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 0x91cca64d0dd03662b1740b45dc2caa9db9d88b25a5df6765f1bf305c5d3cee00. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90daf002-5786-40d3-af92-aee7c6b0a96f.json and https://artists.proofprofile.net/proofs/artist/90daf002-5786-40d3-af92-aee7c6b0a96f.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 0x085e85d089ea80050737fffadbadf976f8137c17e4f7c8b9f7eb6b39ff168888. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZHNB2442689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e61bd0185df4c2c13b1a044625939226959aea3ea3ea5a41656fbbaf0913c12. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZNWT2497716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457512be8fb8b675a121a2f2436e7de613e9e10015b0300da0e774b8f7a3570c. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTAT2446628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc765eb22e9256bf02ed8b3539f960af8bfe11d248078e660738bb7d08579b80. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTAT2406567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef76e13fd2a261b27e7b32a097ff130d70ef0acd7801ff598417419d3ee2843. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZTB42409528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1092e58fcf6e18139e2ac3eef01d9a15c21845b91996c8f3dc37bdf4738ac923. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZWFX2420495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1df0f93c7ba95940183de96c7d23b6fbfd5c47ff4e3d981fd5c23e207e085f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFZ22518247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65aacf44b6d9c0c00f50c1b05395e8e3727fd0fe85b2d5806bbc5852260fc5a1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDA42540731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1522b2a1ef9e8b1bfde187e9e8a0c03ba93a489c3ef470bd2291e151d4be00. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:00:22Z), 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/QZDA42590070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c07e6248177cb58daab3c58ccd38ca9e4ef033a469313f77b6653c8d7507297. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZDA72545367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a52560bf6569161d5b3bb644d9f068e3d4fea69c86a9870f5ed79dcfd94bc1. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZDA72545368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5603587286c7afda1f866aa7a1a4a342ce38261a7efa8bfb5c47c9d817369166. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:58:14Z), 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/QZDA72545369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57979721efb00edf63235dcc0da59f95ec59f4350060b6699e326bbdd8fdbc50. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:55:38Z), 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/QZES82588459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df0dac7fe8bd61fd8ec204603fa7f7b95207125aae946d141625efe5688b01d. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:37:08Z), 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/QZES92515404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4590633f10382464e76b3638c78f51139d5e1b132ad897597166cc1649b47fb4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN42561133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45053d57405f685745c4152530c194c3c686c75798cb7e0f8f3adb6a36a92cb6. 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/QZNWX2554943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a94de03120ecc70681328400e939d21e561ac337a453321f1841d3a46020a2c. 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/QZWFS2543672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a80e89aaebf31ee547e1095f44c6e0f75da9f76d28825c4ac1832faa04b0acb. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZWFS2547266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89895dad0bf2dc68a1c0848f1200682345bd86275f0c6e2d8a0c0778d09d0311. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFV2527426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15a994d45d7ff90cef378bcf0a31348331576105980b4e06197d36743e11db3. 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/QZZ772532558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e8aebf9b15089e4d2eb37d4f376e75a6b6535f5a116356ab269e856aaaed05. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:12:41Z), 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/QZZ772584365.