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 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 0x8e7e4477d7fa099aa25688144746936382a49bd861e7a8f36dfa0438eadc16ca. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3660440-14ab-4e32-a00c-3535f12c8218.json and https://artists.proofprofile.net/proofs/artist/d3660440-14ab-4e32-a00c-3535f12c8218.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 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 0x42c0f190a4fabd19afc686d839ccacb246465d035527c42f15604fb99a8b22d8. 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/DELJ81739707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8b755096b81fc24a04bd9dcb2586bb651425adc42d1d3699920dd7e993a64b. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DELJ81894171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0941901ba72d0531c4715e9933effbf1c1d5c33e5d9d5f7832948c2b893a307. 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/DELJ81823855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb555810a673a96ffd5da286ae1d6fbc3870601a34e9e4ca1f56c2a0e3defbbb4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR59R1961414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d08cfca5c72b8642e20fe46988d9c7155adeb4497090a4bc13cfd85867bf750. 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/FRX201936697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08de0f2d21a9b8e74c7cd3174786094fe9e1228ce51bfbfe176246e7201a7c85. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/FRX201955058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a763c8ad65bdbc986c83ae5c62660525daa3098c1aba12044cb2bc2a6e487f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/FRX281911705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4f47a2ddd0192a370d7d549505a958ca2df4faa0372ec2c67a2aa88304c99a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEQ022110914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb30f3b749d34d510e2831af396f8d453968daec60b9cd8d8d79fe2d0c4cc2a3. 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/DEQ022110593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0813e9de9fc4cd1bd87df894520133520d369afd2fbd3cbbd8a9d41f4dd84b0c. 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/DEQ022003916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebe2cac566957882698efd28671a8b6b2c9cbc2fb17a3ebc4e8c1525ebb5875. 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/DEQ022110432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0982660f6ee5ab3b9657bb2f6f68f77d0608541ef26e1b828264bcb12b36421c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/DEQ022011528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fc24e6dae31c570e0e5b667f0a739eb2e5cb345ae4c50b5852cf5c2c8c1382. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/DEQ022010339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6726ab493591d6157c128d2db2ebfa694259145b64f0b683ee9aba70979b9e. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/DEQ022009699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d566b9dbbfb0179907142ed324003dcb44511fd952d8f48a5b5db9a75f52f1b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEQ022110172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f3b8ffd11efbd268e28b90bdee7cdb2ead55c5ac8534559cf8a3088f059737. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/DEQ022101188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210b8fed0f751a6341f17be22d5df3b0eb5aed466fec4701f0f6f2d7a63bea8e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEQ022119362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35af2d6ddb0038c3a93bf59e52620f2ba37286fd5105d81527989e627091783. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEQ022280854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a8e0582cd9328843c69fd4d0ef004f298fc5258d9f4a8a59820fd7b5a5bb5b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEQ022119575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455c05aa0a6b4b7c3e0c4561e757d11f5b94b89050944614260fc9ff71659f62. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEQ022280332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d20c0fc5118ef01a90708a7a0ac3f3270f9d1fa0c47ca7d97d5ae6c3f69c84a. 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/DEQ022281384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f89d0f6a74602fb900cba546db26c23566e301e3ee3c14f64d4084ffc8031f. 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/DEQ022271683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2cbe18b19eb55d0560990bfe3ee1872a0196688dcc4d645ff2906c282cd30f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEQ022292119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd705e725e5853a9a200dfebab3b3c296c4b1dbbc9432189237e9f9e66189e0ab. 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/DEQ022390039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fecbd06e520c07ea08b206d620d309910c66c7b5820ea61a0db21439bda21a. 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/DEQ022390253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eeab45fdb36f168f6683a12910de11412ed591e8b3b916b36fbd2043b129523. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEQ022390254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2828db93b959333ff298049771f8f34e1dbcc52e395382f296b3cb6f8bc022. 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/DEQ022390255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd82487fe5f9b8483bd998354433ba60e54e175401239c82279c9fde2a51aaac. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEQ022390256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2cbe18b19eb55d0560990bfe3ee1872a0196688dcc4d645ff2906c282cd30f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEQ022292119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886d66df204b1588a9c07e4bf991df38bcc174db4fc8c91c7840b1dd91887a80. 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/DEQ022390258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66db89e99e8fcf53b0ac34a82281b29c24930a5938908b9e953e8390edec8014. 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/DEQ022390259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d11f48d4d0dfb4dc976646c5e5b0a70cfe381ad6de7a1c927f3e30e4de24155. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ATEF32100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05961937c05ea18c41ba8d925f2c5e41156fd133024099621e17810107f7f777. 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/DEQ121750188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d71de423fb740266834b1dd1dfb984bb1f5503d3fab6f374b108475193c34c2. 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/DEQ121921006.