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 0x5f3752b8b7a91528a80e8d5c4b188534b760bde953e7c6e0ca3107c14fd816da. 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/36f0d479-e1c6-4d7c-ad48-46fe9b9c111f.json and https://artists.proofprofile.net/proofs/artist/36f0d479-e1c6-4d7c-ad48-46fe9b9c111f.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 0x93301c253cdfb0ac4b4d1722fff1f48509a5cb1381caad0e6258f1b0174de9cc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR3P90300820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81a4b29ee5f9718eba9bbc231283724ee324bf773fb17d883e41885d26723ee. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/FR3P90300830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1505a1f4cfe5f19e8c74a577de455c3913ca793164744970a69304efaa6f50. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/FR3P90300860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d4191ab7b1a9c9653be5c2eb83db2ceb7141f38a079956d7e3136fa3f6a00e. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/FR3P90300870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b51934248d162b59d55ebc9bec8d394c526f54b70634651e4fc758bbfd3c8c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR3P90700310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07402e9c16828f70cd5fd3751875a9ad3389c8d231406b2fff8a9c9d436421fa. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR3P90800200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8445b5f96d104628e44d36ff2c88d70372fb568fa5f6ff1e01f15aa6570017e4. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:29:16Z), 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/FR3IJ0900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a1dcbf02da7b5ab2bd9e3c30c371479a9bf7b9cc914e08e0e215e69427a627. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FR3IJ0900037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee6fd4f1e94bf53de5d80c796fea8c1ee64a17c44f4ec63bed6a8bb11219bdd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/AR1VJ1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee6fd4f1e94bf53de5d80c796fea8c1ee64a17c44f4ec63bed6a8bb11219bdd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/AR1VJ1300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1a43c70357da8e3872baa9e94aa4d6275a641ecd56aeeaa9b94574690febde. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEHE41400092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0e45098c67ca193a00bc34fba656cc21847dd424b869c87aad7f6714af6b2c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRY391919420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1d1e3bcdd726040d8eba4ead3cc71f7a5ccb2558a33c20de3ef66cd6a48f3d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAU2143752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d052e5325dc4bbb1651ef1f6835e7a469c5602894ef55d79064a5fefcd0582a. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZTAU2143753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9bedba180adbeed033322cfdd82e46cc10fe742027e9cd271fbfebb6d0e982. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTAU2143755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13ddcdf7e45f4f739bba236a819ef8fb59f8673836215463daa3c0915016165d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTAU2143756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa98940f1de52dbcd2cbf2f0f3a419ef5f319307367a25e33a2f2ee4c0b9f48a. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZTAU2143760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88af5d37690af8897b9bd1b006f2a998079bfe67a4b9d6a759caef1550f31de0. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTAU2143762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01993527424d0b94d9140c38e835ea84da2ea3516d09911e98e296e7b2db2813. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR3P90300930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7337b7cfc255eec97488988f50fcf19f95d163e37260f74e06f5fee368e4967. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:19:38Z), 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/AR0341600145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d2c2021ff26c8a2d47c0948562f9817f0c5885d6966404c364cb29d2e70432. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/FR3P90300880.
CAVALIER KING CHARLES (MATI Y ADRI Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6115062f879b1dd9cabcc9e3896957f177bef2ba4664a52be58e7332c593c3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ARF842400044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9fdfeb90f0e1dabccbb1129c05162aa48945be809ac1d47f371b7ce207568c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ARF842500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd2443096265d57ce102d2a5863b3bba016ff0a9e8a49c7f064985ef63d0ca3. 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/ARR4B2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd2443096265d57ce102d2a5863b3bba016ff0a9e8a49c7f064985ef63d0ca3. 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/ARR4B2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc972047fa891e91be83caae622029e5ed23aa3966c18fbf168627cb9f73e0f7c. 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/FR99S1000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe972a888dad53267bb13de7b3a209cdaed265bcb5cb9c00098ff750343b4a3f6. 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/ARHXW2204037.
Canciones Sobre una Casa, Cuatro Amigos y un Perro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2a97db3f5bc7de8b79ed6104e3349b2a04a3e70495345eaf8f546d782c654d. 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/ARZ882100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92a4c105facaab62ddc72c5e7cd5c7716a1b34f59e2be2e2edf8b3b16dd5166. 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/USA560696211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa037882c4b3eccd7f659c15bcb4595cbb2f2b63e717808d5b538e242cede8e. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/AR2MG2000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200c2536d33117f611006697715e76b5c5b95e3f0686903f7edd3e4fb8fccfe6. 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/AR2MG2000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eedd815c1a8db18e06016ac9cdaa98434e4d2d643b3f9723ab0ac844b888353. 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/AR2MG2000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbece9017a443fa7c62adc478a88f470db755d5a969282748f28b0d377685c45e. 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/AR1K22500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5dcb0e6610bb0be08fad345c5238db238cf6adf9cc45bac59fe131110e1d72. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/ARVIN2100028.
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 0xb8b6c75e70cc160201aeb5137572e9427ec5740ce3e8180cbfe1e91ae193fee3. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DEPI82309529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9782e87ab6f7663da78b2f19e4f25658a16fcabf9bc6f30304691781c243296c. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/AR1K22100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ebab407e73c9a02554a1af5a250fbc235b2ebfbf8bc7ece9cd108ee6c71b5c. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QMDA72421027.