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 0x5e5cc8f9f4a4c85366af2635bc97569b90c298a814f77a6efa8f81493e3849a4. 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/519d70a2-a059-48df-a27c-42f11ada5619.json and https://artists.proofprofile.net/proofs/artist/519d70a2-a059-48df-a27c-42f11ada5619.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kindergarden I: Liedjes Uit De Kindergarden
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 0xdc6654be81f838e37882bf70557274597ca8cf44c3577e94b95b0f546095d24c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLA910200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1ef86e0c78d98dd616e8cfd470eea46bd46d670b74f21a860d82496b47f071. 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/NLA910200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b7142a8185c6ecc0a5a0597942875bbabd5a5e9a13d67bc5b9dd7018e01406. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/NLA910200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44745f6a4a52594862e6882c779f1440d0ed0510974fb4dde8c755397b11e7ab. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/NLA910200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f4035ff47c24cf221fdbb24496075654fcaf362663dc1129cdc31bc5de2cc4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLA910200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b386892855e4b89fab6ffe7d33c4af78c80dd0c40392e806d6947f7fa05d41. 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/NLA910200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcace653e65f5e70821713d2f2368ee1a716dff6b86b4b25a7bb4de35f230f939. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/NLA910200047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1957ddd97cf389775da68c6ca07946325326595d3890de818660a16ee9b271ea. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/NLA910200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd141742bd8a6657a153c5afb9a8e5f4ad9c8bd57aae15dbb2f23e27ca3accbb. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/NLA910200049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2debaa141c8ec183bdad8876b0ed17bfa33d93f9615ff70b87c43675c6e770c5. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/NLA910200052.
Kindergarden II: De Beesten Gaan Op Vakantie!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2430278ff0e22a7e945a72e90d6001777b93b64c7c5977230632c024f7bb438b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLA910500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2729593c5646bb59f069fdd0ac079d82bb97c8674b40cc8d8fe23902a83159dc. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NLA910500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca357fcaa39954ca0abbf9a6c45061cbe0d7a0ae6146b3da19351d6f7206b915. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:18:42Z), 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/NLA910500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19790797de97aa802a6bf57becb74488833931e524cf352928dd70ba40b23f81. 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/NLA910500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be6219cecd613aa9e435407e3d7e580ae07f0ea343cc418598d51cde7376a1a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLA910500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe69a3c544d80bcb9a0aa8f99a647abb72325ec0986b3f2afc9b829c1e4c9ff. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:56:19Z), 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/NLA910500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8abab5739b242ce557d17fa43a32fb5b9e7b2290850dc931e71ded6613e6e2. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/NLA910500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e95eae0938157e58bc7c7c50483c4ab3175f3600afd19e1b0dcb14c1166a765. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:44:35Z), 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/NLA910500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bc79b2c3316954caf6e6e61022e233e5ea30eb197e69a9a1c7f74c353c759b. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/NLA910500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb43734118ab6b0e353143d19a39b2d4651aab511b9ac1224c8d8f3651f8497b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLA910500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396ee0eb69083f8b5bd2ca2e1520549d7a0572c6e085b521ec3d04c8d78f4153. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/NLA910600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2e20d3bfc8ed120ed4e22bf0d75eb701bb70666c1f96871bcb4397b2615cd1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLA910600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58d992bc779ae280e5aa440f0c3faab2a09cf18d790255126842c94efc6121b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NLA910600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89908c1cabe352b54f9f33d834a22e2692456d8d3fa0a8bac3e18e2afdbf37ee. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLA910600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33821ed80cf6980ba08e49650e92246de0c0f2c92765580121dcc1c5706e258. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/NLA910600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe029e656be643399d2da06bd7d70236cbf23c6847e5f2b6832c6aba18705adec. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:26:52Z), 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/NLA911010133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912d60aa7403b784170f646dd83127a83a965339708874d01e8eff559696fac7. 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/NLA911010135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fb4daf55c45ac80bdc7b86f05979b3a4f8471c9e8e1024d2f814caaf663ae0. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/NLA911010137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadcb97f0b487233daf952fde79f04e8997c0cffd1238ab62712d3329643150a8. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:05:41Z), 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/NLA911010146.