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 0xf92ccdf6ed6a95aa80b432271033458cd701fae5461235926dd72f0fb5b98093. 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/21f79b1b-c2bd-4a12-95b1-b6ef75a04985.json and https://artists.proofprofile.net/proofs/artist/21f79b1b-c2bd-4a12-95b1-b6ef75a04985.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Casa de Papel (Soundtrack de la serie de Netflix)
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 0x84bd49678f61569973a8414415649c9dca5cd1b8b74baa5ab37338b5ac5ea002. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZ8BZ2307270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c331bbdd39de9c11f67c379d8a691bc3e75dabd473db4f3d6bb8a636da1dac. 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/QZ8BZ2307273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9674992acd0e3bd6f5df836cc89349a5da8848d7e0e93780e2a54615850c0bd7. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZ8BZ2307274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863122df0afa79bb0615ab818413d07017198c932f7f9e4231a724782606013e. 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/QZ8BZ2307278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c4712500d760a1d459569699189aa96752c4b10c62757bf729f0ad0cf51093. 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/QZ8BZ2307283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeee4b3b43951b2e166e60866017988c32bc0220665084254c5b783725d4583b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:19:37Z), 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/QZ8BZ2307284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ce0252d1c80f40c55a2f64effedabbe7758468b500788fb48afc63e423259d. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZ8BZ2307286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bab5126889492850abf6b1859b78726bbc34ecca7c2c606767af5323738959. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:31:42Z), 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/QZ8BZ2307288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e641f003f05fe86073357e372bdccbdca75e82dbcb479b0b99c362a9ab88d1. 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/QZ8BZ2307289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4a56615b58d862fb6e4d62a01e008ee5e0d28756f1d0473bcccd109652fc83. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZ8BZ2307290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ce9b42a81094d32bbf8242b93b4d62da85e6d7ee2c239a83b5acbd31f24322. 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/QZ8BZ2307292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266920a4629e72e5c68e652600eef122e20bfd5269d6bb77a8c705c6e2586e0e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:34:59Z), 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/QZ8BZ2307293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d56eea1c6fe4b6a20b690077c958332e5c7333408e9bc6da6b76f0045873428. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/QZ8BZ2307294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7839800cdb545a3cf4ad748736961bf80f1748c86aa30814c86b69a1b589a8. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:23:48Z), 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/QZ8BZ2307295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9925675bc03dc108689053aca2b39fc6f5443025492697cbec9facbfe075b255. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:55:00Z), 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/QZ8BZ2307297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762b5cdd9c05be245d11eaad6387e4fe5cc1a326e8f64798392d723da0438e2c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:10:50Z), 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/QZ8BZ2307299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63616fd1ae18db305a685017571633f4fa6d99ba8420b5cca08f61c855c0a218. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZ8BZ2307300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8c26d70aebb26225ecef5935d957abe5425b86ce198c45a7cb7f587d8c37ec. 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/QZ8BZ2307310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c5a67c2b935e959cce0fa811a67a8f2ed3927af9a748c3e07693aaf2d1d465. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZ8BZ2307311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51980bfc27c04764b6897d9019fe63c7406617492d167d2c1dad81ac6b9aebd9. 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/QZ8BZ2307313.