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 0x41dfa9146df5308edd5643960f93ff0a831c29925dbc568885d1008e866c7f88. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/31f92208-14f3-4957-bcc5-e013aa5c8a43.json and https://artists.proofprofile.net/proofs/artist/31f92208-14f3-4957-bcc5-e013aa5c8a43.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 0x086dbf56df7ff445914fc8a3ecc23c80745ee635a5e237db764cdc72b8167977. 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/QZTAY2534584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f41840860a8a26b26e5e960deb2ff743cb3c76b0bc68fe77b888a675c3e18a0. 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/QZTAY2534539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4896fb8d3d88848d68903e698d44204880532eeff78842aea2641fee397fedf8. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZTAY2534559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda572f0c7c40516196626c315e970fe5ac01077a160f29d2c774bfdf29af4c10. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTAY2534557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783212aff42ac1214fbe8afae65538b7cbf7cfb3e73cb25cece397ab3a7e02b2. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTAY2534603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29fdb1dcbdcf0cbe1a738947783b2acf1dc666c29491e576a07f57534f6c6fc. 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/QZTAY2534589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e41dd3680e34ed2696aa40195725b8b97205a638e9ffd046a30146162902680. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTAY2534580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f312f79aefb8d084e161efe07a0586b1c9c6ba47ec9edb1cbe6fd22abe3b524. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTAY2569986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf760b71a2c5acb6533961202adaacc59463769cb111003a5c88cc42a7dd4d459. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZTAY2534558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf3e12179ec27684d42d929084c386f371e0657f1ede4f684463a3ca74863e1. 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/QZTAY2534581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17c3db6f688354d00ea2fdab79476b8e52382171de2e7aabb2389dc95921451. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZTAY2534628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8436215d328730e8d3fb70f5a88f08841197c32f59ac63d4c015ba3d0c3e3464. 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/QZTAY2534555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e63ef79fd0c74989bf6b44ba6d7d9315b4866c72e76c3eaa404b1481b36277. 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/QZTAY2534629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34513766ce8e30fdd00a55d61cf5f9b35bf6067e62825ad214e9809b48b4b97f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTAY2534630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf570a8f5de58af7cd8df8b1a84df30b15f54be1fb6ed24d4f33085f0d751ad57. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZTAY2534631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86c5d0bf396dff5f2abe464c5cb131e1cedd1427190ca0dc5e67abb1adfeb89. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZTAY2534632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11509a23f1a9a82a04146e7d3d862cfddce05103fc44ac8e9a31d401b9f4c349. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QZTAY2534582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a448eb151e185b266c6f5ad66e509357413204d8d735f106832e60ec36b2e0. 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/QZTAY2534551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa94093f7186aee4132d18f608f46b9a114072742ea2331a767d2248b2119a0. 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/QZTAY2572117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3729fbb2f9cf601621e4904f69f24c8e5d208ed1a8a81a7b268c7804d7bd12. 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/QZTB52570640.
Connie en Ad Timmermans / Vergeten Groenten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0b64aea00517f0b0bfcabe035c722758a5e489e056697819959b43d7ce8377. 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/QZTB62565515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f2fa508c3076058a4d5029d39570b518a9ece55f3f98282d3fa90b1f66392e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB62567467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1d3ce9ee07f827bdc9fb5fb7343fc02041e6bc66eae5a2af95cfa8fc654075. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB62534882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44337d2ebfb0c82b86d861c9d1e39cceb940bcf6a050a1032d773f0335a16ea. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZTB62529055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c1fa414fa1dff02061322355c0614ccb07b24201f1ea1644ea230e1e67ddc0. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZTB62517997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebc2f261a7734e0b8a930d38d714d7c8fcb55c0fdac39c6ef8b57e8c548772c. 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/QZTB62527018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97afbfa6305d3e98cec276b73be1ef23eb39531d20aa96b19f1a028cc4a1abed. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTB72501973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddbdcdcb3149eb09192ccb4e31da7f7c4205689e9b546ba86c6f99069b2d635. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTB72510268.
Connie en Ad Timmermans / Groenteboer Hermans
Connie en Ad Timmermans / Allerlaatste Feestje
Bob Beune / Nachtbraker (HDFM Official Soundtrack)
Dr. Clyde & Mr. Bonnie / Jumping is not a Crime
De Kromme Spaken / Final_Final_CANCELLED
Bas Overzwaan / Geruchten (van Doofpot de Musical)