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 0xa56cc171a84a2f0548baaa802bc7b3335f40ab4946a2e1b446d091df6968bae0. 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/60f5f8b6-8df6-4988-ac33-6b80b9805f3a.json and https://artists.proofprofile.net/proofs/artist/60f5f8b6-8df6-4988-ac33-6b80b9805f3a.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 0xe268dce023a255fe659dd55a655642b961f90ff4f7a905321871c44251685eb7. 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/QZAKB2347404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a80f6ee0175f4a5643cee0d361c8eb855561a3b065ce0ac1431b45979b43004. 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/QZAKB2353581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494946c780f4b3e255968a1e597b36b7f8ff2d5711df48aa16ccfe632a7a8578. 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/QZAKB2359118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc112b4613e8c951d970586cd1d6624f513374c9e7dbe167dcf2896a63496077f. 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/QZAKB2359119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2862d4e9014160ae4286aab788721312a099d87ff92fc854c2d80166979185f8. 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/QZAKB2359120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7aa1bfaeb3d574dcd01f03f9c0ac48ac35b8ef8a99db2b11850473109abf58. 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/QZAKB2359122.
From The First Time - Live at Parque Mayer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fa8086000deb5e7d5b431521c659519b261055440a1a765d535e6306f8f28d. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:24:53Z), 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/NL9KQ2443482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7c76914c0dd05c5339da41fca541d2fb105085dde4d78d73fa686e8f000697. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/NL2J92402034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4061e46a9658ad03dd75d934f61e56ba4bfe0c4edd604c76e5cc8d12226a560. 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/NL2J92402623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbbebc7aea32f07b0242f3026c467017552f75ae709c47426383f7e5a5378ab. 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/NL2J92404123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1bda43e18ddd3e0db813897088e48d89a83f62ce405a583b2f090a70cb5e82. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/NL2J92404122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbb21a79bc5081c94dd50635881ad5102aff88f0e98eb3bf74070fc5737e49f. 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/NL2J92504666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e848643b1e61e141982808e37924761b0ea354f0d11bad21eb13058a091e663. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/NL2J92504556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1bda43e18ddd3e0db813897088e48d89a83f62ce405a583b2f090a70cb5e82. 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/NL2J92404122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e848643b1e61e141982808e37924761b0ea354f0d11bad21eb13058a091e663. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NL2J92504556.
Blues One (I'm Going To Leave This Place)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eabe78e16859942bd5471a839bf9fde5db35a6aa5169444be3e7d3848845b0d. 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/NL2J92511917.