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 0x578c5f445ca9f27ce8cea1c1618844a309047d14e36bdb99598f692fae6070fa. 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/7d6cde2e-8020-4201-a291-863f8791d118.json and https://artists.proofprofile.net/proofs/artist/7d6cde2e-8020-4201-a291-863f8791d118.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 0x4e05ce632c3f4a921c60fae7eec8541373e287640222c63646c1e54bfe856057. 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/USA2P2356828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1392f7373b571909ff9ee8b9eab5c03fbac681b68a9e7a1958800db906d12f84. 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/QZWFK2357808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e8ce26a62a4ad6e4148d575bafa11807c94938dae05efab86dad5332291fe3. 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/QZWFK2357810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf056aa0e1c0e052c0c636ce39f09d5d67c07b201e97f62de2a2378f0cb7822a9. 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/QZWFK2357811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6bdd8626cf1d4fcc79363bec19d740c01e0581611d34179f929e8a19e227792. 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/QZWFK2357812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487fa4fbc1a711eb7c413a62090f6df69cd16719382a62b2cf10f8871afcf63a. 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/QZWFG2421946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298be4618ca81b4ced0c24cd9397970008c9a0e1e2917773db8d5c2f4d7d46cf. 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/QZWFG2421947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1273a1b169ea19c33eba7ebc4f6c33b5452fefa79d7dbe1cd16842e97ab169d6. 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/QZWFG2421948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60146d81797da3d3676bbc1b8c7316431ef6403b7e041c4a82241f429a7f2597. 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/QZWFK2489656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa1ad28c8ce5bff387463ec363ed25dd7a8818449614f3808286244d7e6a6a2. 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/QZWFK2489657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eaae67375182dcc126b62c4f9f26e6de1bbfa6148229f654b11fad217d2c164. 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/QZWFK2489658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57437b7e44dad88c0f64987540a5e86f5bd3ea86a94501e869116a290f26afd. 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/QZWFK2489660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1a87e25dc0c640b7196b7a381c72dd2687b4ae707dc3fbdd593f413d2ae7fa. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZWFK2489661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8102f1561a904c3ae965884492c034b99a685b1e045e459c25f6ece30890089. 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/QZWFN2424048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcfcaa056769ce495dfee0069c21a6937e1873686a726433029c64df09287cd. 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/QZWFN2424049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4810d71bdedea781daff90588d05e944f55588d4a9cc14513f06e5b5654f1983. 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/QZWFN2424050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0e03f10b3aa3d5ea5fc78455cb5044b60a5d070d50a5a5f044494947508ce7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZWFN2424051.