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 0x7a37f86c131cc024879cde036c6f6fe0c76585a0a74e50c8d2ea0bca58054cc5. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/310481f1-56e8-4287-9daf-0eed3d5c2403.json and https://artists.proofprofile.net/proofs/artist/310481f1-56e8-4287-9daf-0eed3d5c2403.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 0xa133e1e1a6bbccbb676803c55be2058a88c5cca1cc0315f3d00436b07539e17e. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:21:30Z), 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/QZZ7N2554199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73a30eddfc44958bf66137a095b7731993093d865db8f9a0a9393cde0b14495. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:02:12Z), 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/QZZ7N2564060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef5bb95f31287c07e2ac26bc1babab63cef75528a8e5b2f0b4e683e45aad49a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7N2560984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef083d1167b1eb17ce2c7d1be75ac11d18de9123ae217af0a1a713b039d7e57. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:26:27Z), 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/QZZ7N2564139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acaa1dd51b4d4e69f9812bf0026b37ebe57550aa5e89fb3cf4109482e23b05c. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:23:33Z), 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/QZZ7N2564187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe748a06955890b0b7b2eb860aaeebe18d322958714a04968cb0305404c9ebee. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZZ7N2564046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee3fc5765b87d5c9e1860a557adb095106396aa4ef8b432ae8a295422fe16b3. 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/QZZ7N2554248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a75874f6012185807369133b74cf058070c0de4af48d68f08828f8374cf8af7. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:32:54Z), 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/QZZ7N2564049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9719cb59ee2602697c0eef11ef62bb27e508a3a472badc113331ef8cd37c6283. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:32:56Z), 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/QZZ7P2598439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bf0e80b514f288ae1916dc872d4d80d7727dbcb53abf51cedcff9237abd218. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZZ7N2564044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0252f38bd3fc2bf9e5b899408ab9b85536b66e8a4a276a3a8517db01d515f39. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:01:00Z), 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/QZZ7P2588280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0e0dc4f485e5d6b3666da9c414321eca58781e358113cee9c8b7afbb3686be. 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/QZZ7N2554227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbf89fab3be97434c5f97891e49976203e717f9e06299e08becf5a1028bb8b3. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ7N2564041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e52dd9b1c02d4b9c2f6565a8004f9ee251d5ac2c64f5b70e3c4a90af6d215e7. 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/QZZ7N2564051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba3ec8335035fc3096c6b368ef695d4085d4d907e0ad0538dc7da2b2489b291. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZZ7N2564152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d4504199cf1be88186998d094b3611cc68e0b1e6cb5ad6d6fa944495cccdab. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:24:15Z), 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/QZZ7N2554232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702c234c7625ac90edfe96378166a07762f54cc08447f015cd054b523bb0e895. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:28:00Z), 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/QZZ7N2564056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac54410f17c215d3f82cc7e62933f9c6bfa09391f99bdd1223d5d9a1033f470. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:20:12Z), 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/QZZ7Q2547815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5686bf365764ad58eed18cfd342789f4098af2d6346be6dfe203f746e47e238a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:54:06Z), 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/QZZ7N2554229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9076d6da2dc041ee7ca4343b0e6bc6495a4401f2867cd2bf5c345b7db5709feb. 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/QZZ7Q2521052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2017b8d6469b5c39a6dee7750a42cc6a4a725bc6ef1cd9a89d6589fb8ea87a70. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:35:52Z), 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/QZZ7Q2545704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4979685896f5b312f2396caa1b1afa37027fb31bd0016a33ba6343a3bb7419. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:06:52Z), 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/QZZ7Q2521050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402ae9481dc7f8e3f3b22261ba4c012e49bb4a3314de2efa242b555e5589ac4a. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:02:36Z), 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/QZZ7Q2597130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3479e05d55eaf5429c92de767be46ebdd48b2094c1357ccbd3a915a0ee1daba. 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/QZZ7Q2565233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791fd7bdd1cb8bc0b46dbfdf09ac628f281ec3671db3bb0a45100cb11f1a3138. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7R2561605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea2e2c38be7bc5fe0968f9fcabe396ced7df6c09d85b2e7c83fbff295c7b953. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZZ7V2524159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145db3675683e83a64edba0885732114b1bb5a01da5bab5053f239ec26ce5673. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZZ7V2526558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351cb80811eb389842bb0c5d23d7b1a47efee27f0867030414891a744eea4134. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT3F22510942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9e1e2f9d42083e760cf45a768981b53bd134ee077da2e2bf91ed1b77d911fa. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QT3F22510943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ddb8a0253ed50c5bfdef80f5b47290ad9aad3a9b2aab74cf57cd87a2461ad6. 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/QT3F22510944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44563611f0bad836804a14b3f9a07596350ae4f1d05d528df0d935d77fce51df. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QT3F22510945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ac1a75c41059504951bff34b13dca11f8eb6bf3d8725a22872b0833b7b27f2. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QT3F22510946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7821af3e18db009a70368aa6a9d04512576851f1f3469952f5b3fd6fbf61ecda. 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/QT3F22510947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea42156807be887bb1268566266ca3b2c3dede085150d1b23cbb6c17a7d0229. 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/QT3F72533816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a8f48b6f9a85325f395dedc2d0155b97a9e47cabbcfbdc53b31bf11fd86ad1. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT3F82556102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf383a1e85e26657e851360ba248d6ffcaf8d6542e72100dfd9c355cfb0548f5f. 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/QT3F82553932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73978e4c171181c9f6fa034d1cf8fa7641b4e0954f2d7748ff8d5ded4b086739. 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/QT3F82556190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629d61a94c85d565a412911ff91bc3e506a2f3bb79dda6caae73351ea613f55c. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QT3FC2501018.