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 0xb122b5cd293e1ce486ad35fdd6c51d57e594ddd1b18c65f09b185afb272a4028. 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/b38b5a42-fe2b-47b2-be2b-6c17290143fc.json and https://artists.proofprofile.net/proofs/artist/b38b5a42-fe2b-47b2-be2b-6c17290143fc.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 0x669f42d41cb55edab51de5a681000eee331b0c9ab3dd33cf7bcbad582a91b389. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QT2VB2424565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee36e9d04131c95ac67aad37ebc47359dd14e48da957fb619eb41ffe6431535. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QT2VB2424566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0ec578c92ae32fe1cd14908c9d189014aacb798df44a33b22f092648a8aebb. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QT2VB2424567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6b5e5104273001d325d1ddf3dbd9317056b616e278ab0d49b00b807a5af97d. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QT2VB2424568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3a6d31ef030117fc585e0583e140b1d7afb4ca9186ca03efefa5fdefbc266b. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QT2VB2424569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822f6fbce5e1a14a26e31a3b472b1c0e0d6acc8182f7e85e6b6dafa54ca19674. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QT2VB2424570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66470e1da1fe09ca1aa5a69ec19a55784e30427e9ec8432a8867615d2b961c92. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QT2VB2424571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725a2b61fef3bc512ad9e2b6329327826fa6fc6beefa5daf59293c12c90a88c8. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QT2VB2424572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469febf2ffcf03322c62f2ed7984bfaf430e15eb9cc94dc99e5352aa757c21e2. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QT2VB2424573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889179f40b87a8ecff856306b7317ed44a0363170dc1e3a6d92f1b7a76b9bf22. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QT2VB2424574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9366ff1a7d081fcbd199a49669b8e893b4f3df71828029eea5d2ee18b1e8c8b8. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QT2VB2424575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62315df99774cd7066437aca7af25e3ba98ca2b5743ec7ef557065ccc43721e0. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QT2VB2424576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce2c606ace288c383fa671d0ce5fd5c289d14165175d46a5f0e5f7b9ecab917. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QT2VB2424577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddfbde85e1b71717837b2e12671b60aaa72131d95966f8a25923bce132a7550. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QT2VB2424578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf828276b394123ecacde296324e5e3e4a085881aa5985a7500aef403d5069851. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QT2VB2424579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87eaa3fe2fd70cd23b77cd1a6ff45ae48fe267828cfe07b178cdbb2d6613b716. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QT2VB2424580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bd069569187b7f76dd011fbcf913c4da5de4353adb951a82ca6610ef16d30d. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QT2VB2424581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181ef16c2d1de64ad62c984f485210b39d894856c6a3a0d958cef99216554b4d. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QT2VB2424582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce2272456071f3ff3577d70d1ee77007a168a2538eeac767b6b6e201879a86c. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QT2VB2424583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b75bfddd4ed1ed3a9aeae4cecd2786b0bcba51acd15b2d67ecb8643d3751d1. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QT2VB2424584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8691551fa9f2c5ed6e347e14158751141a7fed03b163d586f076a69cf1a634e. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QT2VB2424585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306e85e58095faa8ae544eaf95cf4e84bfe9ca962ea13ca7d76be0bd9dfbecf7. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QT2VB2424586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ee5cf17b2e8da785431c48bd94a3be51804d1d70af629b14a58e9c26adb86f. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QT2VB2424587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe391b99a16b612acd4061163fbf573c46820c10816e05478b08061015d697355. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QT2VB2424588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cbac71dfdc462f8a631a838e11ed736e7ceea4e574e7887ac10e8788fec387. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QT2VB2424589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960d4a438c5bf030b8f6c030f54f7af1e0d9170680e0168c414fb4b5bd391cca. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QT2VB2424590.