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 0x6c9b200bc50b87802bee5c946ab101e9c603acb100dcc16fb59339af223afd2d. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d769d8b1-2073-4a61-8c8f-8946aeb550e0.json and https://artists.proofprofile.net/proofs/artist/d769d8b1-2073-4a61-8c8f-8946aeb550e0.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 0x950f0c44052a5454a335f88b17cefd0448fcd7ec1eccb31d9f50642f9c3096ab. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:08:34Z), 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/SEBFO7209010.
På begäran Violen från Flen och andra visor av Ulf Peder Olrog
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56472989e80f83ce9533a535add476aac2da5826b4820047d1b54e3f8a563464. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SEVKP2101001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb49f7652b7df2bd58c5a4faaaf39748a2462f6fd4a63358754efb7a9c391f35a. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/SEBFO8114010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c44500284b4b46c70318d27732be1535623b4747ba5924a776c7c1f9dac3df. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:21:33Z), 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/SEBFO8114020.
Stora snapsvise - 99 snapsvisor - för jul, midsommar & kräftskiva
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b62cf13d15f71275624ec1ecdd78694b67c61625e44250239d5fc4374509cd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEAMA9563360.