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 0x7d3b157c9f92ffa2bd056914ee23939d57f41d6e0c3eb136745292be046b5de5. 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/374ce56d-f5e6-40b7-a356-2ec4d769c643.json and https://artists.proofprofile.net/proofs/artist/374ce56d-f5e6-40b7-a356-2ec4d769c643.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 0x9171f7f068d7425d00c2e48c5e346f5170f1166e50eac72952f4a0ee79af6b1d. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/DEAR41632967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20502369eb813d5a2b245c877a08d860fb1ef6982b70ce24968091b3e3ff698f. 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/DEAR41632968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500c36dac7f7030a3fffa1b3fc419986626e85ce586c65e06766a8eed2ffdabc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEAR41632971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4952a141e47d1bb35e5205ac7631cbaa7ea065bbc22e51730c8d94e5ae3a3645. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/DEAR41632978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37494bd23690d5cd995020c152aa774a25dbbdf43eef129afe221854ddf289b2. 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/DEAR41639034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775c7fc59b74fc9571fa2ab28f512adbb4ce6b219cdd01c9ba6f071a49a2a139. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEAR41639036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd4ad1f7856f0939b110f4bbddfedce555f680ec6b5e21b788d8b97bb086920. 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/DEAR41639040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf2a40db7340729aeb7eee77742eb5f53f0630b437a593dcd5d32126ac006e6. 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/DEAR41639046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123a6e93d68b263c75c2fa86ddee24b6111e76c0e0190123cd939b7b25729ab1. 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/DEAR41639032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15da19a859d59704337571f559fa9d416a083280cb7a685c4a3a89a027973e3. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEAR41639033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37494bd23690d5cd995020c152aa774a25dbbdf43eef129afe221854ddf289b2. 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/DEAR41639034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c600d95bb9b620ab9fa873dea4b15f95b36c25c60141d3496856d7a643c919. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEAR41639035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775c7fc59b74fc9571fa2ab28f512adbb4ce6b219cdd01c9ba6f071a49a2a139. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEAR41639036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff119dcad0b3b2967ade8d09b67eb312a550ee13cb8fcc898ffdc929fdbb6b6. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEAR41639037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f65b90f2efb57814b484cf2fe20ccbee3c88340b838b8a5774ec944416cac2. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DEAR41639038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038be74b1eaa6465cc40955607a1c69f9da89200ca6abe075c6ae59c515f9d20. 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/DEAR41639039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd4ad1f7856f0939b110f4bbddfedce555f680ec6b5e21b788d8b97bb086920. 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/DEAR41639040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8630a920fa340482d4d5d4e217d8433a2f3b288ac2a4b0be2394ae43898842bc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEAR41639041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdd46df7fbeeaaf7225b1faed9c2631d625cca5bf5f976c0ccc1603f856ffe6. 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/DEAR41639042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ffbd67eb4a3203d730fd79d03a0d2ac08c19c6eb1091ca9ffef9c488ab3ed3. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEAR41639043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf398c061d024d2846f3ba23b7aa08c2a0757c63aec9881d12834b88ac8881b5a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEAR41639045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf2a40db7340729aeb7eee77742eb5f53f0630b437a593dcd5d32126ac006e6. 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/DEAR41639046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b468025169da6500b3022ad2a46b342254e6a2539dfb9bd06161256bfbdcff. 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/DEAR41639047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7934a6cba379d99eb9bdc46969762463bf900c04f098b2927b81313d58533e92. 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/DEAR41639048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba8ab903af9514d78481d0a58b2c5867a7d07764bbc805ea4fd1dd932121e52. 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/DEAR41639049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a6aaa1c3b8e61443acf7b19ffc6dadeb243353f6d8ff5fd1def232bc581ab0. 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/DEAR41639050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a3fa5ba8e219b65d58bd602d28f222821a36e499cc1f34c361567460595d8a. 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/DEAR41639051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3665cf057b40a57a1bbf961b2f7793ba1aebdcb03005e9006a3d4e0b18298b5b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEAR41639052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda71580d82d713b8c74d1c773c95c17ffbee07552a601a0dd19c8fcbe87a22c. 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/UST8K1867790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500c36dac7f7030a3fffa1b3fc419986626e85ce586c65e06766a8eed2ffdabc. 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/DEAR41632971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f52d33e09597c6433c0a9125aae22de1acdb0a9a68468b224d268956536cfb. 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/DEAR41632975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4952a141e47d1bb35e5205ac7631cbaa7ea065bbc22e51730c8d94e5ae3a3645. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEAR41632978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6054153f314b3baa0c5998a8535fb311d3344b0c2d1d7c1a72d448708cd0ecb3. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/NLM361800005.
Zonder Vertrouwen Is Er Ook Geen Verraad
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992648d583a23d1ae5e863159f689d7f30afe6eaeb2656e1719a986b911f930e. 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/NLM361800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fc5ffcc3c83d58b747bce1f52261196b34bb4d644f5b9fb1afec3f706dea50. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/NLM361800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef3979f98e58c89e8d186799e8dfb8240093624688da8c3803ade3dac79b60a. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/NLM361800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6588aa301ed8220a018c970a463f8796a8ab04b4907d2c1fb459cbf7525a2a53. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/NLM361800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05512865cd075b40526405e7874fe5d1b1e7575e7dae3510466eaa62eb337439. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/NLM361800016.