thumb|Ochre pigment Ochre ( ; ) is a family of natural clay earth pigments, made up of ferric oxide and varying amounts of clay and sand, ranging in colour from yellow to deep orange or brown. The te
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 0xd5ae31f1768d84e10c327799a3e7c6142fdf092159e86c85e2e6177613a2f275. 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/b45a2fd7-50ed-4889-9b32-b53471540ed3.json and https://artists.proofprofile.net/proofs/artist/b45a2fd7-50ed-4889-9b32-b53471540ed3.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 0x9f5aa033ae7da1c177e936946c94b0772d7416ca53e2575b9f92c9afe93e72e1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBMJG0900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13328fe5305273ebf72541c8f9d4e2e7c4fd12ec424582b66ec5c7f5d48e2ec9. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/GBMJG0900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6125de137e7b933da653300b6f0887ac196bca92c1f432577477b0499c352234. 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/GBMJG0900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1223a7fb8e9d62ed99fba2e8edaeef4391fd4f288d2345d6c75c7eb2aa9f353d. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/GBMJG0900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee77a615f8d40cfe67583af2cf56ba13252d2ceeef540bc204605057b02f38c1. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/GBGLF0603401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb2a41a12eb42c8b562c358029d538c1fd1748a7495b142295e695ce1b4cd8e. 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/GBGLF0904805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6126d841e9f07a2df00780b7c76e9b4b8f13a29ed9360a1470b2dec8928e8f87. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GBMJG1102418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77cc19b77091442a06a328ce8aeb09252c1e4441692a309504754eecb075acb. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/GB6Y81200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381c486d8e961fc40f5e1a0266bb45e01d59ddc560ac88d077a2b05851e9743d. 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/GB6Y81400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x783ec079ed674c4912a4054d4b45f30f6014520e6b2de2a2880d3f5a31861780. 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/GB6Y81700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26001ab83dcc5c9255236e74de03c3229adb24ee44e06e3e2cff5c01f6adeb08. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GB6Y81700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec775297718ae845a01916f907b64cb2bfa395d3e4642a691a83b24b4c86f7c. 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/GB6Y81700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4260baa1bb811257ff76bc9c8e578061aaf4d7ef25a9555cacf53a50a4d8fb20. 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/GB6Y81700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0668a6620adc088914d0c51af06b3a6ed267e1ae1de9e28c464fa23e614e5c. 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/GB6Y81700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d0f785a8db2ed503a643d6527046161ddbde70f638b8925f85a829b19b1a4e. 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/GB6Y81800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc87658ee651fb1a531f2090ad3450d70fab5f8a305c2baba0bc924903ca411. 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/GB6Y81800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701d1b71806178bbb1d21ab7930fc20e383eb6e3f90ea62e156c66d3f1db338a. 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/GB6Y81800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a80a86a09edce9a684efd2fdb98b65a8d3116513b1c0c3a4e8cc59b5864ab2a. 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/GB6Y81800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee0263f7f21ee8d4c353e8873ad7dc3f4b5466fd478594b574b04aa1fa48b9b. 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/GB6Y81800013.
A Midsummer Nice Dream (15th Anniversary Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a3e2f0cef369be68e4dc64dfa5aada6d4a5c1d63aeccc997a390dde07a0938. 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/NLQZ42100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d690bae3bf9f49d4b9c95d31f7dad35bb6ed1b623a5a9a80ef6985677a9d522. 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/DEBW22500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefc20e280bc413ad91aff79d1581065334468d332028bb5ffa2b09e3ff6f379. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEBW22500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8fc7b3dc903d26acfa01b064f91e3a360f2f574f972c1c98bb31962fa307fa. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/DEBW22500011.