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 0x70c78176835782863650b3e304d62d425b607e15437200e0cf83125a832eb5f8. 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/c7519675-030c-46aa-b47f-69ad3ec76ec7.json and https://artists.proofprofile.net/proofs/artist/c7519675-030c-46aa-b47f-69ad3ec76ec7.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 0x87b902d04f515e2b928df598286ea3b12b0cce049888f463537bc50192682a08. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:38:57Z), 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/GBKPL1416021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534d4df495e919f573d2181312b174a9c20e42987f4c2c35e2287c02ffa9cae2. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBKPL1416024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0158149db86c473dbf868f5c8517ab7354555ac704c12a3fff6ef751bf89102. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBKPL1416047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf18a35b58348272d42e37b08183946744da6f7a0bbf8279dfe18a47e14e1ce0. 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/GBKPL1416049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb08c3085c533d92f5491e859b3603b787bf69800cddd5a9d9fd43963c8ac571. 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/GBKPL1416055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd41d5c03e88076f8a7ef29ad31f90e1ce5c6ee23e58a1dcdcd892bc95fbf392. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBKPL1416059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae4caa5dc831d326ab6c058c2c18a90f94caa8dad3560a9cdbae897c8e23115. 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/GBKPL1416060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024a2f8e9d8933d0d224187a15286b93e8f7a9dc1e6517b5110e34674e2bc31c. 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/GBKPL1416040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5f885c95a49f904230b3dd9475e8bcea34c9d02c6f8686478d6a49fa60c21c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBKPL1416042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e1324030beb2be94c6e4be0f583728b9bf4656ddf64ebc070fb705ce2fa52c. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GBKPL1415932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29b2e3031f1979c58df3074c0569788433e252c06b0e2823ef8715776f74b90. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/GBKPL1415933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bacb3aba01a4275f5dd13f9ff82c160ec635c5b558eca292d2548975ac16404. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/GBKPL1415935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e01369833b67efe5535eb6030425eaf7a0442cc532e3a525b6ac8240594f4de. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:21:28Z), 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/GBKPL1415943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4668da1ef2f49b270f60795cfad37acc329bbcb11fadd42c33a874127739e7. 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/GBKPL1671610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f07092b5caab1e75970d7be5b8cf383799137d4bfee54a7895b70147ac0b250. 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/GBKPL1671602.
Door Dik En Dun: Nieuwe Liedjes voor Kinderen