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 0xf8e44b979f5026d11b5ebdcddd606ba35e3835d2f81d19d139632730bc3b4dc0. 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/f25f7a62-38e4-4b3f-8a46-f05f69e3905e.json and https://artists.proofprofile.net/proofs/artist/f25f7a62-38e4-4b3f-8a46-f05f69e3905e.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 0xde54766ab2240a8501de5e15e67c0fb594eb3d5c323693abf2bd62188401d1b9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FRX762035988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d25d32740a2aef184db1ae294482701bd211478212bf0a3c136013d65c76f43. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:29:24Z), 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/FRX762035989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ef48adb16d1469a2acfee4ad9aee2ddd49a9d8152e4dcb1826068da774fac1. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FRX762035990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af098f11022e6fc878fd02284cc4fb2dd0f3cd3ee6019756f965d17da51b478. 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/FRX282123656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee55ff89af6eaee0da2d7b11916fb39fa123fab70c685b9c1ce6c2be334272a. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:22:07Z), 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/FRX282138435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74fc23040918b512b8f14b6a7ba878b4a8c103254bb872b7d3f37336e1dfd28. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:52:42Z), 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/FRX282124005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe165f4805ad7f6983951da83d85a888d272bc86c9895361299364675bf71126e. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/RUB732021581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc138abf9295ea3d9d8305878bfdeaa394bf1c1bac05733bbdb352e5e92371047. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:50:30Z), 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/FR2X42220397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d05fef1d4d09cf4aa146e6553cadb22c8d0e9c558a2ff3b0e95cb315efa351f. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/RUB732035255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4079367ef6ecb4f7d81887477a1f7387a6696dd7a5981471b38d938183e28d3. 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/RUB732035259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9534e4b2da6f612c05240161e9bbef2af6f955d36bc0952655f2bb720b69bf4f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/RUB732035263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17faf4650d396544684334faf40144a50427c4bfee3f03168dbbd688e3f91e9d. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/RUB732051392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a029ec0c3aa195c67a7158a58a20b9207cfa9a919df28d5ae6ca4aebfebfb60. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:32:39Z), 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/RUB732047316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0bb5a8fc3059444c14b668cc8442c459104fcf52a6a264e3cac347e45c966f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/RUB732035253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b024bb8d5cd47869a6135ceb812f8e891b847fc60cd3a479659da9d8708c7e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/RUB732070280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2173051e1025e47742dbeb831dc0c460fdbeedc452ef936b35009cf407f6f7. 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/RUB732062656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d544d306714768ecb658c4a72ba9bf98ba08e413400f9c77a36baebfd3e59f. 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/RUB732085915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7d471c3afe5e039a901f0b4263931497ef98f4255f4a214d92ff271252852d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/RUB732035247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750ed5f4734f753f9c1ec2b96ed97d2f5bbc973d28a98bcca0ababe493ab1704. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/RUB732035249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a56ada74c6c3d03995dc0e698fb332a2886c9f3feaed2959935a4b13e75869. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/RUB732035251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0bb5a8fc3059444c14b668cc8442c459104fcf52a6a264e3cac347e45c966f. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/RUB732035253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d05fef1d4d09cf4aa146e6553cadb22c8d0e9c558a2ff3b0e95cb315efa351f. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:49:57Z), 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/RUB732035255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb59ab5831715b9b1324996caa9abf65f70ae8ca8cbf34cd96bc33ae9928669c. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/RUB732035257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4079367ef6ecb4f7d81887477a1f7387a6696dd7a5981471b38d938183e28d3. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:43:25Z), 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/RUB732035259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bebf1cd97d89b30085d4a6490e25d055d4bfd121de595e26b37a18ab2f9f76f. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/RUB732035261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9534e4b2da6f612c05240161e9bbef2af6f955d36bc0952655f2bb720b69bf4f. 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/RUB732035263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17faf4650d396544684334faf40144a50427c4bfee3f03168dbbd688e3f91e9d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/RUB732051392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b72eb89e8f39fd301d7263ddc148fdbfe475661fb7dea9b4c85ebd39587d3bf. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:34:49Z), 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/RUB732065270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c048c8457a3f4679bdb6093b8bf846fb07bef2a87381be072b3fb9140abc63c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:48:47Z), 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/RUB732080914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffb13bda76c33448ada57c106064817721076a3a99eddcb4f738206ebfc865c. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:47:50Z), 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/RUB732062658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2173051e1025e47742dbeb831dc0c460fdbeedc452ef936b35009cf407f6f7. 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/RUB732062656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef70479e8372997705f9cd7b64c3b4ed53b1cb8d7313f528905723fde1acef0. 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/RUB732065274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdce47bba6708603b574b58b7e3fdc07b63a8362e272b5ccbc6fc3db3a35d9b. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/RUB732052083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62713efd25f2767c250b0f3fb376a4e9109eb6d0835aafaca1acc0e5ccad25c5. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/RUB732052085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535304475572a60f3fd4b999410aa88a6c0cd30022c30c352eda9b7caa8a7eff. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/RUB732075842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5e02221bbee5930bf7190e7c6530470b98cef95835b19b107e89c8483faa90. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:46:44Z), 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/RUB732075844.