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 0xba4b1f96d158ac93628581918cb5e1f5fd923f71be820567c8c75565d9fb6764. 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/e46e31ce-a538-4f13-8fdf-c79c4d4d9324.json and https://artists.proofprofile.net/proofs/artist/e46e31ce-a538-4f13-8fdf-c79c4d4d9324.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 0x2f36289b451c64171e33c6f0955562ef0546c77c9f17ec4ba20174e6b0fd3727. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZTB52441639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2902071d4687f97b3f4133e2b170654c5ce85e325afd0db66755555eed0f0347. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZTB82489752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53f13732cc76a196e10dcb271a5294ddefc74bd50a05ba5141296164a0a29f9. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZTB82489753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596caf34dc219142a3da411ce8e8af8566a7d96d980490ce1ca412c14818d440. 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/QZTB82489754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2397cf14945b77a4bb84fb07004219e619aac926fb2e2879148a7d930d12cf08. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZTB82489755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f62b8c11c3c6bf80871c2d62d63bda4d7acb1c78cf9934019106c9a2349a1dd. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTBA2481384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3895e46bc468b7ebe21faaa698a63e34378dcdcf5dc39e19a897383d77795f1d. 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/QZWFN2462901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25787d673f5bd2c8c6a40b111cc6c254aef06fee9fb71ca0b938d6951ae6b40c. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZWFW2408496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dd24bad32f8af2c63aeed363a4e0f8479c6452fba9edd3dd88426ce903a1f4. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZZ7P2477213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7587e02504e6503015d952fdd57a40fb5bb5b7f5d731530d69177fafed83ee. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/QZZ7T2489557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80e17a2acde99ab85d34a17f42437e640bd4923e5698856d36a48696d08df90. 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/QZDA42577195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f93e78df16611ab91b3dc03a5b13803bf0c6d2bd18d958ce81b46813613c6c5. 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/QZDA82512333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402dbe71b3ab90f564b9ecb139d9801e710f60eab7fa2a9086b95dc080cb347f. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T02:45:12Z), 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/QZES72510889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492c15565a73bb952d2bbb1a25b88ed88f69188f58dd3d910fcaa6407a5f6755. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZHN92520128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de1f35dc5fce2f6c8a31b5bb5a0e80bbf295071e311c9871a3232049e2c420a. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZK6M2532877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2f83ef56b74cac8874ae9503a52c1ef35140f1a6b3ea3dbcd367f4fa3a611c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:43:44Z), 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/QZMEM2550829.