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 0xb0a69352465a319f21cfabdcabd661f1f0a5644e48e5573b0425ee9444b1dba2. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8581806d-4fcc-44ac-b155-d80355a8a3a4.json and https://artists.proofprofile.net/proofs/artist/8581806d-4fcc-44ac-b155-d80355a8a3a4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Super Medleys (De allerbeste medleys uit het Swingpaleis... en meer!)
Swing Ding (Herkenningstune Swingpaleis)
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 0x8e2bb6bf2a3c50b3347c0351d5b3d564b29bb1995ec38b9b7823f0927bbc1f8b. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/BEK012100578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6589fd76cb426b2f8921706cf23e9e15a2fa0db7e1a271099408f9dfbe10f587. 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/BEK012100579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a0b32155bb0d274ab8b0b913b6ffcacc10f734239f0c1e4f02b0c33fff8517. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/BEK012100580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73aecaddb42b6fdbf82bf620f404e06c580211c3537f9d1b2bfdebef0aa905d1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BEK012100581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b4fb9e24225186f2599b4cb9619a71a69c398c6707bcb70960bec5c38e17c6. 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/BEK012100582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eea73c2495ac709f6ef69352f808f2be29bd01a48cfd11ba389156bfbec09c7. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BEK012100583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ca3c73e9b9f2ad1ded1eb8d9ea51f36c6e50a992ae762a7b27dd9e8c7e2d71. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/BEK012100584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fefdcdfcbaa34941f43ed5ad4e6785de4217a8428664c109715650aecdbe9a. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/BEK012100585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49259c1f5f45179c65bca6f62a24490708726e36ad0cdb979015b53e65a4622d. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/BEK012100586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608c4c06324d2a445f506544feb836618f4479321035b59177280cff18bd6888. 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/BEK012100587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba16a4d54925e0832fbef4661cdfb956d908345c460d0ab671e06479ab226936. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BEK012100589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73ca555e728e8fc0ab41624680f64120413b250042cba5726ad5bb8408395c1. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/BEK012100590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b362155244fe52bf0049231d2a67314ae7839469f22dc4b9bdf7bae0542912c. 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/BEK012100592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29da841f38f48bc91a66bc13d0a2ce519e9b860cba80dfc311ce10adb7b51984. 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/BEK012100593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbaa2d36ddfd95678d61f747fd7bb4760f23dce66dbe17692f0ddeaf2a05a410. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/BEK012100594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3637ebeae7ff85efcf4ad733c4a3558b3de34bd48cd5e77f602e3b8fb4ae6e8. 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/BEK012100598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0752b020d83b9a36c98903699b66e11750d2603d9b0094f2a7cf239fbb37805c. 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/BEK012100600.