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 0xd1496cdb011af0c10fc81e7f68f59f83ca0d72a5cd0144f2b35e82416b6de1e9. 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/800fcc52-d002-4c6b-af26-67be6c89996a.json and https://artists.proofprofile.net/proofs/artist/800fcc52-d002-4c6b-af26-67be6c89996a.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 0xcc68e926e7e276dd462d93451b92415bacda376465966af41fe43eb52f48061a. 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/SE6I32004435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d51151096d446ddc23c3e61b2a8cbac77658bc55e4ead0926a9a926d6ddd50. 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/SE6I32004439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde99fa90a4481da459ea7fde2dfafa4fd90e2765ce04d3b65b72c9fcfae9a46a. 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/SE5BU2126850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03b5cc236ebeb8d4cdd89f9840a30d0d97dee4a2d049c6e174ad6bc38fc88a6. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/SE6XW2127483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2328027b0ba11084e0b669ecbb9694c33d8dfcd6a91c1905eb4e05450704fc65. 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/SE6HN2181578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc98ab1b087488f92826899ffc57900307d1b54ec33f552346c8875f0f884d57. 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/SE6QE2143244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ed5f2a7bb37bd13838d7d7affa587922b4549f1f958166b34cf74c25202229. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/SE6XW2127485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1d468c6810442db4c451e3aacf422319bbe7463c176471f2840ac68d540792. 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/SE6XW2127488.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476ff12985139a203e234d78851eb564defeaec6e2de6c673937c0f7188d860e. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/SE5BU2223682.
Christmas Syndrome: LIVE på Södra Teatern
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7bab157f9771ae19d06553dc858c001c2ca6e82708f6b255dcfcf02084a2e2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE6I32457303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c65ca8540604f96cecca7d6841005f5fd74497c0188c5e1e2634c9b48595a98. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/SE6I32457305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c8b11008e73ebc7726543938371c9a24a3d1b12e35558aba5e3500ade49cad. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/SE6I32457306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f606955216116335922c17da5cfb27033e882d33fade9f89bb74e6fa30eb597. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SE6I32457308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944fab040e5bc7695bac2b884028f2a0edce5da51cece812c47cb7e2db6c0ce4. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/SE6I32457311.