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 0xd8ce766796ab7723225af797227fc3b4a7a08afe77a719627dbf3cf2d2704bf1. 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/4589926d-57e7-4ccd-a369-b45f1f444146.json and https://artists.proofprofile.net/proofs/artist/4589926d-57e7-4ccd-a369-b45f1f444146.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 0x7ec92bee77f2934508e90d68b88ff6084e02ca7d5b982889b245ac84e69e893b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ITUM71700648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f12b09e3e1419ed5c70f9f7077a2aa8e79ad094a96dbed0997803bb0dde630b. 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/ITUM71700647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612028eb0ede9951f4326e4147f29075abf40d1c130f2d880901d94d277178a5. 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/ITUM71700651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d55479cbf9a4bd73b4d81d01ef38661f7f8230ad99b03193cbf3692cb1b45ef. 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/ITUM71700653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3725634c1816d8b0fabef686b21e2dc5991838eb9cdb62ac30f2362a2649b003. 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/ITUM71800304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17070d905641b7d47f775f021d86d74a84ea5078fc8a8985851d0f9929841cd8. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ITUM71800114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3725634c1816d8b0fabef686b21e2dc5991838eb9cdb62ac30f2362a2649b003. 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/ITUM71800304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd291a6621bcfdb3c4bc7dde0cfc574e5ad637eea399bb4d8f7de25f92d988a7. 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/ITUM71800299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af4f42a4f3bd939928405c8c728652d69d124bb29bfca0b7dbe78b49c8b11d3. 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/ITUM71800307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee075dff380de06d644b619a887bd8fa6f0b9491683206629c946b763cf3860. 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/ITUM71800306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadab28fdbf928d76747a8364167c8feddbd2203caba737d451947af426a1bf7. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/ITUM71900107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7e18729b64d576c8b85d3f565373c3be2973141cb039c5de401fa5e4da4f75. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ITUM71900105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798a9e1f1fd9ccad0dc4a86b98e0f029b257609b16b20f2d6298960b1e22e9dd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ITUM71900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763b6e6c7700e150595a1bd1d97719cdccf98b5b9d0269d92514fe2ed72c19b2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ITUM72000244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d479a7ec6f525cacebcd9ad4435bd65bc5ccae23fbba75138b4ba720c556199. 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/ITUM72000979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d0f764affbc92aff04075715c2fcf563baa5ce8b7fa26efda165fb280cb141. 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/ITUM72300656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f30e67283c9279547cae856bf8a55390d164867f730f04753fa9a53984e3ba. Chain 2 (Bitcoin): anchored in block 957029 (2026-07-07T11:17:55Z), 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/ITQ001900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f30e67283c9279547cae856bf8a55390d164867f730f04753fa9a53984e3ba. 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/ITQ001900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f30e67283c9279547cae856bf8a55390d164867f730f04753fa9a53984e3ba. 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/ITQ001900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f30e67283c9279547cae856bf8a55390d164867f730f04753fa9a53984e3ba. 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/ITQ001900005.
Duets / Duets Forever - Tutti cantano Cristina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba828d4faee277d9095fbdc790f52ea7efcc951ce47d2d6b002a0ec28ee4139. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITQ001800628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba828d4faee277d9095fbdc790f52ea7efcc951ce47d2d6b002a0ec28ee4139. 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/ITQ001800628.
La Befana vien di notte (Colonna sonora originale)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4d8d021a3e1a4b7e1525cb336604c80cf4c4e18420911288f78d2569c7cbad. 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/ITUM71801293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f30e67283c9279547cae856bf8a55390d164867f730f04753fa9a53984e3ba. 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/ITQ001900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bafa1860fbcb0633ca5a1293d7e9f09baa51ff37fedd90e843a62d4143b6e6. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ITUM71801378.
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 0x8d9693bad438af830b9e9884531bfc539646d7120c031686fbd5fa194c71d9ed. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/ITUM71700646.