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 0xfbfa7547a38c624286c8f94156c5a58307ed3c8115211f25a6c82d39806350fb. 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/88be90e6-17a5-41c6-8659-a577fe3766d6.json and https://artists.proofprofile.net/proofs/artist/88be90e6-17a5-41c6-8659-a577fe3766d6.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 0x736ac395841dfd470a6c2cfc6aba1acc5f5b546826a140f0803412efbb6247a6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ESA012565166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f01a4b754aa6cf68fcd15043dae1634ab75310d13fbcbd916e9c9c3fa6b3f3. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/ESA012565163.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66152d5dcecf040b481c6948f2f09965fa733afddcba8487e5b357c7052e2fb. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ESA012565164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3f7c2f4d6a23925c72b1bdd2527d58234117a991b62170e518f7af4b531795. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ESA012565165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e258671d893e3b29ce8aa15f3b572e916d5ba0a8dc851a60ffa9092dd96370. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ESA012565168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04baf7c9a6f98eeae5f904d7b970fee6bd661bf0beaaf69356dd725c2b5637d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ESA012565169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10815d7a7f1e8cf5402d8377117c9c6f0669410a048fd2e7ecab87c8058c36a4. 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/ESA012565387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d9e9118b3ca13d23fa964d8df3c88dc68c19ea947527ed1a5ceab0cb4a5e87. 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/ESA012565388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737451c720964cc6fa4ac44acdd7563d4e49a1bab3f45bcbf1a472a543a1de39. 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/ESA012565389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b1a0c9c6761831c77d9ed587412ebada5347d07fed5bdccd1776ddd1c21cb1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ESA012565390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbe95f3faeb7b0b2d37c80ff8d22da65cd668aebc3a5f9899877a29fc41fee9. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ESA012565391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6238cc551882a3f82c2c4fdc5236adc5ddfb16431f93b39e2d750b677ae4f33. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:37:57Z), 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/ESA012565393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d11c16f180b76b10279fac15cc7f31352cc6b268d1f13ad48e9a0b9a9335ed2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ESA012565409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd04ea455718af56c68739538ae6f67161ded62bb2a8dec4525a36687fe41926. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ESA012565411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8e3e32304638cb9f0f02a95b752c28f377603225cfac126f4e41445dae7749. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ESA012565412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83ee53e0f9cae6247dc1a06d6db1f1b62a826a55aa352cab4679c5cafdeea1a. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:50:53Z), 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/ESA012565408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3580ce33b3100279d1a0bb9762f592cddfb72f0836c1f3fcb05b6fde7e58317b. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ESA012565410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb6459460aa4ab86cfa5e5252e7db92371a51567394fc6d7bce298df579b40c. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/ESA012565413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4a87b52dd47a31e477c53b3e0613cde0be35caa822d5e0d982137efa53fa50. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ESA012565414.