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 0x7d8eadb8b7138cffab69786c73a6f42361a0e56c4b3d1314aec223369a9cd900. 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/dfabb2cc-9ca1-4f8f-a766-ecdf9e6dcf57.json and https://artists.proofprofile.net/proofs/artist/dfabb2cc-9ca1-4f8f-a766-ecdf9e6dcf57.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 0x682bd11d7d899d6566a583996eed1d92f9ee9c72e7f133adaeb95afe9d1b73b0. 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/JPG102200598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c5d4727a5323ad3a53206fd31d30afe2efe81046e7d803ba6c5200396e23a0. 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/JPG102200599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7290ed99e4c1f41ebe1911608115bd156ac21a9f80f0ceaaa4d6be30584092. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPG102200600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383840a9a07ccbd996c1fbccf8ac56add7403db76fb04069d5208e8f9d3bcbdb. 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/JPG102200601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5848a334196beb32a911b63574012635730fc984c8321bd424de39a8ff5bdcd8. 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/JPG102200602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ee7a8aa463745b5253d409ced7d5370d336c451444a14124fedab0df5c1dbc. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/JPG102200603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb153353d4073d265972b9c1314b567e3fbcde43c266d64374fdaed98164659a8. 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/JPG102200604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc5c049db372c112ec1d3cbdae297088daf55ce5e34b40c42e678dbb8e76ea9. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/JPG102200605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163814ae3a40411b5c3bc7b43c0be995b5559be926059d37250e13319387475b. 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/JPG102200607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fdd2f162b56bbbf651668dc6ca2b709b0b949e9317372cb33558879579af15. 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/JPG102200608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54aefd4474f0b1d6660c4c59646978bc083e3535759cb0ddb3da5b26dc33caff. 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/JPG922200336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d4ad3eac17d3b554c4003989fb9232ef351ff001b4cdb5d55ba81ce26805b7. 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/JPG922200337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744718f4e3aa72c73fc29073470d9883072b432aeb322b24a0a2f66a8419170f. 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/JPG922200338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547d8c304272ec16e4dc291e670e3cadb168786cf25f7fdaace47959f3f5d32e. 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/JPG922200339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf998e3db39e2cdc2ba97eb589281e5d69faf5fa6d00338ac69df64625dd34067. 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/JPG922200340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ba36e0c2aba27b1a166b00414ee6cee07fb33937c21fa4a035c19479805edd. 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/JPG922200341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b99c3f46bda626ff5fed7c37b378eb7cb813fc29c1f3cbf97869e6c3ff9c284. 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/JPG922200342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee563236007863afc7d3b963ec58006416b5f310d1be5712b7c4bfe4da2d518e. 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/JPG922200343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7e68c6689f65d3b8987a3f4b094edc853fda8e4decc1dddc457e5ee3bffe01. 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/JPG922200344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14a2f4da52ccd314c49268cb5ce070679aba853c934e058d976cd012313b01c. 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/JPG922200345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6d143c6d18bcfda728ef717e8e82a221c71297055f33c536d7a8a071c32154. 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/JPG922200346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cddebc55aa4cc4d266f839792b15b0302dd8b8825059f5d014ff6ac1c9dcec. 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/JPG922200347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1edc8e829b9c5dcf961bfd5e4e88841e4ed0582b63cb0059e4cd5c5ac44c2ed. 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/JPS801943280.