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 0x3e80d1e607ac0d363b81430e35a72fc777eebebb7fb135075e54de121f9e91de. 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/ede681bb-eab5-4861-862f-5b4471a3bb99.json and https://artists.proofprofile.net/proofs/artist/ede681bb-eab5-4861-862f-5b4471a3bb99.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 0x0cebfa162c998e63c572db26408ec97b82e5ea7b09dd169fffabf86bb17e2f55. 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/GBSMU6859078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ef3134eb44cecd864c26648ba2c0164042f03b63caef8d71e22eec33d89c8a. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:11:29Z), 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/QZFZ72015858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46993fb13285bc250e29920804e3bb068aee37a4ea31f77add42562b12140bf5. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:17:42Z), 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/QZN882135277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc05cd9234a641e82c218ab2ac31f455f380242a0208ae3090b5eec9c26f79b. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZN882176650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602d05aebc0a32f1d8be8972d55ff1e377659f0aded336f2a10aa9531e75c45a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZN882214721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc05cd9234a641e82c218ab2ac31f455f380242a0208ae3090b5eec9c26f79b. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/QZN882176650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fd9ed368ca82a935ddfb4781018fe823bc8fb66644f61622cddc6ebdc5a730. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZN882182732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0e4627d4b43ad347e919beb8df5d3bc5cb2f85a8a048333250f85b67624fd3. 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/QZN882231797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0770c1a5277e4e1da7235ac4d041dbceaa16308048a4a4f15b492eb82aa76d15. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:05:21Z), 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/QZN882237306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368d70e8039e8118594b4e58b868bc8a7bc66275d191392d3d55fd61130fde13. 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/QZN882340542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75616b433310f38ce1d06ee41780488d8108d0aa30a19dc86c4dc2b6b5d5f72. 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/QZN882344201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714e397b3afe91720ce7cbe7e305dd78af6bcdb716612f310211006b02e865b3. 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/QZN882344202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d6089bd778fabec13dfd1fb8f9a7b1cc7e9aff62f47a04b7bdc87d2f3c3b88. 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/QZN882344207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2ad8b7b6eb0055ef53caf3151ffc4ddb2aefefef586f833b07dbc56f6049b7. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZN882344209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ec1731d07e76dbcdf0639c319a1e5f3673454580aca6f75c39dd5d1e688df3. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T06:31:41Z), 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/QZZ662339742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e342633c7e7e0d51d53f9d8c2b06c59cfe360f3c146b9f85d163ef87e7d047. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:35:28Z), 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/QZZ662339744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117e87d126619cbdbb264575af5a442fb7453a05c883100d068a6556dddf91ea. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZN882415864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75bf26526a168e41d87d7407b4fdbdf1fe378a156fee5601fea5996752f33ba. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZWDW2506002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172832f6eb4aa391da028dddd455dab7e896611ceb06a62f85c519accb60e2ee. 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/QZN882185227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f1c61e7e1a84da12cc824922af3739e2940944d756790b9c0ea4893776334d. 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/QZN882352422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddbd5ce05f9088f42eedd8abdc682a5bd0d8c1a063d2346b4a0202dfb659ab5. 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/QZN882352416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c2c265d4b0732ab0093e62e808539a8948d5e43ee011034848ab54a9598202. 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/CZUM72100943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cad11b7d1b9a7d673ee45342f096b166883ed0e536e20fca4a7b480c7997cf. 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/QZNWT2028506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d1e3ce030050e12bfee29521f34c6b8bff988a8c91d9f8fbc6b6fa343cc501. 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/SKP592300068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47f5a399c7775e5931d66325a6b749545c64a3a0fa5367da5db47d990aa5171. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZHN62077371.
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 0x3e02e572379eb25b3cb66c5ff03fef05b19fff0a10b0af0ccace668da700a683. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZN882185248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9a32b86dab8b0468029fee4d8392284fc9052de5b87eb8f0b18ef2e0031342. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBKPL2156054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a15e7a870a21eab6ca4167167b27e512094f5996c8e7dfae3ca85f25f0cb76. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZFZ22097501.