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 0x7475465cea3ba03f383a6fe645d724b0ccc7f1e484b0987586306519dfa03a96. 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/d721b86a-4bb1-4fd4-aba4-ea98b1f426dc.json and https://artists.proofprofile.net/proofs/artist/d721b86a-4bb1-4fd4-aba4-ea98b1f426dc.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 0x6b7a1c63c228ec874359d8e535ec9267ebe08b6279181fb371bd2ad815fcd4c0. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/QZTAT2406523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbda3940b96f2987165dd3b3089440d507e1cdc9cd8121bcbb205d801697edd. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:10:56Z), 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/QZTAT2406524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f37a3ccecde1af7c00297ef8fae64e8e5056cce25bdce06188c17d91c205b8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTAT2436053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa4252e2200678b77c73f4458596d99319f0d694cbc046d651b7fc1099cac02. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:10:07Z), 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/QZTAT2478566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57abb875aad3ad5e6a0cb97b6a6705e45c01036efd1f9660579d187a445f326. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFF2485252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd801c40067a149acba7d982f91dffe157364eb84e9a6e63aca740b729f42507a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFG2451406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc88739939790872c6fc81447089626010cedb30af0d9db51c06e35c31eec102. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZWFG2492493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63720d6974b4ed47201b28eaf5f1d0908971014f7b79df35c5035f1515ccca53. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFR2450621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d08e1ac61272d9f4e837eb5ff6077af473e003a0031c435496de520a0dfacb. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:40:52Z), 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/QZWFK2461717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46120e410eab56ed3257ada1c2bad242783d3f2a7bbeed085f1eaac06f6fc4aa. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZWFR2450622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39862d1ceb6e95e559f93f542f88799b9462019d2da97202c13ba9452b1d0a0. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:14:50Z), 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/QZWFR2450623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d36d746322dc08e9eb67814c9f00f8aab8b6a804edf6a03a335e3d81769e71d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZHN42532302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe35c049188580c1f86103ba781e6326f40282bf192b46c81464a2ef250e0a9b. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZHN42532303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d9b31f5136ea2a7369ebeb41b4071d10adc6ef63ef90d45a6c9f09af306b8a. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZHN42532305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d42170bb077c64a13a2daf46a2f836fe74da5998aec63d64866348c1baa845a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN42532306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3571b41287e1deebb4b205fe935dfd8c72725af4a3cc005f2daef41cc7798ef. 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/QZHN42532307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109f8a05f3772fc1367934af45de3c4afcd33e38266ece04b70e7aa01a279d59. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QT3EZ2427216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa89663e2cd3dc8811e2ff89413e6a018c83e7a0088c5ecec775c7d125275a8d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:02:12Z), 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/QT3F32424056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa89663e2cd3dc8811e2ff89413e6a018c83e7a0088c5ecec775c7d125275a8d. 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/QT3F32424056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d6ef5b2432074bf08dd0639d7583f23e6e650a27b3596788773406d7e8c756. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA62588015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db5d8234eeaea496fb4a19124e713785adf74e75a9a62cbc34db0f38e64d281. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFYX2513527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1db981cf32dc7208af029dd24e3da807334f6da568324b4148c7e8c9f74436. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:34:34Z), 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/QZES82535283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912e0bea51f8e84f10aa613e60c6f1310be214487efc51b2c17c6a6c35cb3c46. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZES82586894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc83db6bb423afaa64ce612b4067e98cf0140e72a1fed4b50fbc4f6c5e28695e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:18:42Z), 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/QZTB22509899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1438c56e86df8cd6a7712b667c61a9fd69cd64b8befdae89a51001c5764fc193. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTBC2530781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2559e123a04f60e6de9698ec0f8435d4911c7e400e28c207803ce9b0dcfb4ba. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ7R2528388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e914f6ca3326f88e9b8c0f0704d3fb16fd355283f6f4d19f70a802f22215915. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ7R2528389.