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 0x852b92b58af1396d03332815d5ecafb71128ba3b056d9768de82ec70aec1fa88. 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/dec91087-a577-4c16-9b96-de78585d5451.json and https://artists.proofprofile.net/proofs/artist/dec91087-a577-4c16-9b96-de78585d5451.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 0x8c08a2aab283b81cbd280e215ec343ecaeb0d5e2216629134137b8a8ad3ea9f4. 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/TCADX1886005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71830469c53faa92bc855af7db6bec768004bca48c8c1a2d3dcdbaca54584922. 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/AUND01900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd38486f33a7bc74bf8d05d789f848a0073dd60106c3aec82f956486ff8a0ea. 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/AUND01900539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4751237256fcd274d9bc3b724cde749f5bbc3f72d5db2a343636b73af188b713. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/AUND01901167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae05f0ef115ab779a0357bfdb1621dd89fb76a34d2f3b75ad0e99af6b1b17d7. 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/AUND02000401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe77c08070e0e3382b4a16972abc13829637f54fbdf1e178574cee73c977d09. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/AUND02000638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3965cec1d83771ecc1317ffa332d3e414df05263f72bae0193f7ea651993564d. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/AUND02100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5759eec2212f5ed42bfd50b197075c6e1249e02f82d9feeb7005158d4e5713e. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:24:50Z), 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/AUND02100182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51e64e730a34ec6e128665fc5eadc6287bfb20f9d8d717a9fca818c4ebc469f. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/AUND02100319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffd0611da977dde8607a9de9ed5653ed28e319bbaa259767183abf15b77205c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:10:50Z), 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/AUND02100507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec64f14618d249e07958acc3eff27d4ddf699ab7ed050401f7e8f4c8e42a3521. 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/AUND02100661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc1c12d48da3784e5951de3ebfc60e73fb37854abf106aa0ec87af2669316d2. 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/AUND02200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ea61035524a07d6db898bb200ae689a9a651b8eb486c051b8162f9fb4eaf58. 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/AUND02200185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6728d973f62d1dc197259ce64f3d44482ea919a578fcc1be1c7cb90dddda8ad4. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:23:02Z), 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/AUND02100373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa8d149249bdfe96a9eac176d19bf4ea30dd6f63aacba8a2ed898124e4a8acb. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/AUND02100254.