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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 0xc78131045fd63924dcb0ec3a8f7e70a077a9ade4b1ec3802bfc4878cc5aa5cd9. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7efc8186-0a44-4612-a8ce-fbad028d4544.json and https://artists.proofprofile.net/proofs/artist/7efc8186-0a44-4612-a8ce-fbad028d4544.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 0xdfd1705b1995c333d0ffc726d5605842dd0cbaa16f194c696d892a2d70041129. 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/NOCTE1807010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65e994bea0baf3ded2d00ad65f3f114fbbcf5b9f851bcbdc7d63fc02dd49721. 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/NOCTE1807020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23968fad84cd12163093609914eb0d26260ada920680c10c48ddd1760e0361a. 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/NOCTE1807030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe53f2222ea1af99cc9adabc0d37ba94907c1b67e8fc0365783c3747fec7d03. 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/NOCTE1807040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fe9381c616cf574b5768495b0e25ab72b83aa3acc2aaae29d8e457612656d1. 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/NOCTE1609010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247d96b1d921ebfbd96f50355155f12930134f5e867016bea5e51c942a77d97b. 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/NOCTE1609020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02db676d167b1adaf6cd9c768833066952a13447ae9f7f5dc310847576372079. 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/NOCTE1609030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe4b5deacd1c680e84dfd1e74782c7b3f0f0c6abd95f3645c2bfc0806061fe5. 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/NOCTE1609040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0da1e4552b05165f0d726be7dc2baed30c8ec0e78e0190dd0e56bae75f6331. 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/NOCTE1609050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8b8878da019fe2b9d37b1617efb7f651e7467da645e9e3f5fa7ef2d8158a6f. 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/NOCTE1707010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc1dcb1f02d24ad349ec9158d0c8a873cd3b8a6f15a0253d7eb813af0f2d576. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/NOCTE1707020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf734f9ad683afc5a3fcc6a633cad7b6502da34d9572b562f863d1c9d3bf29dd7. 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/NOCTE1707030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2863bde7995c9dfd5bf5cbba42bcc394749f085978832a88c1397888095d8c. 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/NOCTE1707040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1dca1a5cf37b07a3168080e16aa26bac4025a195f51ebeeb5c7eeef0c083d7d. 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/NOCTE1707050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1752c0adffcb815668cea7e04909e5a5561e5ec5449941084421fd663fca76. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/NOCTE1707060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2cdef18af54e9a96e6a07cab15a1c486ccc29b94b7e1f648f795b4ea03bc75. 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/NOCTE1707070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1f2ad49ced0cb021680c76a441243adca50904721b917e94db7c4bdec8c809. 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/NOCTE1707080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2546b50a64925b0e3462cff0d9f553ed32ed864872956d7de00e8de745e6a7f1. 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/NOCTE1706090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62c4b20d3fb6c23c44a355f42b6f561e01911ee361ec0631bf22aae9418f5f23. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NOCTE1709010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57db226364d0aa6eda34087ef19803e018e495fb4bc09c323d5b7843a739c7be. 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/NOCTE1709090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80783ae70262aab506ba6c34187f83b219e30b61c2db01190e35c68f7b96d46. 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/NOCTE1709020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4945860faa91fe81ba23fba81874d9952370fb61398c028b8ce2e81544c7fa88. 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/NOCTE1709100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2991216ed8e34f05dca1d0a276b7c326365f160be4abb8fc92f1a569df0f7fe0. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/NOCTE1709030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe247de697358ada038e9cbce0ee0f712d0068f1baea76545c52c9d37da1630e8. 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/NOCTE1709110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fbe59b935e61aaceda0f9c5dda7ebb6667fc009c4fe133d634c7a064a036c1. 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/NOCTE1709050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b02b9a659df74e92e6efd8e1837b84c62aed57876bb26a4366b3a24ff1ff9a9. 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/NOCTE1709130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79e2b234fa36bd689ea979ad82709fb4eeb554f17ed73fc4ba0d0fc0400be73. 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/NOCTE1709060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771d21b754d8fc4f28154575701a81e07776881dfcc34a8ca91e2a49fdfd11c0. 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/NOCTE1709070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6853cf282996747938b5bc464409fe7803b517c5246528d4203cf2b35bdab179. 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/NOCTE1709150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f3472c002480e58f56e20154bf527f6320c0b3b4e3923168c71d6796392b47. 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/NOCTE1709080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccbe694f039fb379023fdec4c9b8b824f41bd23c08338752cf5819a3e4da243. 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/NOCTE1708010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544e78e150c552c1107bf155a027768b292666f94b1c21f3a575c74a9e6052de. 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/NOCTE1708020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50829813cff65c1ea06983932e11c052317fa6e448d6c4f602b956e54e87148c. 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/NOCTE1708040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19194309abfbfe7d69a52926a8eb2e1b5e66e27de534682536aac60419e094e2. 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/NOCTE1708050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78df7835145a24a856d84f5e749e6a8492021155263a459f92c08a3fd5012192. 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/NOCTE1708060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e06134a0cdbce7e90318cef0d768e811fa2ae8a62ce5aa6d72723e7e80e5f96. 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/NOCTE1708070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9fabf45b74beca5d8322d4d09de8b0464a2bdca4ac55787d4545342efbbd69. 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/NLVZ22100004.
Quickstar Productions Presents : Goin Back Home volume 4