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 0x2e693bd3a0d29f9420e92b58f4b08cb904a42989fd40a570cbc5c75963d36462. 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/73e9382a-990c-45a6-a7bf-0227b554ec30.json and https://artists.proofprofile.net/proofs/artist/73e9382a-990c-45a6-a7bf-0227b554ec30.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 0xb633335d715eb646c460c69f8cdcd763d9bc830d0e0cc3d5b5c04aef75fb3cbd. 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/FR8PU1900180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce421f2d14a265609dbd28a273325e5ebf215f962caa3b05ff3b5b9484b207f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR8PU1900400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf27dac60b038accfe7baf86d139af68b7fc0f1a026d04b89e590f892b4e337c. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/FR8PU1900420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ecacbf7682706488c7c8e221b11420c7f14ff6235ab844fe28ac77d5ea2b33f. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:55:18Z), 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/FR9W12102504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63046e4d83b8c7acc44aaae490edee328eaff2ca2a26babbf3b651083c65430b. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/FR9W12101283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa80fc25c3828b8a917d68eeb9a6bdca0427e1d444e4a2bf3ea310c9f07dfe81. 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/FR9W12101284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf185d4e19c002470ffccd8b1b7db7d2ec1df8153a7389f14edafa3de4d3eef94. 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/FR9W12235433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4373c444d6cf0d431149b1e1548357beedd6f7e3dfc46bcc5d128b8f5e13cdaa. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:02:39Z), 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/FR9W12134084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ef6c89f7a749b779a7a84636cd93751eca57c4ba0db860e91c92c1d7065601. 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/FR9W12235424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80c84ba4bb771c98cc6ab090bb34825878fb90c8fc3230e5434a94e2fa49154. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:14:48Z), 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/FR9W12235432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4f3bcafb93f9d14b3d05f3e6f0bef8fac61a00ebe8e5ddd3f98ecab11cb6c8. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:26:50Z), 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/FR9W12235427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc2aaabe3126d5248b7355684fb31b7a97bc641304d17d4ab82589342380240. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:37:15Z), 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/FR9W12235426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c13e857884e384085bc81196d745ba735783c472529fed525961e3832ebe834. 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/FR9W12235423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72ce768e47ba882ca850aba2fbb6c7b26dd44b3d484d4c382d18b0aa2487f92. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR9W12235429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5154498e9e4f83481c7d33179f10e464a39061283345a8e06c1bcc7fabe004. 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/FRDIX2400090.