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 0xfadb4b1040b179c984baf7cea7d8385136803e32f36e74b3bc617db9d0462eea. 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/ede75984-92a0-439f-ad03-d46142bf695f.json and https://artists.proofprofile.net/proofs/artist/ede75984-92a0-439f-ad03-d46142bf695f.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 0x312eefbf204a5152e244f5764c7d19a2162aeba31bb884970039cd77b54935fe. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/CZA110101005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdd03bce742589473e487e24394bef2f17e4329a89d68e82245718a8858334b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CZA110101010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c31b1507cb200ccfc14a827bf571a923a5742d5cb6b578133adf5e9205e059. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/CZA110101011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74edfe079547365ee8e85e56c67dc518a9b7af41f9dcec2a74f25975447ef441. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CZA110202002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ff7ee4b839b83da34ee8aa02cd081364f0395ff2bd9c2bf93e8e86e03edc91. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/CZA110202004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab28435930498fa627cbf0cde849774964e29651620380a1da4fe94c10f4c7b3. 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/CZA110202006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcec31d0e08aa67762eb0e61d58e7b489d3cd0d193f70e8e0b3dc181ef79818b. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/CZA110202007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed131e25f28029c5e14d12c564bda3d72fc4c7d499ef2f40ba1953150e2b9175. 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/CZA110202009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86143c87b5f02a95c2fca94c2035afa82b59b49a6db0080eb682f01acd96bb0. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/CZA110202010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c6f049c94a08e177bcf834e83d8e142a810e8ea55f27f5f9bacefbf6693f8a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:42:40Z), 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/CZA110202012.
Slavivi z Madridu (Le Rossignol Anglais)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92eae77c8d5e2436de5e82615ee1b997c33f84758813aa76dce031ae5452c4c2. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/CZA110202015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f14ae8540ec04f26606b503b7a9e02c80a8151c270c512829dd633738512171. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/CZA110301001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d215bb83f9b002dabe1514a20dd02a812c8af032775fb2b58d16189b2f23b1. 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/CZA110301002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161c17767b22f8e07b38ed0f0f6ad6496ecfb2c1bc0256ecd3278c49c49e1aa5. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:27:41Z), 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/CZA110301005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70acc86852fe14b26c7f1a8075380f4c20f0a016b94d365155df432d6f14a7cd. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:00:35Z), 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/CZA110301006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8dd5861a74625abbebf082073eda27e843c5fe02480d7d089e8b933f25b6407. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/CZUM70800361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2158295cf69a35f0a640b2f332266a6e300e1b8c6cc846ccf410d00bd6195c46. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/CZUM70800340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf12f53a5cf23d149c0813daafdbabcd08c0667044f1d6f6ca741547f736608e. 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/CZUM70800351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6e684f356447e550bd88303c8334770bf1e9e275b46beb5083ec6fe090aba8. 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/CZUM70800360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863bb75f14bf1c9480fd0b3bdbf0563857a2f0f1ab597e2b684aaea874226217. 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/CZUM70800359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe751a8892f8861954bbe8baff5066bfea4115d01159d236ee8db694b397eb880. 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/CZUM70800352.