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 0x271e018baef27d30fca0203a97f66c1df2856711e84504a3acb007dbd47f9316. 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/2633f909-2953-4491-98d5-2980ddd1d5ff.json and https://artists.proofprofile.net/proofs/artist/2633f909-2953-4491-98d5-2980ddd1d5ff.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 0x0be652ba89e5fa5bba86b0a0a6bc8e4b92c1e28b7504a5241fd525444aba237d. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/NLRZ89200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e84e2b33dce51378b64a7fbe4798dd9da8f1f9934e1bd763aa82267e41dd225. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/NLL530700223.
We zingen en we springen in`t Oranje rond (in de blote kont)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e26e2bdd1cb8ac0b781827994128804fcbba55301ab9efcbd536e8ea5e100a. 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/NLL531000494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ddec2a03397fe65bc345d40fe696cb143a3279015d3250d7f89235ef6d97a3e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/NLL531000495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caad7ebaaf7afc92ab8265643ef5d7afcb2f6a2ddc1074c9ca45aa76eb6b5e8. 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/NLW2R1706721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1616b316dea62e0dc5228ecfc8f72134e9321f3345388b8a95a08b1d1d5d13a4. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/NLL530900446.
Wie hef d’r zeepsop in mien flessie bier daon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee795df5bee5f03364b5b43db3eb9ca9ef69ee54a3ae847f9eb283da1871f61. 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/NLL530900451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60a7dcde657b011e1fd33df7154fa035452c290545d2664aaa06f54eca760ef. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/NLL530600199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694e8fc20fd99dfa5d36912ef81e3b6a427674552441a1510f88d5f77f3a035b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/NLL530800348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7206cbd511e04990f3a6cb1db829013ff564574b8b161d7d3971be37746a5b. 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/NLL530800350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8606995006eb0661947b1b47e05fafdfc7aa5e0a36e0379586098643623a755. 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/NLL530800351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f3c1acca56dee4cb8f2d19a764a8f861237211db87cf74a3609ab844def414. 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/NLL531100590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa326a4aa7f78ecc0120b6bebe07e779370d64faf92fec8950a38cdb21b03f8d8. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/NLL531100596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7494e32e4c66dfae29c10c01238d1d1a24bedde7bb64f3367af43cb7d8d93d36. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NLL531100597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7142eb24fdd53c65ec5ab031f51ba95718b4024039dd7b0a1a57f233de94429a. 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/NLL531200704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ede75ae719261c8a34b9b204e6683ace91bfbe45c9b502a08378548e317f5a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLL530600192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b451d2ce87654bdc71f976d41ab84623dfd4283bf8484e708a8e371ed629e61. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/NLL531200707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4203673898f07ab5dc9a6323bac197169fb58cdd3989ebb1c137f673671c27fb. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/NLL531200709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc501b474b275cf419809beab646c2deaaaab16229abf4fe3a2501b0f7ad42ed2. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/NLL531400805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70baaafbdec5b2b8242e6f654d094abe17bcb40a37ffa113d86888931c875c9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLL531400809.
Uut ut Noorden (samen met Syb v.d. Ploeg)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67ed69644b8a8565e4f77f6816798c4ea0750442f3630545659b6258f94194a. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/NLL531400811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ca6b39e68d7b9070d0e6b3ba6ae384f7edfedc84635a03c110faeb0cd08b11. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/NLL531400814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82e0528832cace595deea0253efe3921dd15f96ae333fe2eac288dfd2383190. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/NLL531600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bb156e633dce6aba0490ca021cad97f8e3891b3f3d6a3b09fc76fe98e8497d. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/NLL531600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b45f43915ca12445e11c29d9de99ac9bc7d217a583583b2bb5168d3edced78. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/NLL531600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a4ead7263c49c143cd19e6737a848e8cf4a0f93c9f4827847214ea2cbc29d0. 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/NLL531600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ddb00d964e9ab200a888ccc50fd8af049e3df69d7801a946de3e3461f7d519. 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/NLL531600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04906dd536e94467f01a5755ddc387004ee933c9def59d38f9d4f4af421fdedf. 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/NLL531800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce4845fc7c0b771da65d4dea51c008459d0e8e0ff578bdd37284eea455916bb. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/NLL530600077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0a1cf7b7490835e8296dd53c5e55a73e62df01a4ba3b1851704abc21fe5a50. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/NLL531100586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6814e6cb2ad315a5703cb2d8498574c8feeb37d54ddce445fac2c52e1d10ec0c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NLL530900448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98c137ae1ab694970009ad3e76f1a4fe0258aac91dde089e849e3d96cb0316b. 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/NLL531700067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ce4136d10e29ab6aa85aaa9afd9a25a067cf474743bbb9c37b040b786cea50. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/NLL530900432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe997a6f79eb0e1ff7454c704b62374abd9e35e80e9ee0083474ec4c83fdf6f93. 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/NLL531500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ede75ae719261c8a34b9b204e6683ace91bfbe45c9b502a08378548e317f5a. 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/NLL530600192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b49db4beac9debf239ae910e0eb3d9f97170a53352e2aaf082ecb73cfd7c768. 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/NLL530500078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a54d6bd38b7a0c2d1205f3016ee5bce95d30fe5dd665f93990eb21efdae82e. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/NLL532323015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22180b8b592f113abf1a3b2353226dde4c4803410099c550f5ae3b731fc3670a. Chain 2 (Bitcoin): anchored in block 957957 (2026-07-14T05:10:34Z), 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/NLL532400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7328ec2ef8987d8193929c8d8641f4331f43b591284835c36e63b31f056281ea. 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/NLL532400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a6835468933776014db61a7b2d8a72e1962eae825ec7a35ec38fcd6377cbda. 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/NLE870707701.