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 0xebfe088a42df394ecb3e589f7b0d3de13f588fdfe2f4d1d7b0f85e0fc2e45a98. 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/cd4f1a46-fadd-4e59-8d06-12a5fae1095a.json and https://artists.proofprofile.net/proofs/artist/cd4f1a46-fadd-4e59-8d06-12a5fae1095a.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 0x5de27d9e0c022084d4707eb4c0a34d4e594d35b6e8245b36538c1dce10770bcd. 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/QZK6K2221269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa011620131ad74ef8e114b47bbf03a5dc6413cc8d7c5bd2d880f5682309c312f. 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/QZDA42022788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec8e07e1049c4a3fa1d5639fce8079f88c7fe9d937165d7fb00fa1d9935a2c4. 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/QZDA42022790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba43cbb0da9888c6b25c5eda299283ce73fa2a2b4e6780954cbaf82684c951b. 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/QZDA42022791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a624e94138bd154c695b2b48475bd86cf34739fc2a447cdf4c39632e01539a. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QZDA42022787.
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 0x2ef9e30f6f4edbb82ab4adeb1e43233c32046fc5745d5f1a607dfecb63fa19bb. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZDA42022789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47f9b604a6d1ea62c81939c43f4adfed76115e7e32c632b8084774c357ca236. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QZDA42022792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f53c3081806171dff1ff959878fc3624bea1fe96bdf9a48528a875eaa5395a. 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/QZFYY1919254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf896ceb1978ede4c078853ea3baf912c5795fb3ff7dabf9c8b4288cb7a95e509. 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/QZFYY1919258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbfc7edc4d01ed9e7fed205a3e19297a733c39bfb4e919524dc8d123066fc9a. 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/QZFYY1919260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525c2d4dab04a3c5c243d9790fe8187a9c5e5e8a8534659703986b242f17c088. 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/QZFYY1919262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2995351cd9b523a0262a1882fd168ff1f77f9a502e56035bd1b204000cb182. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZFYY1919255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875c3511a09274dc390064e51edacf38448dbaca65c523fe47f961a23d7150af. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZFYY1919256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd077ad5a62978e9282f67ade7657c0e5ba905762d3aff257983d394c5918ba5d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZFYY1919257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3f255bb6c24fe7bf2a8a6d1ad4fc8555f6b80ffa57ab28c8b72dcc386e6915. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/QZFYY1919259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2587c5d06cb7a00a60b218c40b7f0a02f94d5fc3bca082dac57622534eefd57c. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZFYY1919261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82353c6e3a38b96d085459e6bb29fb8ab72bcf9f321957e350c3c28404aefad. 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/QM2PV1722577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86a837e35d7a0a35b37ccc5efcf713e93a4c6d4cd41a6ddcc02464764e4d878. 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/QM2PV1722584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2c5756e6ad569aa7eb68f01514a78833f3d2666d47de72c49daa68a90269b7. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/QM2PV1722579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082cc3724dd811e71f23b5e4d09874052dd413028c125cea8fc0fe15e78b5359. 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/QZZ7X2444745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856979ee1e8f5b181e4bfcf83d93d1518fdb9cebc9a255e09642a2faba702481. 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/QZZ7X2444746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3662d7e396e0fa10311aaa3e5131c9194e83ae911350cd159c9577451b53f93. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:09:47Z), 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/QZZ7X2444747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53232c3d499d679d694c06b5b8f773e1e60bf06abc36a7eba1ba9282adf754a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZZ7X2444748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc889e07397244875dfe2531b071f7f047b661f9fc8d150aaaa8276125e68784d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-16T14:10:00Z), 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/QZZ7X2444749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd731ab5cee1ec4aa0fa6add43cea96f058573197d84df7f7d2824848be2395b. 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/QZZ7X2444751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fe11fe7dac9ae74f60a58da86a49a9a55e4afc9fb1e4d4f3e1012476efcb3d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZZ7X2444752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf28051f0ca1e8661055fc0bc408533a691e9a72558b2570015230e9d33872ec. 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/QZZ7X2444753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882794a42fe677bbd7307f92398426fde030636fc9bd302bc55d4b2377bd44ec. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZZ7X2444754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ffe49c99852e37167c91313587bdd09b7c539db47499e0e2d031de6103c427. 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/QZZ7X2444750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1b18200f0e6c98107986e93205eceb66a0d77c8449c13ac1cc07d75256ce78. 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/ROCMA2513595.