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 0x5180ca585c9391984a3412de6cf89344019e64c9a547102a01967d358addf27e. 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/f2e96728-b5e8-40fa-9442-45721f33c1eb.json and https://artists.proofprofile.net/proofs/artist/f2e96728-b5e8-40fa-9442-45721f33c1eb.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 0x0f1b75d041d0439c2a277ebfc5f018436ab870255dfe879cf537514fb4a407b2. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZK6N2254778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc9549c2298ca54b162efaa8c8dd3858aa9bb834b9e9883f16a18f6ee38193e. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZK6M2211854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d5153367d19c1e0ff3689cfc621824be020d88b6c722e9f75cceec6af176f4. 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/QZNWX2213219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79917549fb72b48443670066f7358bbd8a6391941298b54bb6345b230f17fa8d. 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/QZTAX2282144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cc227a7cdae261ca2cfcec9bb591b530536974e9c3ec43133166108053cdb9. 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/QZFZ32311818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37215bc2508800b41b167cd8b3ae18fd6104febc9f4648bc2916b138476412dd. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZFZ32313406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490ab3a9ab5fda3136763add92750519bbe5f33e34ef87fa5e274ec52bec07c2. 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/QZHN92359206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5755b2d153e120ba2bbc727fc4d0246720777ba726aba7925f54be232bab76. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZK6G2366369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae38dd9772cd0367535c5244b9aecf5f49a0b43e953c11ccfb2646569e1920e. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZWFN2307330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948c585cd3ed8c28c2bb6fc08a5958525da1e455d6cfb29c8beeafd3c9bc25bc. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZDA52416991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d5ae5b8e8f3ab5385cb1e095437d13c6e5a87ed6f7d68c597f2c53674610e3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZK6K2471021.
RENAULT 12 EN LA NIEVE EL TERROR DE LAS 4X4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb678880f7025e06b230707f156d7d31ba2ca1de66d25c91434cbbd04a0ce20. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:05:30Z), 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/QZMEP2413597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc578424ee55dc91c38180bd47653927c3bae5371d291c2feaa7e43d78e85a5. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:52:17Z), 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/QZTAW2423771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ec6dc69bab383397612c113c9dd812f5bf2228ed674e8755f1ca7d0a5e48bf. 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/QZTBB2452613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec68948bb8cf0bf3a3f47c85773e9942c011c7c5260922acf44fdd7e0797525d. 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/QZWFQ2487427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015711d1c9106fbf34d95c9f10ee0c9fd744896a7fa67cc78a63143a597db4b8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:10:46Z), 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/QZTAU2556712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef75c99211737f85981cc9aec6272bc1f0967774624290d521e52b318758d37. 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/QZTAU2556713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e52e61f28ec8fad3e4a84697778892ffb29b0ecc6e7bc1802682c8d207827e1. 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/QMDA62457238.