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 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 0xcd8cb034f17918245a2d730db38317400ff72117bfb87a1eeac637ff75959361. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91a659f4-208c-4aab-ad99-6824295048d6.json and https://artists.proofprofile.net/proofs/artist/91a659f4-208c-4aab-ad99-6824295048d6.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 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 0x81d5c22dfc1b69bab4c5afbbe9b76dc50d337adc372a41fe98efb0a7049aa985. 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/HUAC60900450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ef8b437c0c2c257470d56b179fdeed01d5047864c74fa84fc17097a056a0ea. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/HUAC60900451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f03a59fe42fb4c5e3d2c73632d3ee3a3ea88f57171c9eb0acd3b29023a19517. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HUAC60900452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96167a71fa289593a17c5ddaa30864bc745b497b7b33c6176ff91810d23d1c67. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/HUAC60900453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fbd952f3914775d6e2dba116ae7c1658427a2115ae19ecd8298750953d5e1b. 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/HUAC60900454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c90d2bc3b31ac8ea349ca7080bbe9941fff5cad64fb7f801713e862a71c5b3. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/HUAC60900455.
Öreg Billy rock and roll-bandája - Live Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0861a31c0e187541a833e2df8ab0e5a8fcdbc8c638ce354cee8fdbf28ee1e962. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HUAC60900456.
A Nagy Generáció temetésére - Live Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe186272ed309924f4df224b9231b01db15bd72e74e53c43eb06a39853c400078. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/HUAC60900457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4806bab7d87f74fadc37ea1d9b3ae2b6647e2c08825718406ae56dafc949ca31. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/HUAC60900458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28e239e1f6ad22f9d204e8c5e94fc18d93f6172caab193ca18f16f9900c462a. 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/HUAC60900459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02e6af0f08a864faa17aa94301fbbe1f751c64858c6fe305418558c47a01735. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUAC60900460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa5a8802f53bff1411fe9410eea52330afa1df40d904d1705a301a2a0fcbe58. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HUAC60900461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a81d905c051158408111eacd4de48910ebc3d575640addd55a408cd66364dd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HUAC60900462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fa89f3ca0b28ab8f297c805690f8a4b3aa0aee3b997b003affde0028617af3. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/HUA371900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf803ac5e2f82a4d7629bfd5503a83dfeeb4c1b7a142122618ad1ae1d79f4de85. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HUA611603923.