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 0x2378a49d92dac8e130bd8f0bb3632e12769b85ecfeaa33b85f4cc59d586db987. 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/0d283fbf-840b-4c8d-8d61-47a28933b912.json and https://artists.proofprofile.net/proofs/artist/0d283fbf-840b-4c8d-8d61-47a28933b912.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 0x7d1f531e5baaabdaffdf6e9a7025ce2e57ed5087e4219394348e49af1ec2d211. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/NLUM70500310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2cfba750cf44543168f8bb09eda7bc2d240facf96b253a8ba290a9d5117827. 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/NL3730900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7ba5e45215f0489671c2f52b14f93a96d84e3f72120e7dca019297f4cdaaac. 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/NLAM42400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b3354a4dd3bdb797e8537dcd9ab99c4c713bf85a485b6d2938727f106dde24. 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/NLAM42400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f7c1f9a7d1bfb250aadd079e064b1f499e1c9a25195f5aae9d0671024b6969. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/NLMN21600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcab3c902e451d7a48e73831b3b4205eac6493e8e83a02c2952b1ff0d086020c. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZAPG1755980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c4476a1c597d2edee7f1e87b1836f515a6fc4dd5336d67da42546eced2a2a5. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:49:08Z), 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/NLS241800314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51bf59bbfb7058cfdd82a1a955cbc66abb67c7b1ac838520d02e2aa9c23a293. 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/NLS241700464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8dde663436fd20a84a0f54f34c8ecfd7d447facb36ac8dd3c12c3eb9be4a05. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/NLS241800528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b4f01a98fe9084f83f593eeeb5a4581fb482d544f414aadec4059d8ecfe4d4. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-19T23:54:16Z), 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/NLAM41900188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef64a5a49218fedf70fcd0ddae35bcd7849f0d06ba014d169f3fe0d6b9364a1a. 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/NLAM42000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6193b10efca0d5f4c04a79a586928a0291e2307a3e190a858b2908923389cd43. 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/NLAM42100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a20ff8f211c2d36b66baf7f38bb1b28f8d974c5158fefd4c4847f2250cb2c7. 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/NLAM42100124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3990159745e5b8d25bb0c96c100a11a7c1af92522fe9922b425aedc694b0c769. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NLAM42100159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c58ba2da7df3df8a55fb45d4a242d7cdb040b515e958cdef916f587e9b1c84. 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/NLAM42200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6788092e76596c197c595075616c8ab2aac6727f0c765fe91ed4a6033baacfe5. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/NLAM42200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b89d9d7a04ac40bd5d7eb4c9e4987b904e72f9987c12f33f5852802656988d8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/NLAM42000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f6fbb6022aac79d1feb04a308009c7bd98ad21ca0dea6930235b3b4972994c. 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/NLAM42200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223eaf04033f5d1009e9a52b0a69a65467429467092da690370c99847f9e31cf. 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/NLAM42100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae51d3e16b5e8a65eb2d5982e06b0719d11ce2c5c04780b59111d576eebe421e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/NLAM42000234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea70d7bf7ede5314d41136b129a2eba6dd5a1d9fc79e365d8dcf6db4cc639f1. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:55:31Z), 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/NL3GQ2100389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c70f99d237080c538c5576b95749f4150ee3ca38b04847b92193a696b764975. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLAM42500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6420391e5a72eb2e7a0c67abaadba263d5f8bf1d498bf531c693b3d40c0cfa99. 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/NLG661800615.
Doe Het Voor Jou (feat. Gio, Keizer & Lauwtje)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a39170b63c5643216e5086c2920b5582318207ccee7984ddb9b08a6eaec5f36. 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/NLK2U2000395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf0c9b4936044dd40324fd5a05dd87b25777b2f76c01d3f603e5514417e64a4. 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/NLS241601841.
Body (feat. Gio, Mael, Brace, Jayh, James Watss, Lina Ice, Deemer & KIMONO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcbffee725cf3f341e662a8eb221a739cda9c2ef6fb70a5ee573575eb2c52a7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NL1XU1900035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631305c9357a33606fcc8f0217d0bf4d3ba65122232c9e4e94a61ae2b45b11d1. 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/NLS5K2100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f6fbe39eff63476703cec78ac67ac98e133e6ff3185d8e005fc9e76fbdfc6c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWFL2335307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0ab645f3295565279903dc2154765906523d3ea87e813696ee9ef5fb73e34f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NL3GQ2100461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6bf71ae317068152198643b48a153ca58dbaa27fa29604d44e697e1f4536db. 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/NLAM41900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755e9454d7e5bae10bc035acaed45dc765e208beeb76ac4142e3e48929113b55. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NLL8M1901121.
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 0x56bd4a38ac28510fd7725359290388549958f917b935cb4dce1c8b5c2110e858. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/NLK2U2000372.