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 0x5c0f2708505fa9e22574c6e91a200e7632e60e727cb63fbcf253cdd099d05c7c. 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/305fa9db-d1c4-4742-8ce5-677312f26a2c.json and https://artists.proofprofile.net/proofs/artist/305fa9db-d1c4-4742-8ce5-677312f26a2c.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 0x94962a9fbf27e700fadf10829ad5eac28d84722197a83dbca6df1ac1da061af2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USASN2000871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30df8c2c37db1d7f54e1d3cd57873408a2d562e504626f9d0229a2b3825c046. 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/USASN2000875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82289835eb5b93c2033ef4efae3d62b41b863f78425865e42a7be5ec8122381e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USASN2000893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d02f78c4959de05b4e48928a8d467121a1c953b8b5b8ab468389362e63ed4e. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:54:29Z), 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/USASN2100430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4383a4b32684b360cb9ae396b8161cdc2b605680d76bab4782ecb9dfa1b01b2f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USASN2100431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa571d67dd00f4b1be671ffb8be19c05609891eb98d8f39429a86131bfd0ce5e. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/USASN2100433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c466373597f943ae7efdd018a4cc4372baa0fd5bc9b8b7911163addc989b2b0. 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/USASN2100434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4961877921c5041827724ad9e5ca81ef04e5a25d9403054052bf7c43be79f58. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USASN2420022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0666d7e47ea8e541d10e3b5c4b4882d44ab85b6479f40193d440a0eedbdc4786. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USASN2420011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74a3a0988376e62f7cdf0a0f4c4d7ebf0e5b00e14c342c9ae9a45f09ed7dd54. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/USASN2420023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276f4c3c29473320d40cae5244fb0d5f57b15328ceb5d313d0be76544e5c4c51. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USASN2420012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3ddebce9db9daa4c2f56d97c6db98132ad0ba97e9f5a47970385bcb3d6c6cb. 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/USASN2420016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9779d958d37c1b9db86d7bc652b2c702b6b81409e70ddb90312a8ca2199022ab. 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/USASN2420017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17d9e41f50ce68dfbacb6cfdf4f98119d8de7fe05e4ed8d7a24fa65ce338e3a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:42:45Z), 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/USASN2420030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee282782fec500346bf2756dd1c1bfe5be0c2880d86810ce4e9aebc7b8091a2b. 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/USASN2420018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c27662de1001a9e2951078b111f0c132d71d6122f9a1869d3d6f047ba3c60fa. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/USASN2420019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2e61e5ca1feebcba5bc60a897d8a62541a39cada0f529bf423be842f67e821. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USASN2420031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50c7971b9e98a11b1426ab1fbad29509b1cded969c83350fc8d514b8bc97b90. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/USASN2420032.