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 0x847b65db6076c02b2403d5803cc1d5bf613e2103feb13d1d8bb4e965cfb173ae. 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/c5e5bd4e-b8b2-4f4b-8a47-b1414d16da3d.json and https://artists.proofprofile.net/proofs/artist/c5e5bd4e-b8b2-4f4b-8a47-b1414d16da3d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tri boje zvuka (Live at RTS Studio 8, 2016)
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 0x6238299699f0677cc01b07d3c50793785c0585e48d34fa11aeba5545b1367a25. 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/HRA041992255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3051a0f000bf80c2d9c91ac1bcc39282e8a21b5d739945b83afddff10059181. 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/HRA041992258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b6ad6b3e73647baa1349602010c253bec96d96291e41457e511b529d2a2152. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/HRA041992263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd593cd2635c85587a20a7211b49fd840fef248de1b6eaaba9e1912360dedc6b4. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/HRA041992264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd8c509476cf74d2f91064577cf858b883376fa9e87a5a38ae1092f66f1d5ec. 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/HRA041992243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc745d204b46c36132ac9f3fbeb84fdcd8cdfb2532285eeaf504e878073987336. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/HRA041992245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030d4d0819557a69bc099b6d339b181873ffc1a1073b4c3120d272457f41e4b2. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/HRA041992247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74555b64db1cb999422a9ece797f2bb32187d19bdb11bcff569439c2c2ac8ac8. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/HRA041992250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d27e182302c3f9ead9f967dd0d92ca2b889392143ba0882dff22c06db537600. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/HRA041992328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958483b29c03551f040cc5b71de0c003737462e9c22f923d6f51161138c01daf. 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/HRA041992329.
Tri boje zvuka (Live at RTS Studio 8, 2020)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f3fa0bf584fcb457a23a176dd112d5b6c50f4efa6f236fd5191e0f284d1efc. 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/HRA042101575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6babe2062977f9ed5f016002ce1c06ff22df8e7f33e6edd6dd7fe93dfd60fac. 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/HRA042203237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d2dd5c2e4e6da92a252750892560d7005528c233c8ac90e01026305f501583. 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/HRA042301556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccad2473dbae77d222ec70da19e35a7569e9dd03933ecdae69e63f6c2067df5f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/HRA042401215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5913b72091ae7ea2f8ded34fa0ce6d079bad9665a55b8e19e14e9c63b73de069. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/HRA041992330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c77286c43ed62b096026db12abc084c7910e782056db5862a3ae1cec075be4. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/HRA041992331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6babe2062977f9ed5f016002ce1c06ff22df8e7f33e6edd6dd7fe93dfd60fac. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/HRA042203237.