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 0x5703ab6356dc66742dbbd76c1daa165ba916b57ae4ed5187e80cd1d302279402. 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/5b8aab99-d0d8-4adf-be44-4e716d55970d.json and https://artists.proofprofile.net/proofs/artist/5b8aab99-d0d8-4adf-be44-4e716d55970d.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 0xd87341895197065547f7155797f7c63843bdec0abe176e310e26957439f8a361. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/IQA012001924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8b8bceca6b2877c7b87576dbcc0632ee7b01522e1056eeb694edcbe5f367e2. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:29:09Z), 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/IQA012002010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e3523ba9be7abce4edcf9970363704b582941702f3694a909928e258dfc27e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/IQA012002005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4924e64cb141418271de7d2d4eb7a07f1f3c148359afc6c0126861154522368. 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/IQA012002006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfc2471d8375f277d50ff8efd4b5906c6b1f95ff598bad9e4193a8aaf80d093. 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/IQA012002003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc671ac065fc7dc5fa385b467c6f81acd88df5d4949e8cc1536c001830edf859. 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/IQA012002069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f75d88c56c675e141bd478096c9ac37e85e8caba8966a15160ac00ccfce96e0. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/IQA012002060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69e73d6064fa06ca24e8962d78d143c204c93f2ea6b19b4c796b9fc9bd586f1. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/IQA012002072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1904f9f88f7464207da1ab9e75f88b1243c8e4d6e77c66e3a85275a45dc19c56. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/IQA012002076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d65eec491e93e146503036383243c3f9844a4e0d54aed825885555d2dd36aa8. 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/IQA012002098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20f698906eabe9085a16f961fbddf89adef9fbc840fc08b5017dab16e875dd3. 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/IQA012002087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c152683dd868e3ea44616e2fcc1b8b1bd51bd0de54e89b2fb8ed7b27dac6ad. 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/IQA012002091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a1c8d392734a2934f3116f0a7d472fc3879096c77b140a63143d1e786af5dd. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:29:00Z), 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/IQA012002112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb957b6d2874c35b8cc489e0645b3422278fdd0f8e72d7c0639dc0dbdf2d133cc. 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/IQA012002090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196d842773223269447eea00b83ffd29aa9509dece446832f2e3b8976992adb4. 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/IQA012002109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dbdec71dc47e2dec01f197da15183f5dc31b07faf93d92681768988f21b7d0. 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/IQA012002092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3d412f4cf83baf361645b1c34b5886b2fe053bbc95f1d24cd3e71cda7f40de. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:25:02Z), 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/IQA012002101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780ebbce07205fe8f6a9ab48716ed816b14a4ee5df45a99677377e319f8121b5. 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/IQA012002107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa256326ffd107b9d8eba515659bafe60a72c47b7ca4ca4dd9c973eccc0f2f7a5. 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/IQA012002097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196613148d4db6cec345b58d981a6031ca08c59cc76c4e0f2b0c45ef34345fa9. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/IQA012002105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e9f90d0775845abc8143796be7bda2f9307fefee5843ffc70e2c0afea2e254. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/IQA012002089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f74baca73ec6d7e6df1b6db4ed01581a9e999e824a283a12c54ea4ca17688b. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/IQA012002096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b70df90a95e81f8f3d40ad4a33ea941529cc33fa936aeaba4bdabaa80c5b9ec. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/IQA012002099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b99659731621a5461c15984776c8604243f13c08b8d43891eac6c860312c02. 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/IQA012002095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082c426ec2845ed465672e486cacdf3bf747450d457ee62d9bf3a2a0f7e3879f. 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/IQA012002125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2a9d81eead1a0357ccacba1749890f0b3586539650b6deace96f6bac618798. 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/IQA012002144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4c46c77d80622c31970a9fe119aa62af148e192914db0aee40d13a15cc1a75. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/IQA012002141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fa4d7436082d56439272eb865ba2b90872e2e6497e2078450eb7f3a1bb950d. 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/IQA012002142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388098e3e1cc1bb0a2e713d57813a2e4621c99e0753cd3be4e11617e0965c80d. 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/IQA012002304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066099c6440cfa82374d19faaee33fcbb12ca44b6797ec786cc3772fb2811f0a. 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/IQA012003343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae1df041837d7956c3bb3d591442f4ebcea53c132b23bf7eda0c9b1a62a6381b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:51:33Z), 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/IQA012003344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ba0ea8afbe68294cf0bb8cbe4e1e244f3983f54cfc98ccbfd476c5d1c6f90e. 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/IQA012002143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d734a6edba8e230a6aaa8e4ce5fb83a61462c603b1041fa9f8163f80b7a389. 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/IQA012004785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8906d7f96deeda555ab6899193ed737379c5d246f5e6b356cbd03e43cf3f081. 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/IQA012005206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bea8c6098e620cf14d13929efe5ddaa3adc7a36400a3842e9aa0882ee821a4. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:21:28Z), 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/IQA012005208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59ae3fb064c54602b3fd59f93135eb5acc6748858ae87cc04f95f02b7d1ab33. 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/IQA012006853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a816a87aa7f6c332e6a1ce0c5a010d9bd723841cd3fddf3b71e45b98c2af342. 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/IQA012006855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe879c93343e2115250d2a17319931da64b24423b6e4889136500c109e8ecab6f. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/IQA012006852.