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 0x057f91942fcc71732efbcd016d23cf4e34b48b231b5f03aeb36ce4853334b36e. 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/d72d8bc4-0b57-4441-9f1f-ab6c5ec68697.json and https://artists.proofprofile.net/proofs/artist/d72d8bc4-0b57-4441-9f1f-ab6c5ec68697.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 0xeedaea91935e8272a45eedf36e7472b211ba1ed445fcf0ce84ec240f457cdc81. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLG620573783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0fa82994bb0c8134d79e28fd1f508cee1555a1900af07f604af96ba84f3860. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLG620573784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a3be987a1378f9d285a07c288bd5925903fd4a02d286480c310be1ef877040. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:45:46Z), 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/NLG620573785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205c018e4b5d05bc972d3b8624c73c40e070617dbd1c5e3a054d858010424fdd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLG620573786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f10c1464cabe7bf3d89d96ab3e70801b02b3ce31c4759d5982cba1142c7cc98. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLG620573787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4fb3c53bc15cdd9272432ceca05365869a95ca2b2ebdcfd9bd9ee1f177a4c6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLG620573788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7706bcebc2712a6846aee967040f36f979a61ad69e376145315359f7008f0e02. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLG620573789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13822972ef6979cae7e1b9367d3ddb596a167eec610ee655be6b090ddc8a23df. 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/NLG620573790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6772fc5cdd945bf08bc1f099dd7a208276a6578c641c7d29c1ca275901d2ea3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLG620573791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde320431ce0977ea62c052864f130d354388c6619786bb2ee552b097852842a7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLG620573792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb316fcfec7d93b9e43326bf1d1163298352ab2eefffd6c0a8f30a2c0ee949a52. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLG620573794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a70288cf4a77354d97879ffd0d4a0ae5883d76b7e8e22abd2fdee32ebdd09a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLG620573795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e001ee2e27716cc4d719bb75612c4dd6a7499a2282a0d31b034112a7760a71a. 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/NLG620573796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a9da9bf8c925d3205aad253854ba5cd1a6f5480d230f206598921962f1fef5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLG620573797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8337fb9d78de684250099c6a630266e4f197f6561f800e35e697e16cc45220. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/NLG620573793.
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
Wij prijzen U, God voor de komst van Uw Zoon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01f72d156409b466ad4de741e200531bda9a50ea40c6fc6cfbf31a052593ef8. 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/NLC350844210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae13ea6f23285d1c410009541d67c6f3b06d3535dca70e9abdbba81185e0998. 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/NLC350844215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec80e07394b60a9ec3ad09f0ff582fad8a139c4cdb0cfdbdd08c1e172d8b7654. 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/NLC351348122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e5e9c341e9bb9dbf96811791bb4c46680c694fe30dc8a05acc04ad9177c86a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLG620572754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c26aaea98accdc53534ba813c302ca07b14a0e452dec6c101b5ff22f1b1ada. 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/NLG620572755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccfdecac52cc63f84c34f0d80930a32ac52a171c3144191c00d0e07766f8d75. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:54:26Z), 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/NLG620572761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94eb28d8830744383b140411ef9a1e3b1ce0f112e9bd0313c50a826df3198b67. 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/NLCQ62342904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f65f541686cd98f731ce3b51bb6a7a4520911dab146e8f3337bd301588b038. 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/NLCQ62342909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489402f4efee45cc661f72b3828f12480a34b0b6bdf344e9064c833711c2b06d. 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/NLCQ62342910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a2ec0c1ead54ed4206fc0efe6457cfd09d3b79c0ff11b6db731eddc2594675. 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/NLCQ62342917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e44df2a9107df07dd9693c2690252115a621f171f2800bb0d8027e59d6b25a. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NLCQ62342901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfd165521511bc60e9c829a3e509b4eaf2bc28dd54b2f06420bd011056de89c. 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/NLCQ62342902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf06f3b7878ffc2fe4d5c6767f990dd5288c2e3d8d7393de565db2719a88a0eb7. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NLCQ62342903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f911506cc518efc41fd3c4cd865c05f73ba1a868f57a97e5a787da6db9050d. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/NLCQ62342905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fff6a33195cc185e7478a03a0503f161c51f4f1f68ca11c21fd55f8f567106e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLCQ62342906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2acf242f6ec09f65a00f4c8a77241aa0fea86f1d27ae2258ea144f363f8a547. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/NLCQ62342907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ee4b8439086e5f77ee0cef6571bb03f34cbf1a896f9d377678874ebb758386. 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/NLCQ62342908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4e3981f8e01f0993c5d7956917f89a4db6dbfb8b630e18c805808bfe977104. 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/NLCQ62342912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2e55ee4941beefcba9f49ea3f9caea89cde1679ef2182622a75c9aa9416ac1. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/NLCQ62342913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38770765f260e9e94c01c622cd350d252f37040249abf998fa8ed2cfd5f4cad5. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLCQ62342914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f65c3fd6969d321e3cb30804e88c70be4a640b1c42de95b24d82161420252e. 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/NLCQ62342915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37d1df80e35a2601699d105b051c863ae7c3f3c8515b96a088fee711b3c35e1. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/NLCQ62342916.