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 0x6f7280410d6ec12bcdd13fe5c944c3799860ef005b48bb5de5736ab86ad20e25. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8db7fba6-1948-43c8-becb-f7e98ebc8ea8.json and https://artists.proofprofile.net/proofs/artist/8db7fba6-1948-43c8-becb-f7e98ebc8ea8.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 0x54f1f6f6f12c48d4f427420e8a5ece6bef382582d6ef9bbd8ad92c0b322dcb74. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:49:02Z), 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/AUGBT2540943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98088ad1de1770d3ccd74a73bbd63d776d472d2e12aaa994fa98f16e967acae. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:32:44Z), 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/AUGBT2540944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b0ec6baa8846da47870bc53703f43e06f34c0378c8004807990dd87bfbe072. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/AUGBT2540945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60bf30399eb4680239e0aaf41b036362a699b91435ae6183ba59f16a6dadaec. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/AUGBT2540946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb528d5998c5ebe93ee2f98a4823b4c658327a36534b7a7bac3a02b8ed287aef6. 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/AUGBT2540947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb823adb004c3ad27868edbb668629a8ad78d05bd68687196c29b41c3e8a5bcdc. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:05:59Z), 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/AUGBT2540949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8fc7eccf8ed18afb2911f0d8c19eb2f71f2428e752df5309392688f7bc82d2. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/AUGBT2540950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d479bce2f97bb142a4be6be854fbc1f37db01bb0eeb7c92f228fa940a317237. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/AUGBT2540952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63a97082b2906b3d3f4ee6fee9fd57951a6702db4f4841b6cd7e18d56b56a86. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/AUGBT2540953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc644e38d0b04a3a2c7657cb3905a782d486b46e16d5b6cc5ac8458a09e4dec. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:07:34Z), 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/AUGBT2540954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd461bd0f82bfd543582682e39a274a39f4a882a59d083d65a8c3fd4fd9d1e018. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:54:29Z), 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/AUGBT2540955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2488bbae64906d7d3883865576e53c335f7960a060fa5072aa4abab791a8960. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:34:03Z), 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/AUGBT2540957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bb3c310111e9e37d8a97afd2815949008fdb8f4bcbaf1f45bfd0768f99caec. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:10:20Z), 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/AUGBT2540959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5756349292cc162dfa0865a7bf1a743389af5791ee82144eb659fdb4ad2c27. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/AUGBT2540960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09ec4834e421d7d202d0af2c6c3e73ccefcaa3927efc1ae162e2ecf2eb2928a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/AUGBT2540961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e6c3fa2e746fd14eb071fe1b4301ffc8cecd4b7b012d4fae88d4a1ff953f21. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:27:27Z), 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/AUGBT2540964.