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 0x19731e5af3c585b7d84d6aad810a0f5cf2bbd834b57c1d9ea4408bcc4f8bf898. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bec70992-b928-40b1-a85f-df0a6981c73f.json and https://artists.proofprofile.net/proofs/artist/bec70992-b928-40b1-a85f-df0a6981c73f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hierba Mala Crece en Toda Tierra, Compilado de Skapunk Latino Vol.1
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 0x920c4e091a46dbf69b8c6a5afc6031f23a2bcc1c832a027a24862bf70e5581c7. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZ5AB2034002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57e3005b66e70d5c45f608287b382eaaeeddeb54c09a47c41e5e007125a72ae. 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/QZGLM2201966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23170b62847d52dbbf02176cbfcab1b2cbe66b60c4621b15a9e45d0209609b3a. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QMDA71407142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3d30031ff0923fa613a8bcb87fc2b892ebce455ccb722475593ad7e4f35a25. 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/QMDA71407146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1be73db80aaf321ebfe2aac1325043941f40fe78a86632abe15d8c9c7cf6f2. 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/QMDA71407151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7f3ed7996f77c91b13a14f83cd35d10e7c57c4454f372e6d4e3cbb902d4eaf. 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/QMDA71407152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850c973ea0d20f7580f11061c12154a8165004692ed6dbd1e9965760fced70da. 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/ESA031916598.
Skamania. Lo Mejor del Ska Argentino Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0762d35abde1d8e291a987b4eb973c49f569e7bd04dbc1f817b72654c929347a. 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/ESA031916838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc468694ddec24a4d920325d850ce19aba0d84c4754c422954b080441b4134d2e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ESA031916839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033dcfd52314ece4cc6ad05740c7ec5e0659a40c791059d95a5ee2bed516e396. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ESA031916840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d21ebfd1d80530bc356f4c799aa7298ae9347f7fbf2b9d7e0e1348dfaf593e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ESA031916841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81cca4cf201512309db16840957b09c70185597ae46bf00394dd9c6ee12ea95. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ESA031916843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5363ce204567356efd8d04e197cf24dfe67685fe7d2c5538f5ee8af3df6679c3. 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/ESA031916844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d0e8beb97465b3b48d52c1761b8fea258aa9d88235d3a2eaaecaf8f4eee015. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/ESA031916847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f605e5d2df4de9b1529e0aec2920d9f6b81644549331c1d19f27bcb821fe96d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ESA031916848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb890e4c4a11af353fb9d745c90a910f7da8cc344aff2249d4b20453467026cf2. 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/ESA031916850.