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 0xfc163815c4bda1207e39224e6c4a5a70809245723b449ed284fd3eca2e758a5b. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b7a3766-07f4-49e8-8e8a-7aa78ef35db1.json and https://artists.proofprofile.net/proofs/artist/7b7a3766-07f4-49e8-8e8a-7aa78ef35db1.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 0x50bd2d6d61fedc538858f9b99425ee6a1eccc58f3092d4505e8b1b61184c47cb. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:38:56Z), 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/DEZN82369412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7accda9dfaa006fa4054cb09bd2669386b07a85819ba2bf9b0fe761444de27d6. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:47:10Z), 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/DEZN82369413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde16ddfaa9944dac0b31b6ad34e4a2f2887acc0ed05171a4d91adb6d67d4b06. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/GX4R52432585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311b132db3bdec0b5b3086437c1f3c19b448188f514db0ac958c35c715752ea2. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/GX4R52431469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0d23c583aaf034029a11cce169dd218eab428bd7078bfccb054a9ab7f03d3b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/MXA3V2409710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3717c90b55ba0911dd09d685225a4b09f1a160b80d7f5944a7779de06292c7. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/MXA3V2409711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc044812592a7afd8a5530ff279f537b01f26ff5c51962cfec2294786407ba4df. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:38:52Z), 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/MXA3V2410030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de669045c4140915228cad25b11a6d6e145bc71104cc39719729818f2e8cec4. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:04:30Z), 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/MXA3V2410031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7fe14934fc1b33d271914f0b18fdc8ff0a1784f03d7e1e23107a5e5adcc85a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/SE57V2408741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8356e30c39cddf204b5b57bf915ccb245bad09b654104809db70099d918b6fbe. 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/SE57V2408742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697aaf4dae5d4edb4b5c62e18dfaec4314520c748d20a583980813c5828db758. 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/MXA3V2435137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4075dddece7f7b466dcb428f6c673768fcde02aa9f3c70553a5d38da3bb4ecd6. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/MXA3V2435138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef9ad352896abdf45465a7f4e7cb66e72a6566174a792dc2bf5efcf1f335bee. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CAQOI2529207.