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 0x2a58893825e705be5539b4a716879bdd1c78fced1cd53efe2876f45a4252d375. 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/4225c054-4ed9-4227-ac94-2f7305883987.json and https://artists.proofprofile.net/proofs/artist/4225c054-4ed9-4227-ac94-2f7305883987.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 0x080ae6f4fedfccb8d64fdac0f90ec3f55f7bcf5804a9eeff498940ca2e655d23. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:32:32Z), 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/UST8K1824821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82b86fc1a245b1f330dca455690232d8ddc1099e3795d7ad534f22743f778a9. 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/QZFYZ2029007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbf36cb183c4ded2854b3a0b14386d476398a3ed22d8eb80de12290b7835137. 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/QZFYZ2029012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b058b3edf6b798c6f6d61c7d6333172a65860192bd8f6b1198e7c49690a9c2. 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/QZFYZ2029016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf860498c973f51d6328d1772a76103f5e49a8471614c77e556b2073c7703f05c. 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/QZNWR2057565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb938b75918964ede6b6149b99d997290a75034dde5b03a69ef8303c15d3b0c34. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:33:42Z), 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/QZNWR2057571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f4a081496bf83cd317e33a0172d95053256243aed3df24602b379378595229. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/QZNWQ2138300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8e178a5392a2cacc68d26c787b228f4d8bfb9ae66c4fc0417bdd69f2df1d92. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:23:29Z), 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/QZNWR2184203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1cc9cb1c408b1d4133e51c16b46fb7d136d14e7b6832b94f08c9e25a74c9cc. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZFYZ1934353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd87f33707146012c6f6b509ccc6d2952f221bd06126e52b4ae04ec6cfa8ac8d. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZDA81941180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0778da55af91a6d46068a099de04b1e072fcb238e2d81142b57c9c3efa3cc5a9. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:49:16Z), 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/QZNWR2184207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdd1cf1175d4e38d753b623f1e0d3ba2c1bdced640ed61380172b889523eb80. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:33:57Z), 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/QZNWR2184210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e7149d12f05a0f3e500ee0f70601b24061d5e8bd13f83aa203715a26ae5a23. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZNWR2184211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71c8036faac6bb5077d85d5624455be234d8324a551463d7517d4b0ac97f5bb. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZNWR2184212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78bfd5852b4e792c3ca8efa190114a6db51e00d82cc20bd46fc0383a436e9b1. 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/QZNWS2126622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f763f5a4e89af0d1fa18ad20f3d11eeecd461cdb0463c1c679cdf5715037ad. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZRP52144442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf241904dc8b7cdebf0ac3da62eb5a8511fb08c42f1f03c1a46ef79ba9b6f3c58. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTVM2398464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32691f51c18e0d9a37bc7da074abd4539ca42b7e3393d19732a680734b74b3b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTVM2398465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba13392d3b2e006bfa1df91fd187e11b834a7e530a0ef91dd0a679ffbf332b4. 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/QZTVM2398468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a42e07a9873acdfdb051de3146aab8d6d4ea93e54da581cb86dc97da2d81e8d. 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/QZTVM2398469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29957432149ba397183d89a860d93fee84c7815b1d0bb9782484c8072c8935e3. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTVM2398474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abe5e1c176d18b11b44a380b737c1b6fc77724ee6a579234e5c8b81b747847d. 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/QZTVM2398475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112aa52fab6a42f55ea1b02ff1d4c19613c7a4a00684bf8470dcf9d7066f9848. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTVM2398476.