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 0x7862c8ae6dc9533f09c16eb57640ad1a7cfe8483bd5e75c509e2585655952880. 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/876f9143-361b-4a92-9759-516b0c0bf4f9.json and https://artists.proofprofile.net/proofs/artist/876f9143-361b-4a92-9759-516b0c0bf4f9.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 0xa252d9a2ca5b935e77619ed6f338300fb579059a5488f2142df7b47e8f348097. 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/TCAHQ2383168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311493192660d812f3b377dc8fe6fda68ab18d8801da4ce27fd46c8546d6f10d. 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/TCAHI2358679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084463c07c0fbb4ec3fc5e1b3b9f95275e4e4bf1dfa28b828f8c19bbbf9b4ee7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZVEM2311346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8bee1a8683e851a4b1d7630c9957e387ac1653cb121cf3e4604b5778b2495a. 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/TLREW2234373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728cd3e91d25fc1a10844be2905ec9505daf52f530d5abed09818592dc8883a6. 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/TLREW2220370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1ce41dcf67cc05a9425eba21da1915d4b08a53af402b7e9916d6355097dd52. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZPEW2298405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23e490f3d21140684f6123f69a4f2b608f73d8a043ba3687e03fd2d6509d624. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZPEW2257174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57056f966a3372f27df3c39698f3c8aa67a2ea834b0ee32d1710e1864cf804d8. 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/QMFF92000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852ab218241fa501f7334a424404700ebe4730c32bae7ac6ed93775738f5db49. 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/INS172002093.
Mashallah (feat. Sukriti Kakar & Prakriti Kakar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07741f8adddf41dd8755418fb5c901c7dba143d5fcf82ec92c7c7c75cc92889. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZVEM1883494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb29bd15f262e3751391a27958f7b1302b3b6e26a75ec6c9796d74e0e6f4415a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USAT21902553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f169fa0533e448c699c98820e9b0a5ee63b0026e56c1dcaba25536b9a342cb1. 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/USAT21902563.
Mr. Williams (feat. THEMXXNLIGHT & Curren$y) / Where Is the Love
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2519bc941b8ca2ba9aaa5524fe47f6fc06e51a95cc452c135ab93c7ff3cc6990. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21804236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71dc7c35f66caea7b1093d2053b31928ba4afcbf0e531e6d30038384ff11980. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USAT21804246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cb6683f72318e3b3e338a43e87a0829f863eb5cf95504ecd24bddacfd35ca0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USAT21804247.