thumb|Hungarian goulash in a traditional "bogrács" (cauldron) A cauldron (or a caldron) is a large pot or kettle used for cooking or boiling, typically over an open fire. It often features a lid, an
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 0xda0692fede859808cee6aef5a17f55b789430766ed3461f264317cdb83987406. 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/07ea5af9-e61f-40bf-bf66-4ecc945b1672.json and https://artists.proofprofile.net/proofs/artist/07ea5af9-e61f-40bf-bf66-4ecc945b1672.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 0x408e036502c52403eb7b893c2b575567653aff212210328f3c321987bdde3eb4. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBBPB0802553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ca0259ea7161ff1f9e43ca06685a483c762456f81bbeec36a124e1519bbca9. 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/GBBPB0802551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5c1948fc25c9c0625b30d255ac87956ece3d599322d2cfd59a55573001fdaa. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/GBBPB0802552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46dfe49f3cf801c5241b4fe4549d2022810563f0c050a34f9767440c7dc7eb7b. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/GBBPB0805246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14103f15d4a4efc5f386535579754ae6ce5726833bf54501325cd3bd1ae5f3e1. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/GBBPB0805248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8264fb472cf1baacf7cea2eb912dd7eacd294e56c1fe622ad8ad91d61fcf9972. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBBPB0805249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd8f85b93d074f7bb3a8820785309a5b4c63e4680682ef584b20262419de834. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/GBBPB1201684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf39909029a82839d918815b1718daa866b33e6fe32ab29a0a3c32c2d6150c6. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/GBBPB1201687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae226fcbbf344b898b726ed7171c443993d5b3dd99130eccafdd916b040cb71. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/GBBPB1201688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5819ccbf05d71a4633d8bd9b388beff87a4b09cc2bc73f750ca3397c3112a2. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZWFW2417701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be14d585275cd683b4d69ba07a13317377d0a8f53a60ab69ea50f8774f41716. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZWFW2417702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696459a8692273be7b372b4fb2b8e5cb2f6b722c8948bd3201efeaecca2ab8ff. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:51:23Z), 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/QZWFW2417703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b60ec781826da9ce9aa857039741c32e703ca6a032786e1e128074fb726aef. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZWFW2417704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6131698174b729eee5a5cc6a86e7d77c377cd3743cc7535a074d055e7e3b27c7. 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/CAFUE1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95005c58d3689a1624df64fc9e7bf5d1e031ad44689b749cd0ec9ea23e14d5c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CAFUE1800002.