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 0xc4dc4aa3b0031818af4b87906619e99e66b37c70eed4009d467b65dc9d01053b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff1b5920-9b06-4a8c-b27f-85cdc536267e.json and https://artists.proofprofile.net/proofs/artist/ff1b5920-9b06-4a8c-b27f-85cdc536267e.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 0x534e58e47f80445f390139e7af6cf406756042ada67e06ddc74fd01447058413. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBEBS1000137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910e6bcb312908f432fde3430fcbcdc164d7f6b514aafe83d55569b5f7a1500f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBZNH0200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa59ac6f9d7e1cc38c05035130d080450b9b0c2f2fc00642684f16241d87043a. 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/GBZNH0200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53be57266678d2ad2b8ce30f7aef5ed05933a698ae51dc084d96018ae02d78c0. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBZNH0200023.
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 0x8e0d4b08c712c96066679342df203b551c22aa4f58876b451b55811660758e77. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBEBS0900382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066d51b5d86b4fff288140dc3a04879cb2c3fee458e73e50dd0a6ea041229014. 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/GBEBS0900383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dac6233ddf11d0f8e8b26c3035f905f325c68f5c8f6aaf19ae575aecde8dc52. 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/GBEBS0900384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9f879bb7ad0e24e18b0c0983bf4efeb86d3c84ce1de86b7d70b57cbe1f53d1. 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/GBEBS0900389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a716983817bbeea9f280473369ad6d53c0e8382bb9c24512dfc257a959d42c. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GBEBS0600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55d089fd4673dd08e82fc60f135552feb6871bb7cb61020b041ac90f7c4422c. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBEBS0600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02883b27795df964e9aa4ee0e420392b00f55fbefe02ae8a5a4eab11a6492960. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBZNH0400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5912a5782ba91fe393a82d10be50b1de957ac5431d0650f6112659237979ffef. 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/GBZNH0400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed709d31c6b74a6c467688ab2c0caf36231d228b23527d8d25bfb5847772773. 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/GBZNH0400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1798f103a072f958d512bde8525235f68ad5f5723abd25ba9b3fc96857b9c461. 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/GBZNH0400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ad71a86e6bdb6aca14903da10bd2552d8d8a14b9cb8b14af79c8ec44ae31ce. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBZNH0400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2893b18d15e6e31a470c5248ba4fa5b118a42974b9d577f2e51df17558caefb7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBZNH0300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2f167df3d37f09007117bfbe7a9c5f1d85ffda1e47a1af5a130f5ece81a987. 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/GBZNH0300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe1d627761fabe9543e58737af04ddf54662c9c2271fd88850c749bbbc3ddee. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/GBZNH0300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85433f17cc720558d2619848c8afff0c888c5fa44533bc6d4efe3162d8216854. 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/GBZNH0300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ad4a4a982100a9c18b4e9c3ef4ea276de21c86dc8007ae9479a42198533a2f. 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/GBZNH0300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49ab91d7af5ce6535ff1835e4d2a56b2b44aa2463f6b659fb25f1b0c1d79422. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBZNH0300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85b0bea8d3ae74b8153c55743bb40e74d70ec156e2fa3e5c2ac3aa9b4dc105c. 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/GBZNH0300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5fe40c7e9f37e42976cfb6c05f9bccbd848d74cc151f156696348bc068c41d. 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/GBZNH0300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8868a752a2149257245f2ea65a58727b55c0f05f8f3cfecdd15fdd69aed9b7. 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/GBEBS0900570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacba44d06f88bb04d5086c981bdf66796595c43aba16f3ab8c465de1a5ed5e9c. 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/GBEBS0900571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d9b086846795098b49f57ea0381f443fa65b05e8a2667351113cd190b1be6d. 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/GBEBS0900577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fc31d02a6bad5a0075478e97f6f74da3c4cdd57284648e691b275343b0eeeb. 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/GBEBS0900578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x259e1228770323c135345e4cf6b6f465befe84b52dfddd6dfeeb25b770989d9c. 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/GBEBS0900581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215985f453ac3a238f201dbc5dabd740cfd2169ed79c6349c1a15eaf9c4488b7. 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/GBEBS0900613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96df40255214cb0179435adc6d1ce6067482aa8a94beee053dfa464001c8e4cc. 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/GBEBS0900584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab682e7241aa9a0dec69f5d34f8a9ca2fbdc3c64fbe0158d0bca6d9a1e31daf. 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/GBEBS0900590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420c9ceca86e18482cfcf636a9971fa606e613e0bb2723f6f5b8e3f6ea622ae3. 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/GBEBS0900592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891cd96f9d2592d000e6b70744e2b64d8719ab8312214dd01402528aaae28a20. 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/GBEBS0900598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4352f0e83f3f67b74eab538574b84b5b812c74301f13545d05cc560b59e9c89. 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/GBZNH0600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c11f4183527e6bccd69ebe4610093245283604585a686b8450d744d6b45bdc. 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/GBZNH0600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcadd22a0202dc23696cfd296a0bb7dc5547eda94d3ba47e3171f126736ac0df. 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/GBZNH0600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb5b1e1474cb01c5b0b76603610485708cda6a519aaa1d9fee4e207c351df88. 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/GBZNH0600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863352ca64d253c4cac432d7a069c343e3ed805a73b5064bd0b3bbc5d347dbab. 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/GBZNH0600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcc2359cf15f3b25ab547d234f1db6513259928ef1d05c3d814672ce93b774f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBZNH0600014.