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 0x0110ea3970c94156cf07732fa7aa4efa7dd98b846b396206a085e9a393d950a5. 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/19889238-5f5b-43d5-9c46-7b59c3a275eb.json and https://artists.proofprofile.net/proofs/artist/19889238-5f5b-43d5-9c46-7b59c3a275eb.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 0xc104bba23795f31306c084b8c421ee5fe08292baec51a081411e0d770f59224c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/USA371060761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de2b10c69f67ae41e3430b24c3462ffaf2531fd6418248c02dd0fc99ab8a6ba. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USHM90832621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2f90edce05e73cd5f46faec199b6c31598a873a41c941a85730a33508586c3. 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/USHM90832622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd9fbec53cd739713114fc090750f1a2e15b1afd4027f3ed872ab660c249190. 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/USHM90832623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70d2655ab37c484bb4da543ca5d93875bdd7ffa51c789ef8273d3d1b70fea47. 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/USHM90832624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4bce5a14882830a80fb7895babba1d960c08a6c05e4cdc07ba65f9f120e35c. 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/USHM91035206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6759db9d3b915510109ebca479e47a06fc3881e21d2992c9b724bf2e0404c8. 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/USHM91035211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad9d10f504bd55fd9bb032407611803d992721afe37a5a88160f60e22488d28. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USX9P1217467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cec33d8578605031a02d732e35d353fc7fe1aef2def9544d7ae4f327dc1982. 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/USX9P1217468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34db41980d8c4b5b8f3b14c557618bdce53fb3a27f776620b2df4b4e5d279032. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/USX9P1217476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8819cf062e6227b49c4e46a1ee3320c377f26e0aff5c63836ef488a8fd98a56c. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/USX9P1217469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ad4b3f84ad6c44bc38d4114c141185fc0ea10d8477f74d8b0c290348841843. 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/USX9P1217477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf0ecbc4b193aa58ebea77764c086af0f5a2a5e1435c64c2be71160c0e39067. 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/USX9P1217478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7f77a5ae1be584d7c05e1a119fe9d4b3349dcf1696ce6663e8878bc3354690. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/USX9P1217470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbd7e73313d8aa2e241d6445a43861d282256f93268fe50c1d41ab61afd60c3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USX9P1217471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e8d1a4bf8d08a5de5f76051a15b93e7fff8ecd07206df6232363264c272dcb. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USX9P1217479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cb5435a26a6e25a7397b31c8d9caca52fa2d79ce3f970865725019807fdfbf. 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/USX9P1217472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2908aad2fbd056eee4b407e8b3ed2f8fc7aeb12fd4c4ba905d5fc46fa4e98175. 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/USX9P1217480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71845aff217a4d4d64473ee0e3cbd970424bc5cb0fbd7c22c8dedd7c04fdebf4. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/USX9P1217473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560cdc6df3cb3080a3025954d30c05faf2b935346dadc108851f43da76484159. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/USX9P1217474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6f079b2997c104681f33da60a09add2f680e3bb49077162615d4144e1f338e. 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/QMZ7C1300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4887e055d79ec9131b83137c9781b3e609cfba56f043dcdee19aaa865979c71b. 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/USCGJ1513080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcd1e189287d9b9d9493af66a26488564dfb8e7338ff2ee509a9b528c8d03e3. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/USCGJ1513081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289a5a2e63af82641e254a0fc470cf6439bf85605a9e962c506aedab38652fa2. 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/USCGJ1513082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3e9f54c0c74057dd4f03651af4357fc2a4a3acf1c028ebfc78fa9dc074687a. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/USCGJ1513084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc5f84f722a2059bf099e4ca4a54265ccb555caf64312e22662131729c5d05d. 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/USCGJ1513085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3e8ce7d83b2e0c52f0301f8953702608ce9e533967bf6c9059b22421d3360e. 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/USDY41707051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af0402595a2ad9dbb6414e966de338b03685aac274a1aa892141ccd4b3c413e. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USDY41707053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa582f9f5043f90226e021fb74fdb18a48a46fdb02c34964867fd607a6e0555d8. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USHM91733331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14799b708d75f9b49c701d45afd389f012dcdfa7d2f52bad4e313c0f6f953e55. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/USHM91733332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb34037e214ae10986652105b2dbb0a7804b604afcfecd25d6e685b3babaa2d3. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/USHM91733334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9d4f5ea402edd122d2719ffbe3d477b88dd506af0a56d21b0a47a22bdda4e0. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USCGJ1893833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6af4742bacf96f862a58c21ba6b2f823ed83477df761b0e3c9663e099f4ad1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USCGJ1893835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02edcbda65d9157afc52bdf745f00aeebd2a9287b5fee75766f92e4b63a9eaed. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USCGJ1893836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ec7f81c18c38b6403a59853c5cbfb250990d7a4fed45cca076b167d334dc0b. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/USCGJ1893838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7cc8f318f36ae04f83c8608b90195cf94fc0b985d338a2c991d17bb50ed337. 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/USL4Q1842510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa025d4f0260bbbfac11cfaab26dce94f777b89da0b1d47d7318bf6170659f6ab. 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/USCGH2182136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892bfa58d3cf027bc7e0a04400aa988e485705eb0fe181f2c6a707700037fc37. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GBPS83868217.
Fragment of a Dream (73 Min Extended Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d6722e9becb72ccc9737c84042a45d8672a2a341d45478c7fb3b4806314373. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USHM82458547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd312d6e56f8e4b767456c92d186b072cc1484e0a283e7b993073887d55098f3b. 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/USHM82458548.