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 0xd902428ad27887e613be165dc98853c460ed30f457439f979beb365e7bc514e3. 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/83ffb458-ce6f-4296-bc93-5a7cdf791be1.json and https://artists.proofprofile.net/proofs/artist/83ffb458-ce6f-4296-bc93-5a7cdf791be1.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 0x956c4f4563d012c1bdb23a88ee985017ec1e75940984984f86f4cb6ba4b526bd. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZHNB2403145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33074ef76e4767eb4abe7e08577f7b6d87a729ba97b0415b9591611d12a3a777. 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/QZHNB2403146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152d45bbc44ec03d0b499859af6aff5ae4f8c5870a3afef3c98af7e4696ecb2a. 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/QZHNB2403148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424fe8729b4fcc2e9cf457437fa8d98fb1b495f7aec8f03fd8bf83a261a69404. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZHNB2403149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef84382457a0b55e220aba90756c9fab8162a6eec70039a02a4859acdff34e82. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZHNB2403150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8451aa699553cb3b7fe4cb9662f635c97fea135370920cf582ecb59547891ed3. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZHNB2403119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa810c07615753eb80ccd991ce11feaba609d5659f5f497745e3c28a5549fe3d1. 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/QZHNB2403120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d68bbd5492a88bb2018245aa44a117c52d73d50b931f2d42a398ad255d85b8b. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZHNB2403121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd084a1f4ab01580b35aaf738ade7d0bad4a015e8275f7d8b21ac7ca7f59fb0f5. 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/QZHNB2403122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397e2539a5e2c7fa6d8085e09c80cd022a6a56e4cda568cad94515d256690b05. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZHNB2403123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4abe7c0a8e9cae0f52ab19ec5b59765966cf5a9952be1ead47e3421a77006b0. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZHNB2403124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308565db5823460c04ff85fb25a4770c2b4230fef0e6275bbbb6202a339f5403. 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/QZK6P2402762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d20ae0d6e0e46337d6724cbdc0712091894e6b63faa2b43cc0faed2aca7d08. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZK6P2402764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4a26bdf14a5d781e3625f4844f0cccd62816a08636e67f6145ce565d4646c1. 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/QZK6P2402765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82205f53c1e90e0dfbc80359c7182fc0b9ccc8c9d6835df2feba5a7b0abf08b9. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZK6P2402767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cf070f416f9304548a1f0fa88f43849070147f26eae075d5170395cc105a3c. 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/QZK6P2402768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab4d4ea1c07882b8151dde902a834f526c57979a045efc444566260150d9ece. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZK6J2466912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac174296ffd9f8dd85ac2fae5498eac3b4abb9b77b49b7e1b815612c97761da1. 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/QZNWS2419405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8738f8b4219faa2ae13046ba73990f96529850ca46acf8196c8d10a15e6ffb99. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZNWS2419406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e3cd4661e571b497966904a5189a483c20c9176f761db143f805a416501dc8. 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/QZNWS2419409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987a227bfd3c6b659ba8bbba01da2ea02bae46742e11a5f6b7f480e6eb4f3bde. 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/QZNWS2419410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1ed7c8ad277259a831632daff82c7a8f2695ea2240dea12ca7e3ff7a56fac1. 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/QZNWS2419412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52be2f34749beebe3c8279ef83e70a5ee03e66657cc3b15f4d4a1ba3f17d9b3e. 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/QZNWS2419413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a38fb80f2fa14a8566fc6ebd701357063640ad0d5a3bc3f60209b061e613af. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZTB52432948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb726d69d89831c2594b1640fc45e47b54a1b5cce692852e5a4d374189c02d212. 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/QZTB52432949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d3865821b6cf69dd01474572481d89ec3b3432db211256bb2307e62fb5b31f. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZTB52432951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de74ed3945edec4e1a175373b603a4ff5f8bcc5f340b1c9455d71508a31b6d9. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZTB52432952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687f218906feffa4d92ad62fc3eaff95ce6e25d44bdfb494cf8b087372d936f6. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/QZTB52432953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f38bfbefa7b9e051f3de67d7ee85871e17c465d811a7430fd8db4e8871ff2a. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZTB52432954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d842d1c44b24a1199d61229f28c7c5f71fa009e9df098421a63237b8e22272. 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/QZTB52432955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307b253403c3cb379d475a7ed7751c7ec92fde529aa45a9479dc57bffac184b3. 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/QZTB52432956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb7ca1b5fc2b9a3129a2c3d9796defa988d981bf6a6efeb35a45d39be561c49. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZTBA2402434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36797b837e3e8facf8159518e9cd7309628c766be26b75dfa1ae4fe798709b9b. 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/QZTBA2402436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ea323c813e12e602e9020ded1518ca507e240b207626cbc3d64af968cd97fb. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZTBA2402437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f1b6b2216e5f17a589e38ab1cf008f542dd36531cbd8e89e9994d8e51027e3. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZTBF2437913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fcd70c321b53b20ef6cf467a4a74c8dd90d407f9d3694d385b49b09c380908. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/QZZ4J2401726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60adfa156e7e1ad469e564b47d33bb2a5ab46173c79456913c02e4cbfde90c0d. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZZ4J2401750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8340d73c9377493a2ea290f72167d0fd78a44be3c3389353fbf8dcff2c5031ae. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZZ4J2401818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043d3b8db5e436133be23d05be4ac3e834336e7d5e51dabde1802b4c59bfafe0. 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/QZZ4J2401824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6e989f020315a4076b26f34c5ae72010293148331abafd4c328a7bc05ca828. 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/QZZ4J2401825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470fc75fb72abacf687c26f23bf019103196578498d7630931ca6bccc9aed995. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZZ4J2401826.