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 0x09990e796d888e7af7d65000c98bba3b9e8766377a992c7eff1916733fd2af63. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc16dce7-27b6-4fc0-b608-e65d358def77.json and https://artists.proofprofile.net/proofs/artist/cc16dce7-27b6-4fc0-b608-e65d358def77.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 0x0252f066aa0a4700c7461b3e491d62f8fc117bfc3b00ff6341bd2cb46c2f863a. 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/QM6P41818269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a519c9cc58816ecd71fc9d4fcad34f2267154f156b2b6c7652050bcbfa09877. 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/QM6P41817016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14a3faee8f43763509a4edb7f5732afb4a5bb1514b9fb2868286d52b4afd9da. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/PT2HF1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x705993d5988862e7b22317889888a1567d315d5a962bd668f3dd72b3a5902014. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM6P41817011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b18997e061bb9731df48003a9eb67b158fc42bf1ddee6c7adeaafd6dae8df19. 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/PT1AS1200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741f1e2d601f7541a9177e0e900b7115f11e076af93a307c17f0b1f2a8846a4e. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/PT2HF1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59486a5f1ed801ec76863570aab2bf7cda622a16f117136dd5870feda2b71e08. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/PT2HF1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d936be5dcab3034584316ed63b3147bbfaef5fa6b836da8c70c43290c8d608d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PT2HF1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687f55de0e8c67d00de73dfdcb5bf69609c03a8a52fc83393b668aeba307fe00. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM6P41817013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346150783af04d383ef97bdf2a7cec95d6f17645ef472b124d8fd257a78e2989. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM6P41817012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05559e12aae57bc8713aef386c034087feca49a490fff07f64f5fdd68cc064ed. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM6P41817014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988caf58b2dfd356c55bc8c0da0911c35adccd7a269ba3fac9c0123d7f46a512. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QM6P41817015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac12586c4406e73643654c49634ec5af64cb2e62e53b62e7c47c3d7088817828. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QM6P41817009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d782b60b16075e9806ef0bdd3357f1d56d7b0b2ac4c866d8b380c35dc324024. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/PT2HF1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3324143b4703d05f6b448e9e32a9c21aceba536d6b885d87b68af62e9f7b7bc7. 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/QZ22B1608896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0813923b5491830b7cb3b9523eebb45abc55ec11bf10de94e228e59ad62a8645. 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/QZ22B1608899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ca3f71d36ecd0dba0b7545141e582003ae97a2289740dbf3e9ac41f512f1b2. 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/QZ5AB2090744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651529917823ea614c611ca3f12833cc7bb3723d47d588da0f4ec5aa301963a6. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BRHNN1200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa19729e2880f1a6efe042b562ab252c816ef20584ba5c6188bef4caa5cdb7b. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/BRHNN1200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6655235d95fce14c1def48b46a520ff38892a32cfef7e1ebe8933b5bb703da59. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/BXCMI2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dbf5efc81681ac8bfb67a36b8cb2dd1f636b086603ce289e8c6712fb7326a6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BR3W22200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314e90489a4f34fa8f04bb6a37ce9d57e8dea8240ac56b6ddff856b4c5d48e07. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PT2HF2000124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e7775ccb2f30ebcd2129c21f11e86ab13cd3262c0cb6005e4c709476ee606d. 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/PT2HF2000125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8042be0d4f7be1b687edb08e2921722fd4bac3a8ee36848bffeef3411a2ef8b3. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/PT2HF2000126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204e08c18d4f13de5a5e98c9dea09ec786487513a837fa9545501a8097e9b26a. 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/PT2HF2000127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5b7e502240f810aeeba9b80469becbc2f75f5278fb5a4028e476924849012f. 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/PT2HF2000128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353d1b9e4025a7d0b86cf5025eed1ed342b8e1d0c76c58abe3d36e7c71542a8a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PT2HF2000129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743e57a322811c4e1f9cfaab08b2f92c7c2f4e059b0845f7930308b72e2ca537. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/PT2HF2000130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda07ef1fbbd5c450c9bc2a67d18f9b9cc8f151b9a4b49f9cf51924e59399a1df. 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/PT2HF2000133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e0afdaffa927332db16c2c14a246e7f4ba21cd6ba4688ff06b517e2b5512eb. 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/PT2HF2000076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411ce9948c4cd04f5efc119cf2f5bf0610a1f68f164c08e0a3b6a5a2bc6b6e6b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/PT2HF2000132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa381a385cbd21063450110a036b22f1656d30af5576103cb269601210a28d1c9. 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/PT2HF2000134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf158d957e7ab7d1b680690321dac880cf3f82953bdede261406d12759b04982d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/PT2HF2000073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e83efa50d90e344a6be475010465e53bf088d296ddd20de17b49f28918e1eb. 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/PT2HF2000078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e08bed1e0a9a7d657b75f686bb3f9dc63c2266fde848521e1266c57551cfef. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/PT2R12400001.