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 0xf073d30d77c73d3a3f31d421dab8afdd03d0b0ce8bd2e5671ac970f8b4489045. 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/21bd4bd1-bc8e-4b2f-acec-95590968bcda.json and https://artists.proofprofile.net/proofs/artist/21bd4bd1-bc8e-4b2f-acec-95590968bcda.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 0xca66a20d00cb549b15c4e7bb144cd5ce50319cb7e6a7061e2ae679c6136ec271. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/NGA3B2117001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd54b4bfa42611a8b7b12b2e756fa9aef1adb7f796407ccc422ec5f5e013338. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:46:29Z), 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/NGA3B2117002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee590af30375018867057b5f5f0defc3e9c5a8f33f8327355b8fb4ff09006a1d. 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/NGA3B2117004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e635a1892aa9d6ee5c4258b8171b156344f853b1503cfb26382e2f1287892f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:29:48Z), 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/NGA3B2117005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed9b82b363a5fa89530b4014f6360a5cde5343bc0057dcf2f84fceda54a18d5. 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/NGA3B2217001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bfe41aacb116aaf78b8d022a17b3f7eebfc342ed8081f5066ec9ab467bf145. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/NGA3B2217002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035aed87c78f5d9659287bc4dabf499da9deb6c3623463160ee8e1a9409aaa04. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:09:33Z), 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/NGA3B2217007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba768331d74224aa0f6d26a4c14a429a0c6f4059f3125957503bae971c403e5. 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/US23A1577966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba768331d74224aa0f6d26a4c14a429a0c6f4059f3125957503bae971c403e5. 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/US23A1577966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d69bd7e74984421a5c36f59cea69a39063d5058cecd21f64a9be9192b9ca3a9. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:27:34Z), 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/NGA3B2417003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc85e649467c557b7e0e8e505a895271c60c04841480a0c9ccd8a904f0c4de2. 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/NGA3B2417005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc5c1452fb40d7b046cdfe04cddafe46dc98f862ced08920ea5398bed8682ea. 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/NGA3B2417004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193704b6c70143f3cbbf6154caf520c7a486c130234bf0b159670b00906f7ad6. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:21:12Z), 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/NGUM72500092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278f96ad09926e712d0b06e85bbebfb5c4a01583be0f61451545476d8149a9cb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NGA3B2201002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7d1c135150ffedf87491fff17995e7497792283eb74d128ddc7c3ded58753d. 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/NGA3B2201001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982c2e6c6a7fe26a4d84238fee6c92d1208172549dcc6aeb87624ea1ace2eb1d. 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/NGA3B2301001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c0642b4969971f2bb6deda17d8ee2178fee14d93872f981d7050046f7197d5b. 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/NGA3B2315008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033a8c71999bab18f4ab9dcec9884e67b1cdbe3e1948c0842245dd818a7e33de. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UK43Q2291259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3463b93e84d3b599bfc2bc63b86e6597d814952895aa18095e138b69c98d2c9d. 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/GBX722200572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7f9d2b1b1d83faf07f6ae2f680c762e681c4a4010f77ddf05a233d6dac3e8d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAEQ2098111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1957197cbc5822d8faa01c608c0a19dd54922ca32bb8271361d58c625ad67209. 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/QZNJY2328942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6632582dc59906ff1555d983708804f7c4db81fc18a28caa198307f5bc56d0. 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/QZMER2412388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a64d8d678552db6cfb88b225bcfbef00283031767b823a0f00405fada969c85. 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/NGA3B2201003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278f96ad09926e712d0b06e85bbebfb5c4a01583be0f61451545476d8149a9cb. 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/NGA3B2201002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e56bb2046330db4bda679ece2409bab9e7a3fd8133d31ee787645708df1ca3e. 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/NGA3B2201007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b023b56c9f56cd521f83e7d53d619798b6312757ef179b24ee683d22547038. 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/NGA3B2201008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889ee79df30458a9a6e656996383539fd60c1f03146f76fd51f5ed857cfb5efd. 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/NGA3B2201009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04f9e77c6faabf039ba0f66ca3f0816f0d3b78623ba2c477a5b88d70f1358ea. 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/NGA3B2201010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ae48757af6cca448d5d2d56cdfc3e3aed473f34b086743cbe443e7f310e8b7. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/TCAEQ2098209.
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 0x6239d1c10c1867a904e0cdf0b9bb1f6b2cfb0c1e64cb5d59d01b424d6c1784f9. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/TCAFX2160374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957062125214ca73b6739897c0c7ab1944aa966e9c1ae140b148b14429d7d8f4. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZMER2412387.