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 0x1176301858756bbb23ddc35662796a641e0181ad48fd2e7e95bc0bb25c7e6ba1. 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/dbb73d67-de81-47d7-879a-ad5c9e5d0b6f.json and https://artists.proofprofile.net/proofs/artist/dbb73d67-de81-47d7-879a-ad5c9e5d0b6f.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 0x81635427563c91c0504bd63d9fb2782ae9641cf6b649a882d01966030510a048. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ZAA010500339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e9e4c1e3271dc65450076c2d0911bfe44794ce0954e603057ae1fbc4e1ccfd. 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/ZAA010500341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7e6095e975fbdf0fc1cb08b312360efaeb3051f3d120541751b5ce7209a84a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ZAA010500347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac9966bc978032e94128ae6fad7bf96a838da44dc662c0da0429fc1205ccf19. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:41:04Z), 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/ZAE531100122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6315e7eef148cdd382365e3ecfaa8a277c7dbdbbcc3a729896f3505483ff77. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ZAA011400248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6087638e52a39a5facd1f539110135c40b21da44286a06d34778bceeec9f36f4. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:38:48Z), 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/ZAE530700229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766dc0665f2120756a1aaeac810fac2b38579ec0ef27f7d1b501685135e0db45. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/ZAE530800235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bb4723a30acd4bdb007556bd0410260cfb9925b508b702c4e439e601be82be. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:59:56Z), 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/ZAE530800237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ccfca17f30bf77a6536f019265dcd1d097a421cea91e7675af14faea9a4c2a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ZAA011500444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0220e47e7fb6fb7d9d47e898406c05b41aa92401d3cf68f5f70b3cdface581fb. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/ZAA011500451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb45a009cb663eab2740d6e57a4da76a89ca7a58b34b55fca61ed944176c8ba4. 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/ZAE531000162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77da257992529042879acdd47949a02ec79175490bb4e20b5f29d7051d1d254b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ZAE531200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2a01cf6105258f552c82b42917b2399ee37ff0ef5ab4b7a11872855956007b. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T18:01:12Z), 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/ZAE531200057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb45a009cb663eab2740d6e57a4da76a89ca7a58b34b55fca61ed944176c8ba4. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ZAE531000162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df8a9fb4d1c3c5b183eeaba0efaa72bdfa53a76a0959379c2ea01d1c8701a03. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:55:45Z), 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/ZAE531100120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766dc0665f2120756a1aaeac810fac2b38579ec0ef27f7d1b501685135e0db45. 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/ZAE530800235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60fd258fa2fee24f4454eb69dfddcbb3618e3b18c58a7a901fd3c7ea02321e4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ZAE531100121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbeb04244eefbab513815bb52ac80e63f06260d7ddbd8fabbb408ad9c5406c7. 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/ZAA011100379.
Verskeie Kunstenaars - Klanktoets, Vol.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a291f98520e8035a6d5220f9bcf65f4c36e078e248482649d903c8421f734de. 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/ZA10O1900406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a291f98520e8035a6d5220f9bcf65f4c36e078e248482649d903c8421f734de. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ZA10O1900406.