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 0x21935d9943063a6ec5e5202c30fce9704c0f270d3614549770c5018f99d77d40. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbbcfb80-7e91-41ef-962b-e4fc6dfa41c3.json and https://artists.proofprofile.net/proofs/artist/cbbcfb80-7e91-41ef-962b-e4fc6dfa41c3.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 0xca35f298745f120125d06b10ef534e658fc9b78b7e3f2ad5ff2d9e8a3c91f6a1. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:03:40Z), 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/DEPI82440622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44c4c9a7bcd02280cc97a22aeb9f0134437aa1fe57a4da327ef21f49461540c. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/DEPI82440623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3ca06be19550dabb97b7c8cd0b64187e5e665ad1b537107c2a85f72147e980. 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/DEPI82440624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e818c7926eb658fc97777c677740c04283d5d9c1da240003f9b0c65022c8f1. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/DEPI82440625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c54425c4d0198cd1ba650580e01f9edb07d6a4d4fdd77bc8c9efb22cf5e26fb. 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/DEPI82440626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940417d2d5361fda4d67c0d03b0edf861fba1aed6bfe25c3897595d6d376ecb7. 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/DEPI82440627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039ba05f769466511d0a3d15566c2b15b9daf3c579ee1c37d4b8b06dc68e4201. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/DEPI82440629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f253fd7e155ef14b039974f63dfb46f6e91317e968b824443a08b14663557bc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:56:53Z), 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/DEPI82440630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1be24d558835f1f7a637510004f4732852ad2ccdbcbb53ec50e8d4a1012dd54. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:29:35Z), 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/DEPI82440631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4733c633a25fe6862ecc5243d55bb32374e1f1d56c007e4981e63e4dd7590d5e. 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/DEPI82440632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9c1002296d4c7e48d88ffd3101ba90c96e8cfe17a6b6e149da1ceca25615a1. 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/DEPI82440649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d72bd3c72d2ca74347bd787eca1875d4424ef85eb133d5919786aee1c75a799. 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/DEPI82440648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473443c38e119456273a0ed310390a2e150a69dcd7cebf2ef4cfb06ad2c62d3b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEPI82440643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9c7c63cbe45f613566729da8d091b6f17c69525450466bfd6c3630045f75ff. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:56:56Z), 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/DEPI82440638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009f8395dd7a103fd61eb2aae2841a4bdbd59b2fcac34c8f87fc3df03129b88e. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/DEPI82440640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e8b0771f68c703a0224326e4daa8329995a8ae74f453a5ec1cf8d30d7742a4. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:42:27Z), 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/DEPI82440637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2382709b95b9de2c59dfcdfae75b46fc6aacaec35f85fb7894b1f41c9d46c1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:33:53Z), 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/DE1QW2500898.