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 0xaea6a1993e1c139d414b2b2ac944f500ca411b23c163583e06013c1bc94d2f95. 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/cbf3bb1c-9bb4-4b77-b890-31f4c2c11bf3.json and https://artists.proofprofile.net/proofs/artist/cbf3bb1c-9bb4-4b77-b890-31f4c2c11bf3.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 0x3317c865e286edd0d3f21f87ab4382046cc38a3e982ab2044519158cc70aa91b. 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/SE5Q52102157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccde9f9ae9be32e7fdbcecd9908068ee02d224099d0ba1c1cf5446b1c3965f08. 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/SE5Q52102107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53566654ac85e471312fd2014493081b8d3d60c1b8c800d5565ba025b99045e1. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/SE5Q52101941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8118fd01e2d83026f5387b3a5d40ea69243653b74de151d97f251d4a40e333. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/SE5Q52104418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d90715f1cfc95c3c1e005491e6a4a37ab33ae0b0e963c2b05bc41a1c22d7ae4. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/SE5Q52104312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bbccaf5e466d78bd24c3acf96556d6aee16c7eb4ba530ab3b91bf35d749d70. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SE5Q52200451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b962410ee7807e955e29c72f4d7b80e35cac48001aad407b49d50d5160f117. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/SE5Q52202557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b77a349c35b07da455305dccb81a2d867e736c38b677cb2f34cfd96e898336d. 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/SE5Q52202052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b4f2606716804f7954a1c391b7dc30a68b41ceac35e508cdee2e9583ac7a8b. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/SE5Q52202513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3c0bde996a42f803ab673c74bc5254a9b7ee6ddd9d44816cd4355817438765. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/SE5Q52202633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e733521d39d6a85ec892fa312cd41e761b340d1e224c50709c9bc25ae2d9bb. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/SE5Q52202634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb851d5c312cc350e8b2fcac581bed55bd37b45390b5affe64e4ccb22ed8eb0. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/SE5Q52300499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecd17a11c9e203a52ec02a9a0561eda5a733573365fd241879fd6579db339c4. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/SE5Q52300194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce9756b6ae2d903e2152c6be91baa7af06614ad5e3f8880c91bf9262a33ca0e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/SE5Q52300546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e96eb525b6f96aa3d0cd54a0f82282225de9adc232852f2b8d3eb925ff0886. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/SE5Q52301910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adeabbbc6bd3564489031f833bbc288eb714efee15c73bca5d825db4776272f. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/SE5Q52301922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2fb6cff1fd3c957f098c3796d6ceb70bc2415879de2ff04abbc85809aa3fb00. 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/SE5Q52302956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfeaf931041f122923aedabd5fdb14f0af69474e05a1ec8899f7a01d9fd2637. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE5Q52303180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fd7eb7c905e0534d2077b0391fc724cb6432766b33466e056bf06ba7c26db1. 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/SE5Q52303318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ccbe420c59ba94dd99c927b56fae73fd0b87117db8d27335d40722ee139530. 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/SE5Q52304641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf117cb6f5ca325d6198a05cf44ac9911fd24bcc7e97089219885e2068ef7a630. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/SE5Q52401999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda4799292a76a82e9afb4ee9310c03fedfc148d6539ca5d996860f309a7f273. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5Q52402102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3583c5d82bc4df193aa7f450c09fa97dda2678729089594960e75f8e8dc28630. 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/SE5Q52402103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1f8fe132b26eb37617d03e3f7f842086dba65b7ae02cc2e7744553a2fb0cb0. 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/SE5Q52403573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24803d69ed9f2bdb53006c99a01c75e54e7faebbf094004400fa67c516e625b6. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/SE5Q52403570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d531422d48734b20577aa14319c0deb368c5bdfd284dbb685d9722e3cd2b194. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SE5Q52402710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaba6bb30cae41a997a457ecf0f95deec07b9ad987bb7d610d5c7b66baf9eb42. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE5Q52402711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb0b9e41e19b54a5f25c2740efc34df4c7aca01d485191e67d01c748f11fdbb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SE5Q52402718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x385445cd86941fadb2518b24f9c62fedd89eb642bf804691b4670f2fccad9d58. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/SE5Q52500084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5210e37d4a1f261e596d4e6523cca5b46558ddad49c40e9b5f382cc3c414ae33. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE5Q52500083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf17dba0baa380d0852274a09c1a5404cb22fcb5ae6d40859b1f325d608692e0. 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/SE5Q52502152.