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 0xd54843861266805ff073f6e870afc3958650387e7d56c7c074076cbb30a1a053. 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/0fdfbcc8-ab57-46b3-94b8-5fb8e422f169.json and https://artists.proofprofile.net/proofs/artist/0fdfbcc8-ab57-46b3-94b8-5fb8e422f169.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 0x5ac786bae74520faa4f6ec8a6acfb06e9cec1861e54c301afb138b8c4bbe46d5. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/NLRZ89300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d6fcf6d8d9092e50f031a8a42ae41ce753fac8de6c91af7444e581a88d4d36. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/NLRZ89300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78d41be525cbfc0db9cd2e9a7cafaa5cc8e8d0e3e7c8714a1ff972d71b2b4b3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLRZ89300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0917bc1b2c1e6574a0499fada869179b2cf2de1a0fc5a583d8609d1c34d0d25e. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/NLRZ89300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda8e7190b03281e9847190ff2d695c7feec86b0a8d4bc668f4b5a8edc61d4d1. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/NLRZ89300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e7fb8a4ad7ada1d63c6c065d8ad0539ffd39dc0aa3efba4e8d8cdda198dbb3. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/NLRZ89300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa245c779cf80513b00c618613c733aee7bb8dd2d5fb91fbfed33a5db52840bdb. 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/NLRZ89300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bbb0738ebdf33e84988d2a41663d27ff6feab391e5808eb681f43ec23ebe65. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/NLRZ89300044.
Liever Een Mus In De Haand, As Een Doev' Op Het Dak
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222cd8f9d916fd903e8eeca10641241d1d5c7789ee5486553087a80fec7b9b26. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/NLRZ89700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8e8063033885f5bcb9fa03d61454bcd0434a2969455428a0e5df17c39293e4. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/NLRZ89900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403b933829153da1350d2f8fa1393cfb20cd57060988c53247071972c9e9674c. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/NLRZ89900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f18ff8740550b0065839ee8964d0ee84994cb37d60ae5cd6aa288cdb742b0d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/NLRZ80100030.
Dat Gaat Naar Den Bosch Toe (Zoete Lieve Gerritje)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd076467b034257886337b2e04eae8a0674e1c8f0e2e7bd762043b6c6f69aae. 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/NLRZ80100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4260c95baecfff1868c4fc1a5ede4ae44134f9c1961d94d1671a7aab6abcf552. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLRZ80100049.
Vlinder Van 20 Lentes: 20 Jaar Duo Karst
Vlinder Van 20 Lentes - 20 Jaar Duo Karst