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 0x349af4ad0e61092aa513ab6ec2f69e520ee48cf0094ab75d517083301bae10d8. 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/fe604675-3a57-4707-9b96-e36eb4ead850.json and https://artists.proofprofile.net/proofs/artist/fe604675-3a57-4707-9b96-e36eb4ead850.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 0x810cbedda11435b0300cf0c26258c967cdf23ce2196efe449975bd5ce7ec0374. 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/QZES62002256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33bdf5716fa8fdb8fb0ab47fa32660653b1f2ee4d43302455b11d166111a9a9. 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/QZES82078047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dec40c7c61c297034b7cf66be8c5a7ecd2bea836c137857b93bdfd9604f5425. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHN82023353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00f7afc7260c85368e88f4ca0573ceb1071302db95cd64f548e2d768c463ee5. 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/QZHN82023354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fecb5ebe77e35c79d898881687ec033bf14bed3b4df230ad30b146761004c75. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZK6F2039680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c226ff84a173dd22981190200c7fd2e9445c232ba4be5ad7d735b7ad58738f5. 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/QZK6F2041991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4d78999cb73e12d4526bd32f4325ca88d818ea9dde93c3341ab9a4b5b630df. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:08:35Z), 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/QZMEM2052731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51eaf9922e1906b2e854e12cd7160f1665e60deb29e980e4e92988699d702be8. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZMEM2048447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96a93174c00f874822f759704f6180e017c7cb84ef0f0d19ddacc3ee7e8235d. 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/QZNWW2026210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccedd047d5e7ebfcaf420243b7b893c5749c248101985995d8f97f8e65c44227. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZPLS2006097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0b9a66d0ec178b45006e86579a9bd3d9a428e80aed9fac1494b8a28fbfebcf. 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/QZFYY2137641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd052fc41ece141add78736a76b62d3fce816f7ff624a04859271c80d0c3df7. 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/QZFYY2137638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc490ee18863b83e02b5fe65dba60070d1b2150d44aa7249e1ebb3d9c26d90293. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QZFYY2139454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647b68ff830c30dc0d37d97d8139f61ebc25450e3be7cd88fab9c192baf028af. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6P2147906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647b68ff830c30dc0d37d97d8139f61ebc25450e3be7cd88fab9c192baf028af. 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/QZK6P2147906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc022343c139a9749c34ea3561ee03a44a1e866976b1b73bb0988a96ba86794f. 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/QZHN42245430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be9e2dec9972e1b7478e20b0ae336f0cddb2511ccf3bfeceb2373d43393af45. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZHN82214712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1918693448f00efb819ba0a20c154d7ebb3e7a6c2c532bf796c0e37765058f6. 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/QZK6J2254354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e1ec58c0f4961111b7875ea23ff0d5522c84f8c98509714280e90e3100710a. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZK6J2213105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9116d47b229ce2094978a4d89e0daa9bd860f9947854ace778c1541308fc89d. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZMEP2286729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a091a2b2b5e7d5e5f91270e25f0b72bfc2641d2b0facecc3ba39864689dd89. 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/QZTBA2231787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9116d47b229ce2094978a4d89e0daa9bd860f9947854ace778c1541308fc89d. 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/QZMEP2286729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb41900fc67e3456d0674bcd224edaf6c55be1597b1df3e364e8d78906daad1. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZHNB2357663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa48628e7dd6b6f8194c2e191de10684216109b7913cf87ba27489bcc2c58c0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6K2375959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440303d152651ebf9cb49564b25fde2c20fd2386bf03230b993d2e7eac303b4b. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZTB42310544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e083d4943de1bd9d16c10bbbeb6449bb4c812b27a5dd27855001f40f3c0ada. 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/QZFZ22405770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bf83528951879e3a73dae0771b4185cfada8f3a26dc51b597f552f931e3070. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZES92412967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfcaa703b4274f507f5c2ffe22b14e8ecaf16311f2633f5fd5ec7a8d68d00f9. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZDA62426843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332c83690bac3b1c5eab29b151b40c98aacf277b792b8771fab320654d105d4e. 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/QZK6P2452257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c2c896e37019cabf449d94d265299a9b0f41fb99a71c71809cef50092d9151. 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/QZNWS2495620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040cf6eeeea7d915ea967791e7c12c6d4bb129901356798cf0d753ba984bce2d. 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/QZWFN2442253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf157f3204078247d00a53e9f6a11ee598a94dd67a6d34f6942e4e534aa07ea71. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QZZ7R2479744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce97f6e71ce2cc1636c1fd4e8cd7a2d18b2d754760019bc5fed53b5b6ef865e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:01:26Z), 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/QZZ762473939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040cf6eeeea7d915ea967791e7c12c6d4bb129901356798cf0d753ba984bce2d. 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/QZWFN2442253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2332b4b964c99c74bc4f5e71480a3ce7765e6d89dbbcda2b4c87ea7f4468dfb. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:05:39Z), 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/QZNWW2519928.