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 0x6c579e11edd291d501501de173d2efaa0114f669e1ce8648ddb027642ac4fcc4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a2c1ade-f22a-4b5d-9321-8d82c2e9d284.json and https://artists.proofprofile.net/proofs/artist/3a2c1ade-f22a-4b5d-9321-8d82c2e9d284.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 0x33b7e29ea7a90f36769ffe49c776d7cc01147119f6d738665a1f4b9edc8bfa84. 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/NLW2R1712463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3045a5e0683fa545cf342f2b24519aab48ee8ed55f341719347982c7d29dc952. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/NLW2R1926142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22aa82867ea9514fede394df3b3ae49d5174499603f3e646b21f05a3acebfde2. 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/NL2AG1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85ad98277e6080fb738153eb1480a847be7a36e21b4795bca0e5f1be735c6d1. 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/NL2AG1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e4a51a4261a94c705eb2ef48c069550d10b741fd4cb900aa5c54c548ef4a03. 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/NL2AG2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf74f9564b7e92efdd8cc63e254827d354807de52452f124207b101feaff084. 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/NL2AG2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4db24d490dfa6324c3ec2557b26effcf96b51dc3b16a94e92e265ef6fcb386. 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/NL2AG2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaceb5b434153e4456c35004edbb4e08e9c1f6e3ce281b541af98334b6081474c. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/NL2AG2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2db4858a2715a6b052254fdcc627a18b03de31b449e525fc50fc396c135a06. 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/NL2AG2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ffc6369a7e8b87b93fa87722f3d9b8bb1c5ae66af034daf2a421c6cbf20f7e6. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:44:47Z), 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/NL2AG2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc15657d4576364e461f982048890cac361b77259275ba3c652bc8cc179bff6. 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/NL2AG2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2db4858a2715a6b052254fdcc627a18b03de31b449e525fc50fc396c135a06. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NL2AG2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc326f9c2fafd9b29caef0c7a527d771e703b3d08a90e43bbb7f526d2fc819e17. 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/NL2AG2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4db24d490dfa6324c3ec2557b26effcf96b51dc3b16a94e92e265ef6fcb386. 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/NL2AG2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e4a51a4261a94c705eb2ef48c069550d10b741fd4cb900aa5c54c548ef4a03. 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/NL2AG2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf74f9564b7e92efdd8cc63e254827d354807de52452f124207b101feaff084. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NL2AG2000007.