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 0xa955498838252f3f0c95657142913ce0cd84b421318fda0cad7cdc071af98082. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d634245-1d0e-4350-92eb-bb33ce9407be.json and https://artists.proofprofile.net/proofs/artist/3d634245-1d0e-4350-92eb-bb33ce9407be.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 0xd40be4ac76ce2a5d3216af354d102ae6f9a4de1345192c77a7e16fa3d2923b5c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAEO1938057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402d8291896cd13e62a1e62ea3365fdfad3f00809ea86197e809603681ca71f5. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/TCAEO1938050.
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 0x096aba2c55bb2f386b4fd0b2aa5098195fc8670c79434aa9232ca056736d9864. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAGR2215870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b334ddfe0ee96569c4e2d287e135e44cda870d80d0592d99714ce04574562f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAGR2215887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb358e06203f644a18a1474260ac0a76c4d89815bfec55114e9084050b2344ec. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/TCAGR2215835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7645e611611ec67f38470f5a6e90d8054b713e4b9becb60009c4700d83c725f3. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TCAGR2215854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835d3354bbf0d360f0d25bb3c5f939baea61d3c724b0ea54af68dac183a9f3c3. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/TCAGR2215881.
Острым лезвием ножа (2021 Remastered Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cdf173d35c1eccaa86c83dd118654a22a1ad88a8a24d5361604f0ad28c9b58b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDY42119339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc805aad4331d514eb66c7d4c9cac455b8b5c4ff306213ebaba4c126be91d2397. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAEA1801375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d956de515bb727c4eedcce9558a68c05461f1b8f7a2c3234367b2e5566f3c34. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAEA1801377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e8c0212d81c82294db726d019ebfcc21958a48a80937b3cd42656952c38e7d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCAEA1801379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1791efa97606e3dfec79a17374a61fbe9f2d1b5f2beca54af03297a9290e88. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCAEA1801370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6b8803e7f64e1e59449530a122b5959281596d7ae80d8973e0a3b86628a71c. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/TCAEA1801373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaae08f5713886cff77beb4b5a250889cff9dcaadc8fda35c61505df32c01ce2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCADZ1874715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cbf84124b5c2dfd4155f27208ec00a0da5a2994a66b94f580620f1d66e020a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCADZ1874717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5701b7c6ca53f7a8b8f0f1f881690b097bbb1a1938c5783b4ea3508ba5561f43. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCADZ1874718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadc1da355db8a91cb9816bc154fa99c496731521034fe4b331ac33770ab758e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCADZ1874721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa11ed83809a740e606ca080f68f2713072024130694910394347bb5f85b99b0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAEA1801495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e625438880f5614714ba5fe92f6078a3ec35e9d5d5c683fdec0ff631038fe4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAEA1801496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150996d6e5590b2cb99e8b748f9d2956c130be59c98c08ad9d0ce2423033f1a4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAEA1801498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5206a76fd50a564cf7df57fa86e7692e3a44f19e2a49a45194ca7d96a8c816. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/TCAEA1801494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfe1e60a071caf36bc3bdcb218996f81c62a1804148a64ab66bef7cf902426d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TCAEA1801497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49e9c441b82397cb0b9e3e0154b9617bd087ff1f889efb58122ce2f2fbc5cbd. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/TCAES2005649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fb53912d7c2904bd2ee5c6153c7eabc7fe995f2107b941a1e058a4230d4f8e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCAES2005652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b88a1d24f64a93e77dcbfde6a8f6de3b7d6626f50174b39f42629d5dd909c2d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAES2005656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7642ad5e16b867edaf778ea96b66c42187c12b9fadfb1ef562314e0cf5ae4f4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAES2005659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0db642dc01337a7e21cb8d569ce905ffac7de828dbe517237fb956c03a04924. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAEA1811806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f8f8ff2f7aa850f3bd551d99ee9ad97e2ed9be3053f70e93c2371125e1a07e. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/TCAEA1811807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc6d8259230281fc62fca49520348ee7e8d2a58143a00951bd855246a42a5390. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCAEA1811810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9764424c64eab407d16911623f6cea89ecb96c25ffd7953d33ec71bf53fec40d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEA1814627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4708b492212bb4b7b55c52906d7b742d61f722e7795bc47c265632f5e3723d9e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAEA1814628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ac31ba59f2fc00d5b21e164225e18e0323e44bdbb0aa37d60840fa1b661192. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAEA1814629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447cb6cc80a211b4f981148363d13a5507172c3ef1baaa1695b0aa2d22a8c000. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TCAEA1814625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96320d94e3ec745cfa0756661b54f7bbba060d5bcb22995033c9f6e14f86e7e1. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/TCAEA1814630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533b3eaa9768bfafac057d15fdd328c257bd4294026dc4c4ff47d96cee326dae. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEA1814656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17954ebbb76f1e40055cf8eb1b912b4b60ded2a9f29b2fb41bf61e09cc392f9b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAEA1814657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b96958df4076a00084fc419baf383232aebbc2a07a0f12dcb2344846ee7cd8d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAEA1814658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041fd42b0c315fcc186a078db0953ee228347520e4b1f8053b9e979a2727e70f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCAEA1814662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e5e7bd88cfea41ae9307fdf64261d9c71dc8097e2b6d8ac9c9ef0f090585b8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAEA1814660.