/DKNA21903807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7031253154812b441f15e1f43f9ca0173fbea2cbb877f316cedb4b695ee9f1f. 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/DKNA21903810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd97f9eca3d519de984a70666dedc4efcf64ab90640fde7d111ed8bf1843e2be. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DKNA21607607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d55dce41b04405b6a636133cc4eaaad91d900d0896278c9419bf923b07b9ec. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DKNA21700306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abc1344c2e6775482da63686d7fe3b8d36e88daeb422b4853904f2db330ac7a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DKNA22005507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7a016a3cd3aa83f9aa27ff95b11541a2856a4700c3e464aa76bf9ac159d2bd. 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/DKNA21116008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8b9e5903d26aa1ed72bb400a7dd614733efae6db4ed0eb39bf7a82ee7ed44a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DKNA21116009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d7aa4707905feb1ee98c280e0f6dec21798f4d733ad39b17a4927395916e62. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DKNA21608312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3097f12bb50055f098d5ecf809e00be03aeea46eae2a65644343b0c28828c37a. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DKNA21107003.