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 0x136d16950f356a563373040ef00607e6d0a46100fcdb80da63794e157c1a0043. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d99581f3-9e5d-457d-9e59-c596b514878f.json and https://artists.proofprofile.net/proofs/artist/d99581f3-9e5d-457d-9e59-c596b514878f.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 0x28e988e5f5059d8497ab0fdf1ac44e67a1e1378e3df0f2118f4decfbb7bfa4d8. 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/QZS642204015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d677ec6d04a2e0860e740b8c80983c7d56def6f69abcfdfc0481af45509d1d1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZS662296212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1fd90e42fd0794e39596d3e6c1330a4ee21a4f501eb501b745eb46a27dbec7. 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/QZMHN2202639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32020cb969d8e9c46e0cb7fae035b397e949ab43cc7ccb0feaffc20b532ad907. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZMHN2203989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2fb9d564c1ab40066ad4081c91a561d608187791c7f70c07b5a340adb366c6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZS672209062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cca450479747ffa1cc4279a3f272845bfd4635f8d0e0ac074fcb2a53476a84f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZS662295782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32ee1fa375724fc11f6dbca7ad2949962e2106a192c376f9cb3cdc9e2b91b36. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZMHK2213057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c21b405373a1d172ef543befd819042ce84763ce7d0b438b9faacc8f0a471b. 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/QZS652216464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84a6fddf1ced6da6a52aef9932e8276d8dca46e6861a32fca4177804804647b. 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/QZMHL2202245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b64cf791b9b47d137b753bd7b1d9581c9db26f682bb874c63246957830774a. 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/QZS672215917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b80e77c6c7d16527db391524349c2da1c01f8503432dfefedb51181db096412. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:01:25Z), 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/QZMHM2259132.
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 0x637a384a315cbcecdbed5236b78ccd7cbb9d8b1cb95e2c28343b1c6b47e1af7e. 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/QZS662138079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1948cab6991b46a0de2115b27007278e7861b20f00bca1ee9a55bfca07586ae2. 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/QZS632116103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582ab3f0dd710a385677d87bae68286b0ca0766de03362d12f68af8aaffacf7f. 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/QZS662180678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea97d2e2f0b6dc77fde2aff2b82023cb89694ba5b11f49c71ee23655f31bb68c. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZS642135164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6d32cd98074facd6bb7dbbe665e191823b5ea326db99d10b5a7e4a71ceec89. 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/SE6I32474208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779456a459b17392a82f4ae6674507b008f055b18b525facacabc149fb1ca46b. 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/SE6I32474211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372c86152923be7e1fe045acf1b3877ebbece7712650f20f67005d564086ee18. 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/SE6I32474212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbed9c78b067a15676b794ecb35584e5b1cab6eb6c9538b60b2c01d08c88cffa. 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/SE6I32474215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9392a1943a4cde3be14b1372e7a68b7ca3f4b0a419422e21c546953d8951f31d. 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/SE5752442757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece313a8e04bb019795d086cb7ce5b91298e55ba2a6122acecf159adcee67d3b. 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/SE6I32474210.