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 0x50444e7d75ea364d33dc533609c3acdeb2eef4383fea43345ccbb86d664cbf69. 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/1080b9e0-1d24-47d2-8a24-ba77086e36aa.json and https://artists.proofprofile.net/proofs/artist/1080b9e0-1d24-47d2-8a24-ba77086e36aa.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 0xe20c17f9af457ce1c864bb4cdd271cae962d015ae222f5f8fbb32ac07201d662. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZTAU2280590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dabb922f770bfad60424f52902e59c1275762ac65a86e81eff90d37196a17e9. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZTAU2280597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcfa9e512e8f0591c3815adcc91b032220353b04cdf74964c1b7e498379f521. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZFZ42364140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c89e662a22e1f8c8096121ad7e0cb652f89b3f8f235506c411364d864edea7. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZFZ42364136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34241b749af5e96bb6e665ad69608cd3ced2c266b4694db3f991225ede437d8a. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZNWS2306850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4a546f8f41951b6fcc121b44707cd4b552d8254cbc2a37cc15ea7dde05e7e3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZNWS2306852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd942f4909ce36246bf1b8329f7a63b11c2ef885b899f20254e2a1dc0e7657cd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWS2306860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec2ff7eac3ec93653e4ea02980c03a30ace7e179ceaeb4674c63b8e43ddc8a7. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZNWS2306862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bcf36f0d52b69fe97a621ca35ee0504e044129e921ef982c9f2814c115fa0e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ32458183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e25655fbd984cd13564247f2f365d42a70f5cc55b866323afe5650ba60ffaf. 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/QZFZ32458186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3358bacddd4593f6fc8a8102298d98b57f2170e7135518d14af1b4413bb10caa. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6J2419081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65ecebfebe3fd72a3551b0cd6f82f045821851a11a53113d4642340b4929bd9. 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/QZK6H2461547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737542a569dac60c5acb44a7a0d8d9dd04f9fbaabe991cb9536020f15abffe89. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZK6H2461548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87aa64cbeebf6fbd7c9e73d020d9c03181dfd307cbbc519ca696511131c65e8. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZWFR2405971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d3d8beef78e44d99459748e39681f1f8f36b82224e76196f20dfd3ef35c89d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWFR2405973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679f1cfd7c931889a103b6395100376979593088786305af1f036283e3dfc431. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZWFR2405974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead2cdf57c349000cebf1b8722b1d11d06a17c657a82c98403419d32cb7ee863. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZWFR2405980.
Blending Zone Vol.1: Welcome To My Kitchen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268eba4f7fb3da292039b8299c3da17caa88e36201cf4addd571d00c4f9f8300. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QT3F32412378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f8af6b37e83aea9dfd58dd4738733d9a9d356f9ab2b1e456167a93b62ac336. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3F32412380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb455eac5726e571518cfc688d64954a046f559da6b290ecaf1895b00125dcfa. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT3F32412382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c3d8f2c9819718fdcafe5969b9b3efa7d16ad6763f8b0c4d32ee14c2caacfb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES52559470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05efa31d3662232d2b7c6e7a8ce8960c6a800f5048e3a7722d75517b866a6d37. 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/QZES52559471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bec615560b84200bce4d93f7a7949e2e15aad1f43e670c8ee4502502255a698. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES52559472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4afce09b5e658c60a0e1f78bd408726a6d180e341a33ff1a5d2883c31b408a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZES52559473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d58875e7374c01380db52373ce04ba7a0e7c9cf586b18a25c66a0b204b5a6be. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZES52559474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cc9a6054d6590fdca3ef0ee757a1a569561311c51ee870588fa161bd2a1a68. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES52559475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84721060ffd34b5c87b0d51c8873ff9a003d24f0e5d8a58b3c2f0223e89f109. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZK6H2524072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad93954e088f01cb6e0fd03840fb5f586eb20147c5140ca6f89efa100e365e2d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWX2545810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4841882cd5508c7cc90ff4c130d9e0fe17e86a01d6f85f18897118b030daec. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZTB72545737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa321f6163fa6ff83a801df925f904a34ba2a2dec3ad2dfb978ecf8f4eb15b7de. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZTB72545738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b4df538c6529ca0489e0b4b73a08bfa9b25768d5e398a65faecbc529d593f5. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZTB72545743.