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 0x6c5d459f52cadbf31915bda42fb8332d7265d7c6c07b02758e20a2fc797e2a07. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ccfab82-79f7-4fc9-8067-78b9f60a5549.json and https://artists.proofprofile.net/proofs/artist/7ccfab82-79f7-4fc9-8067-78b9f60a5549.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 0xd6e6b5f6455921a1763417655fee267787009ce26d4f4863efb5ed47361a1ef2. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/NLZ7B2000064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36e5e5875d1710c50c8694ae97c904a3d3302b8430904680909aeba5b6d2c87. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/NLZ7B2000068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c2bf71c47349b09e8cd4039bd397cb37aaa61d2f398155b956e1d2ce544e4c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLZ7B2000073.
HOEZO RIJBEWIJS? JE ZIET TOCH DAT IK KAN RIJE
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa924a7f8bae84c7f5336e91af787f16b0eaa3ea2ba532a83ce2270ad68be758b. 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/NLZ7B2000076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c54ff8fe93ab883dd6b08b10536c52f19e0a749e9912371c9454ecf0a84911. 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/NLZ7B2000077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdafe996657a4361c6d83ba2a8896e52d686765864024553d7aec1504a98925. 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/NLZ7B2000078.
DE OVERHEID NAAIT SEKSWERKERS (ZONDER CONSENT)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0998b97153f587aadbb9ab2525637abcd2b8c9611ec310a6c2ce9f43657c9b. 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/NLZ7B2000107.
DE TABAKSINDUSTRIE KAN DE KANKER KRIJGEN
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f02f99599abe94139c7dad89d00e5942e45dd9ca4b22bf1ffbbb6a817bc2d65. 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/NLZ7B2000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589c9f859a5916539d42d83b0b5fd857ed94b16c4f4c5315b23ca7087485ed61. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/NLZ7B2000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ef6e15b4aa56f4df8c137d9d6e941a61d0e6dc8bf848ab49e24a4f921a768f. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/NLZ7B2000113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ee472907b3ebb7c10a6d424e44b43fe6182b268bcb3991e012accb2e3ba7f9. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/NLZ7B2000114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c8c27ff8fd162f6fbaadd7957d8905181356c753ac05169b8a8618a220559c. 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/NLZ7B2000115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcab2744e5d3dbbbc0b8544b4f805ea0b4cd3becf56de49e1a825970b38a2ad8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NLZ7B2000117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe336a3e3a4421f232a4f0b94a60f7b743b029fd3279782168b59af7108934fb. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:42:23Z), 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/NLZ7B2000118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581f9f8eedf691568745f7160404841d927e5a92c139ce7d09824ac39a9fbbd8. 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/NLZ7B2000119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d4d7234dc94330f3135661d8bd07f183e7ec0fa9ff5e51554dbe82c0fd32de. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/NLZ7B2000120.
KERST IS BEST OKAY ALS CULTUREEL WINTEREVENEMENT (MAAR MEER NIET)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0c4b664e1ccc4e055e7e8c0a2d142d235aac9a6a1af5e5174aa0f308c557d3. 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/NLZ7B2100130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55df43493f279cf3775cacb16dca3eec931516acad4d15588581d523549184e9. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/NLZ7B2100131.
JE HAAT GEEN MAANDAG, JE HAAT KAPITALISME
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c559c46a495fa12595637c443a8dbf370e0a214b20c0f9eb374c74feddfc64. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/NLZ7B2100150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a3ee01e51ed06dc7284a7c42e0313dd3e0f1d5270532a87b995246feee10a7. 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/NLZ7B2100151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f885720c1b98f526481507b6d7fa78b512065480cdb940dbb6ac519bf0151e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:45:32Z), 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/NLZ7B2100152.
JE HEBT ALLANG EEN KK GROTE CHIP IN JE ZAK
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01ebd17656df736e3b87e733d97c8c35695ab68cff4159bfbed07a900d2928e. 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/NLZ7B2100154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01be22bcb55eb2da3c5aaa4e34d34c51705732bb8ca06718fa4062562f572526. 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/NLZ7B2100161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f04d98c0a6d8a65fe77fc09f65b7984faee9f193d60dc73c36d7b14b5e197d. 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/NLZ7B2100163.
VROUWEN VERDIENEN OOK EEN KANS OM CORRUPTE LEIDERS TE ZIJN
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9962a0e325f1a62aef51cda5731daa212c8109904e088221cc2721c28a071744. 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/NLZ7B2100168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ffac300e5f81ac7d63b9e43afdc8c9cb490def2023372b17e42fd886c836b8. 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/NLZ7B2100169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb451492272ea18e84042c07da79f62411561e2bedb1e2bcd2f745ed88076f7. 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/NLZ7B2100184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4324daed13a3126bb31536e8a7ff5c3f44c74b8421d686b37878f0719f979f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLZ7B2200218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28305a38fd63813166522e20eda89dbd8957b84fdf0dc1029c7a151ec539be2. 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/NLZ7B2200265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802c07ae834249f8976d2cc9b22a8f98691135ae8597d99f9aa8a7618c2986ce. 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/NLZ7B2300276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aed334775a3403c7f054a2cfd0ae75ac7acbd78eeeb3a08d4e75d6c78732214. 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/NLZ7B2300277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291a71232f68bd1d7a44ff27d36dd39733da1ba11a2fb79112e63452b97a8f6a. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/NLZ7B2300279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b361387a5862b4e970c5f496e059d4cfee667bfc980b6748e2cc8298cd9f9d. 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/NLZ7B2300280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7d26d5714632f898ea3041c622139cf5cfa53f0c359fae403f8269654fbdb9. 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/NLZ7B2300281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f7ab5c50949540ff45de7c0a40fcc10926d2789a3d2ce8b9568d044b4b5606. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:58:16Z), 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/NLZ7B2300373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57eb988ed53677692c2f4473c1b3c50eb1779fbbf44e25b342006c9b468fd552. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLZ7B2300322.