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 0xfaee2b02f221d4c741c4675d33cd76a96fbd611b2b6de968c0ef3c1aad7a497f. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/232343bd-db7a-4e2c-bd27-1632be659f5f.json and https://artists.proofprofile.net/proofs/artist/232343bd-db7a-4e2c-bd27-1632be659f5f.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 0xdb1f6adc3b7519d372084f0baac33a21d3313654e8640207f0a2f4f169e90049. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FRX202083903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9c1f7a16c497484414d9ee170fefe77b0311e8766c294757546aa409279d67. 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/FRX202083905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4bd1ca37eb76aa108cab32a458e18211e01771e9e9a34af482939f10800c82. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/FRX202083902.
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 0xd6638fdd7441a16db7a36390713aff2bddcdd71ef65e268f14e5eeb8a4c32bf3. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FRX202083904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe4acde8d491b37e6bbc64d843a55bc67ce4e80080d6827dd52726cf16ca87f. 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/FRX202083906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5ecfd75fbcce9df8d63717213d0052078703651f23a0d961729c8da34e61af. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FRX202083907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231102a71d923a3d0c4485fa340d539ad19feef17d2383bee7547ac5b2c35598. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FRX202083908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e9585951bfe07116f72bff5f58b620acf7e2aec7b35160e6b0d0d1247c1e5b. 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/QZNWX2417292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf81e26d69439db1b42f78069c22a26f27f72f803a2bfcac9dab9b59964f89e3. 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/QZHN82484472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6383389bc010093e4cb761291c82ff6b5e4aeafade4b1d6bbda185a5cb6891ca. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZDA72407211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bd9dd3857e8e1acf663b0628e1d7c5869871f768cd195801296b817a299dbe. 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/QZRP52330913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1220db0c4cb416d48d1d73679955081bb678c83258478328c29f52d1f9f8327. 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/QZHN42330127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc8d63e54f2b1c8456d8723f8c884025b14e5742e752690f2dcc75ebcf77df4. 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/QZTAT2216601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73449a7d5fc67436e134c296cea23b7eed2630a5f79006891c88a55354c327e. 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/QZNWX2265840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06ba573cdd4e727d55fdd036731fbe82d9b305035091dbf50ec41cc957aca33. 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/QZNWT2281285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafdf40b45e187dd65842e0e79c8c5c8d59bb6d6ce54ea7764c0cbe59a5190d0b. 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/QZK6J2203594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c25b14db182d1279aa4b1aac3fcc745c80c84e317cfb653eb2fc5f691cc9a7d. 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/QZFZ42207019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390fa4728eef1b44af9085b92788ec8e44e2be6553834aaa3f1f70347286e417. 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/QZK6Q2169402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7e235defa090be8f24e427276fdcb9928c22f842148e9619905c3746f559bc. 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/QZES92152772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd39c63937b038e48db777f7f9ebe5fbd5e4089fd5c90e0ea2b4e0f4c253f81. 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/QZNWV2086627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f56c030588b3a8d1e05974f44c3dcd26165aa725c13ad77dbc878ad6a9e58e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZNWV2098727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b723beb4c82ee32dc42982deaad252f5357d7642bcbfa61cc13e42d489f197a. 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/QZNWS2057051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb568670d6062254f3cb5d083cd0e3c3664bded441809f1a69c23b48837b01acd. 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/QZNWQ2076272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7429711e9dbb8dfc20d4a3bb920926cc3848d930cfb42fb9212c9376cbd7ebd6. 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/QZMEQ2058662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77053acc665caa8a3e0661413918d4ca9590bdd43350d482ed0972809c137f44. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZMEQ2035854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15a8aa6b6ca68a57420a9183e21b160e1a4d26e97c5fd6b99213943d351deab. 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/QZMEP2083411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ce7bad9465141ded880012d0145c7bedc6070b7c3e6992fadb3359e36c6712. 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/QZK6F2070498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff00954ec2a93faab6d54fcaa00e565280cfc69a3bba3bfdffdab818e3e74e5. 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/QZTAY2422082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e15ceb4479de5ce76b5621a4469a574642fbe2b75f0b9327f64b359e0448481. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/TRBIV2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3b019fc73719f0152520b4cc79ad1af35e1c69fcb4b5f14b4c6c0ef2205be1. 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/TRBIV2300013.