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 0xc0df5c551b43006c1657e703f9d819646aae4ebfff1fb937f846bce363f107dc. 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/8934af3e-9acb-454f-a8d7-66a8612979cb.json and https://artists.proofprofile.net/proofs/artist/8934af3e-9acb-454f-a8d7-66a8612979cb.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 0xfa31bbe0818eaa5977a1b52f5ddb7f7c8de528d0d3b0dc5220c9d8bc859b163a. 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/QZNMX2452589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858f18949158fdaf00ed355e99cfc19575463576eaa4073c56dd25e3ce695834. 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/QZNMW2490038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ac036c0c9f927c8ec756fdaffb270ec6fa0ec31bec268b0130042ea26ad2b9. 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/QZNMU2409886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66d0bf44448f40fffec113e00880fd0c5eddde504ac8ce3fc9c385c8143b347. 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/QZNB82322731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2364a4bd17ae7fcb7532b8bed524fdfb07e1e20ced50422a62daf618858e06ba. 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/QZLL92393822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b0dcb135d769181fd5774446b440022793a45b656362698053f34bc77e0a0c. 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/QZLL92393823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87f7121092287026e1030353dcf6b89bcb470d64c24f6744149ef11aabbb0f2. 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/QZLL92393824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4d301bd967c1a5a073f8c698fe0fb09e2928ff1a2e00beac5102594774ed9c. 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/TCAGN2200918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496e8a61dd37a44eb7f05d6ea7075d3a73ff0851444d1429adbfa818edfa74b5. 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/QZLL92234533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8708ac980bfa5723cb4da984bfec8fb0d25171c1f733a0ebc9d8bbbce1e013. 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/QZMEV2122321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97e4f1e61560079f92f7613429f05c77125e22d7c586e5604853578e7309e26. 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/QZNMY2195774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655a0128a5aa4fa49ac6a90f7f8a923e3b2dd9649e2e3566be6d6188b7331774. 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/QZNN22186745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc639ce47dae4986749fd8a881a899ace3b67d8ffef8055fab8fa666157b01da5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNB82073948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeaa6092b4d2d39a748aa538209f68954de2c6b8b27ef8f9023b54879b006196. 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/QZMEV2062105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e84dabc4cb9afeb3adaed1cd59be29741e14ce345c875f232c360f27e07bb1c. 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/FR59R2468481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf2631ba7065fab46c1abf6358f5aab3bfb6792595206c1f1624753430e17e9. 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/DGA0L2319457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213ecc2d1a64010fc68049838659d09891660f6bcc3ffcce683c9ba23f5a0f1a. 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/FR59R2468482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c71041ec4ec054c006a35d045788c35b2428caf4b4cbfdd3473889d09da662. 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/FRX452334439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8d6999537f827424816dbd70e246d9c01c7b24d9cbd1c0d15a9fc12a25dd34. 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/FR59R2468483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f72ba15937bd683285c7341e4412e4c5383299c8bcde5f0cb4ad6462383bcda. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR59R2468484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0427f2d65b3cda573f30ae86ceec6a3d1244e4625a56b44f7730b1d0ecd2f56. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR59R2468485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6734a7ac840336f0795f0b6cce25869ffd83f876a54baa8f26d7063b80f7068d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR59R2468486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc61ef0abe039e9701d52ed4bd82c3fbffa419700a5a81c5e62ea49c12d5fbc. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR59R2468487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515b8f7db61d7d5452c8596a4accf459acba2ba31dc4ef46e884f4631f76fb53. 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/FR59R2468488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13b1b7db37b1b9920be933eec787f24c1153dec30b184633e78d0f00869f3cb. 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/FR59R2468489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb579f19a8a6c01ff9dcbe91293e99d0f15a1124b686dd4e05891c4899a5193d3. 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/FR59R2468490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8ee270bfd90cac8b88d153299b48523e092c0ed27ebce4556a319d97aa0f4d. 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/FR59R2468491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4176ff1cb989102390bfa7adaf1c394e859ff4096235cac84afa1e3feeba2789. 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/FR59R2468492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c2878dee86dbfb01ffe2e1b8aa7b248c8ed12a9c17dcd3a4d38b36943bc5f4. 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/FR2X42463009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adfbe2ecad7ffbf822dc0a7a9c5577d00b4e02cfe4abef962044d35f870db06. 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/FR59R2468493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc050e60d71e72d9fb5b860ac8582ad106cd6adabd4dd6dc6f5f72bfb00aca91. 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/FR59R2468494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7f1340bc489ccd766f88f304dadcd8f06c0956e3ce39a30e5107380a11af01. 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/FR59R2468495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d80fbe5934c5d8323e3da91f634b3351de5bbc51e929d080f2dbd749e9132c5. 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/FR59R2468496.