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 0xa9ccf03623cad7330cd505a3e19f2ec36d71958a0af1b2d368b2230b9eb1e839. 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/aae1d9e8-583d-49db-a08a-2ac58458da7c.json and https://artists.proofprofile.net/proofs/artist/aae1d9e8-583d-49db-a08a-2ac58458da7c.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 0xd2ed535fa964b6c68a547fa890ec72807d8183a3132edf81efc86411b8598ed2. 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/US25L1900421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca45bbbb66c51a7c43616c1748bc909b93d18ff2fd572ec220672be87850e15. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US25L1900424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788f9442acb0db9ea7f43fa9db26f4e4acaad9047ece4971f29cf58773ddaf12. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US25L1900426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7e927354ccfff5e1ab936836e4ee16ee325bf4a8d931925f32933cc60c05f4. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/US25L1900427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85df5fb95b0e2ec054892211291d5f958590619aba63dd021b5307acf65f93db. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/US25L1900418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5bf0eb533c6627b0fe11cb45a0ddf4f2d3e023a72db019f88a605bd221a72a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US25L2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3735836e1e4379c4b06ef7a70c0bc221191913b700aca8bd75ec0036ebe1ae35. 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/US25L1900419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35bd20c341ad90c75133cf3e7c7024160e840842580253a2e1a5b65b6d3dad8. 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/US25L2100008.
Onze Schuilplaats Is God - Binnenkamersessies
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89467634c96941469c41f4d6a787a590b3c0879c559eb5e7b6371e13b0240c0. 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/US25L2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95df867195423fe6b1df923622808bcef1a7d5914c2d9c5e009aa6c7023f58d. 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/US25L1900420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ed535fa964b6c68a547fa890ec72807d8183a3132edf81efc86411b8598ed2. 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/US25L1900421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedae075a74d83b1dc05d2f8fbacf380f479b73f65bf4cca45aa56b403cc53e79. 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/US25L2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d959cf264a1e1e0d715494a3f86d8c89eae21d15f1be31bbde14cf18eb9263d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/US25L1900422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bd7b36263eb96552d4e52574b2fe86bd9096850d5cdb1eec880069b8aa5b67. 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/US25L2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a12eab838e0a8c8d59f6eb665ced491c28f67e1e26f36146dfeeb8ada39839a. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/US25L1900423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d050c6b7a97de3db6a4f0cecaf842af99c4dd522f4649a036874c7c5332180. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/US25L2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca45bbbb66c51a7c43616c1748bc909b93d18ff2fd572ec220672be87850e15. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/US25L1900424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a84d6849e1bf26907ddfcacfcdb6c40248f8f4156e43267fb7cad42e2027e5. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/US25L1900425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788f9442acb0db9ea7f43fa9db26f4e4acaad9047ece4971f29cf58773ddaf12. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/US25L1900426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7e927354ccfff5e1ab936836e4ee16ee325bf4a8d931925f32933cc60c05f4. 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/US25L1900427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a24c6a6b7a790668cfebd0320b3569a0651417aee594636bdb586d6295e6fe1. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/US25L1900428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f624bb85ed3f9a8fbf2837d7564cb043710b6e9fc882a8b8467e32b691b6d7e. 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/US25L1900429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5bf0eb533c6627b0fe11cb45a0ddf4f2d3e023a72db019f88a605bd221a72a. 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/US25L2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35bd20c341ad90c75133cf3e7c7024160e840842580253a2e1a5b65b6d3dad8. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/US25L2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedae075a74d83b1dc05d2f8fbacf380f479b73f65bf4cca45aa56b403cc53e79. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/US25L2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bd7b36263eb96552d4e52574b2fe86bd9096850d5cdb1eec880069b8aa5b67. 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/US25L2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7b6b697cc32d958147928b0fcd361af044cb983760a40066b4ff0d05d04c99. 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/US25L2200455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3875e8fe8eff0673608eb87c595c6c99025be30c5ff3cd7b732687ab38cfc36e. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/US25L2200456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718138169a6e3a6339a82d6b1eeeee7f66761b4ff9a312667edf829c47024ae4. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/US25L2300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d9b5be8797751da5e9641ddca43dcc95e04d4aca1172e647a96745bd2c4dfd. 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/US25L2300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b3e3e228e2478e5294dce5948fb5105eaa946e636aba31d6e197ffd2d57abc. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/US25L2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab031e008ad82d7374b8bd8f412bf730dd03ca482013d354883cb86d4520e51d. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/US25L2300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4242589432b5f130a3529309aad2c494cb532e1643a425062add7376a4034d2f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/US25L2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8a257872f089f1c1920e39fb07b91a13df2c1569ef1b515f6a108260559cdc. 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/GBDPR2006319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3ab35287e14dcb1dad1226e5ef28b79d87827e191d793d662d8dd261ac7c4c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBDPR2006325.