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 0x70c6a2b621c22ce06c82b89d6dd1398674d3f44dc798596e2f15071f4f1fbb70. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3811febc-4d4f-4cd1-baa4-042f0223251b.json and https://artists.proofprofile.net/proofs/artist/3811febc-4d4f-4cd1-baa4-042f0223251b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f60caf9158b9449cc3b464f88ccc05c290285a7b40b5b6cba637eae431d94c. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:44:28Z), 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/ARF049701147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc210e8e0f4e0d5c950aa70d4f02d5e1791dd4f2fc5313be45d2811dc6a8e6a6d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:09:59Z), 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/ARF040000545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c94a5e3988095ece219e97c9227682795e3a1d97f22902549137e3845f06a3. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:03:27Z), 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/ARF040000546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c31ec8632d94236758fd2c3377c4c3c002800eab39cbe06bf0ee3cbcc4872f. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ARF049600255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29645d2e74e43351a347bc0569a970ee65e636470ae38525bd08c2cd7095d000. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ARF049600256.
Hernan Figueroa Reyes Cronología - El Romántico Trovador (1967)
Hernan Figueroa Reyes Cronología - Para los Más Jóvenes (1967)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d7e88eb60bcd9edad8f82bea96e0630451328bacc878878094bd589b476061. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/ARF106700135.
Hernan Figueroa Reyes Cronología - Todo un Triunfador (1967)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d2f250e1c45dfc131dd5ac0dd3de5a2aa294a39fe4839c4d9264042de0333f. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/ARF109901978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddd33e8cf7a40031e9aaf1698df6581fb0e950bdced137bf70136b2c42bed2e. 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/ARF109901985.
Hernan Figueroa Reyes Cronología - Hernan Figueroa Reyes (1968)
Hernan Figueroa Reyes Cronología - El Combate de San Lorenzo (1969)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23568bbb7113284187714a8e38e01c892acda85cd7227f973521730e7646fbfe. 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/ARF109901961.
Hernan Figueroa Reyes Cronología - Hernan Figueroa Reyes (1970)
Hernan Figueroa Reyes Cronología - Viva Güemes! (1971)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cbe33b6f74ee9cc2d468aa8d8b5882aefabe517f9e13b18cb3f1ea095be1d5. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/ARF107100159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7bf85828d6033adfe7ce2262d59050b128e439fa94ac4127efef85be2368735. 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/ARF107100160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4cf9eff9cddcff708aab37b9d2dda33ff1b4e4927e2de1f6e096fc6658f1d0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ARF107100161.
Hernan Figueroa Reyes Cronología - Folklore Argentino en América (1972)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21bdb4dc3779e92f7d1063fc7c8d08b9b61c97c941a5ce06d6f8fbc178a42dc. 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/ARF109901960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf01b40c7479d41897c74c2ab5d724dbffacf7094cd48bab8291fd0ddd1f0e93. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ARF109901973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b0a51a6c7342bae1f382e546a4db9af528473abe6cd829abd988be6407f652. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ARF109901983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6a126a7bbce0cf3002dca5d91c46a5cf24e664ecde4114d2d5fb82fe534399. 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/ARF109901984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52f7c3df251d93020a07c033c9569fc908815c5dc9e94552ac414c9f00c883b. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:42:48Z), 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/ARF109901966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850cf46671a125ff993130a4130ff25876050351efd54ea69c0bbba33aab38d1. 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/ARF109901968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c7b29cba5f579b8615498fdb2be27140688418c4752f9603d6a2b4749a8530. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/ARF109901976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb942182c9722aa6435494217c00d6648caca1151118104a5b15e627dcc899a6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ARF109902154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6927c4815c01535ace91ab70ee1f8b5d87b924872b5498cd1dabee2c6e06216f. 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/ARF109901963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5098538e16806cbf30e596ecd58a42692ff2d5df133cb34956ddb5021158205. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/ARF109903228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710513072ede5dcf46e04a492ffb52280474ebd388a87becad9603d87757214e. 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/ARF100400332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6c1903cf654a00a17c3d80d54ed5268849e4e722d5948ec7ba1495209af119. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ARF109901959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850cf46671a125ff993130a4130ff25876050351efd54ea69c0bbba33aab38d1. 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/ARF109901968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717166720f726a5f2028e8e59d226d82780acd5100f7ee75927d03b8ddc08cea. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/ARF109901972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91c6bd7a9a9e9b12a245315dee15ad7838743162887ac7635cf1bafefe5dcd8. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/ARF049600258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd256f4698ef8d31b18160faea9c5f6a249a33975165ccd879eae398482dd604a. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/ARF049500900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93980bf933c9a69f6460e6723e47f5db40ce38610a9bb597b9302915a67ab89d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ARF049600257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b45aa1ea8279ca9cec1ff3ee4fdfe7380c8e8d9a222fbc4300dc56e0c96b26. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:04:34Z), 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/ARF049500906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7655f5af6e1d2cbb966dbe5c3e08e435fe521538ce21719425a461b480b1aef9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:27:05Z), 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/ARF046500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6226d9252e288cbf40a9c12d679ed5e7537ccff695bb5534746231833bb0922. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ARF049500911.