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 0xdfe4e2e1e0df70b58de2b31c16520e9c3b3df36a6c30cf439dbf15b4eefd5c31. 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/1b05b34a-e3ab-42f9-bf07-6c232f8ca2f2.json and https://artists.proofprofile.net/proofs/artist/1b05b34a-e3ab-42f9-bf07-6c232f8ca2f2.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 0x3f880a1ab7080837bf9dbbf47fc14c1f54cee0d1ab45a44c8caee3df31402140. 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/QZES71989867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5983d0dec02397f46fb55432db1fec7880534c4e76ad5e875ce316f2cb2c7a2b. 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/QZHN91981286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ace675bc44c407ef832c2fbbd5bad366a749e9806b2c7da8ccd9222c4cad04. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZHN91981248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe824ac1364400c0e886bc8ff7fad5e562db2487cacb9d73afbb59739738502d0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN91981285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10627d6b5ba8728c928ba2fa3b507c694a72f8f6def24974e574d21c33fdef1. 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/QZHN91981287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e85929fb036f02d7e4353a42aaf1f28b4e8beccd6e56398c530f38ea7eb08c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:35:26Z), 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/QZHNB1997534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7311cfdc6e7a1a81b69ecd514fc17e1b61b93907b6b31a3144f9fb87c10b8017. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:05:37Z), 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/QZDA82022364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d05dad16961253c72ff7209ba9d6571dd8aeb7936e6fb486a7ad0fef4568e6. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZK6Q2051699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3a87dcb33dc67d5f713b53e39193929e9c4af3ccd0a4aae0ea4d82d296adaf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:56:32Z), 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/QZK6Q2051697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fafa45928c660eebeca27700c337913dca36e85f3810bb5674258eae610d9f. 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/QZMER2012116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3aecde9f07738ec50e1c86e0dd4050f6c7422c6bd93cb84b3a546f6e814ce8. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZK6M2092752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d9ca5ce8327704f623dbc42770f26766e7acab754677d8605575d772adcd42. 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/QZSYP2354980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fb4352f66b7fc8e973163aedd19aaed344e4107835cc4d452857a0376887a5. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZNWZ2092146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1aecfb2f766ff8d5d93a5ddeaa1875bc376ee5a4e3436c625eaf870cf63aa8. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZFZ52148986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2bf978a9ea2b9d14f57903536f23583f0128621017056b4624ae000a3b218d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZRP52171351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1cbe482281608c6b6d173e9e3a1e03fd44fca38a4c8cc5297e2f175a44b1e0. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:29:21Z), 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/QZRP52171352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8437ead87a9e92142f92052f674d7acb08e68458ecc8344a6b7648a93198fc28. 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/QZFZ72038034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378c90358c2e0d8eee6f9d3bcc3666d189bfeaff0e68d8d459443f72afb3d287. 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/QZK6N2212609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105a62006730ff76a524844834b3a7e6ed75d7968630cc37a7cbb6bfa015fe97. 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/QZS7J2395773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcaa46ca92726ecc103b49e0e65b0a51a687e62a3c3a8ef19dd0d77a0fcdcda. Chain 2 (Bitcoin): anchored in block 957826 (2026-07-13T08:56:09Z), 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/QZS7J2324289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5b63818b520c3dea9398707da19f0e7373900ebe107d1da3845063ba94b633. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:44:15Z), 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/QZS7J2310794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac3c4e9db0a08e846b932cd063f4f43d3b24462f9973b23cf93ed24df5e7ff1. 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/QZQAY2402495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa46d3cad0db68e5f33ef430e3bd4bab98eb7bf5b96ab9c64585fbd23868514. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZQAY2482800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b24c7fd28a0e110d38a7d18223d05f0c3c0c7cd7e2963cade1d74083f2da02. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:40:25Z), 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/QZQAY2436613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cba1a440cfe14cb498b363edf0c949ea927dcbed800ccd2d40b58d54aa5c1b. 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/QZQAY2453415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15d549a18d709c2a49a96df150acfa3046f08b641f0ce0245ca17bef6369aa4. 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/QZTL92561945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fbac68eb7be4e4f80c699d7223ea3f3c725af53e040cd0312aca6d79a3481c. 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/QZTL92540114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1880ade482478c401c2420a9538a5baa6fa054969e460d1f94e802c34a81d948. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTL92527326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62083f303129585ee0ac152c369d6f97d8d148f8f813b295814a7a7afa00d13a. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:56:20Z), 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/QZQAY2584153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45adad2c81fe052c5e8389b7dfcd0f1e78d70afae2f12f879c3f3344927b83f8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTL92523779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b70032301b5fc38dc4cc0c24a1327e7bd1b804135ee4772fb8b61a31d598f6. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZQAY2541749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf862aa728b66f9071642c493cde3b7d61831ca4e998b09766f047bfed2e02191. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZS7J2519221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15d549a18d709c2a49a96df150acfa3046f08b641f0ce0245ca17bef6369aa4. 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/QZTL92561945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63e8a2599185cb5b174849358a41a9f983ec841c6b760ab0fe4578a280eb136. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZSYP2331474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17de70df47130fd36ad6b5c7728ff9b60e8820cc3fafb4a61da3685e0d304085. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USHM81464504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672c1aaeacfb18b651fc9c2816fd3f2350d383687887aa606c9690af808296fa. 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/QZDA42374222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672c1aaeacfb18b651fc9c2816fd3f2350d383687887aa606c9690af808296fa. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZDA42374222.