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 0x8860c64f34616e013032472a7d90e97d03be5e4035b5d1576a2038133ed5ca06. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/263bc719-5cfc-4fa2-9eb3-ff0f7888c2b2.json and https://artists.proofprofile.net/proofs/artist/263bc719-5cfc-4fa2-9eb3-ff0f7888c2b2.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 0x334d2ebed8ee772c72e298100ba856d269bbcaf7c2d772381b9618fde18c75d5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DKPB71000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d54405be3b7accb3663b1b6f491f410e747098f38f090089746918e832e620. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DKAMG9403905.
Teaterkoncert - Come Together (af Cederholm & Brdr. Hellemann)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2473aeffebf8a03522fe3599e62fd68c51161bfebcb5fbc81dea3691ad1cf13. 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/DK4YA0903600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0097065d0e5f42b11c7df41bcec90466c08dc823e99367eddfdb512703772e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DK4YA0903602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c7756506c8b3ef1a81ef5778ee3a8d912a5e1b07b6fb448b7b8c62d24df285. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DK4YA0903607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a2cae54fb4a7ea9ac46632ea17274f644fb772f5454231e36c52db8c8fa070. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DK4YA0903612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5d9addf02f166c7777557b58c55c5ff2d0014ed195d93238465957a47d1c87. 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/DK4YA0903617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541920f3ef5147432cd028d7a00907490f7d01fbb60672fbca88c03bc325f503. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DKAMG9403901.
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 0xebb643dbc5f90228965ba7dac9c4df430b9e802b10d311e7330a12ae4309aff6. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DKAMG9403906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09dfe7f166ec9cabdcc9dd4caeed79d4d23fa249015e08bd86779ffc08545b1c. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DKAMG9403909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7193bc27aba4796f7901244ef4b368d1d88cc842eeb52cbf997fd58c8dcc899b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DKAMG9403915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88bf16e23f72094ff9242ba41497ea6ebe96095d3b8d3106225f20adf151ddd. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DKUM71700500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3877d789bd91581f696d518d1001be608a899a99b485208af3709379b1bcca5c. 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/DKUM71700504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06d40b25a168753ccdc1064631e678ec7486452d464a63976d4c59044b171ad. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DK4YA0903603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e97144f0da902503b1aa62227f542dc6baf433b81425c7bc0e8a9c7565c2690. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DK4YA0903606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b21121986eed00a0f4cc0e4b0d072a53be5f75f071d5a36efab1fff1933dda0. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DK4YA0903610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512960d7d16ebc5b2aa851e97dd313ae6667b90afe4c514d31e6d1c8ca892847. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DK4YA0903611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72c27d55c70ae8e539717544be3d8d491f1461378fc66918b95c8b4bdeb488f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DK4YA0903616.