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 0x53099ed24dc243901a80f1801c407bab0b88a9686424c6c121f572e6fcdb22fe. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb1e19bb-aa87-49e1-90ae-4032e9126753.json and https://artists.proofprofile.net/proofs/artist/cb1e19bb-aa87-49e1-90ae-4032e9126753.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 0xf3080465940b97a1faf7d5e4e939a9e644c92a26a59fc778b39acb8d14bf2dfb. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:10:56Z), 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/BSMU10004428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abd7bedd4ba8353e675f2148e3388e9176a37510fbaa5ea0ff5e778dd2e2f20. 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/GBSMU0079221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c8a39c3b8a247ab1042aee92ab0f47b9f09d489a1fadb12f7fd3504e385709. 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/GX38U2204583.
Is There Still Anything That Love Can Do? Lofi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b0cfda865ecad8dc8c805f93abefb63d60f04f13e3aef11769610cc03ce0d5. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:27:55Z), 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/GX89G2261610.
Is There Still Anything That Love Can Do?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917f15b35ad68a7d94e151e6a49fa4ae1c71f5f43fb6c3f43398ad48f2be211f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:05:38Z), 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/GX8LD2218255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8773530a49772ff8ec956465acdaf07c900adf8117a334bdee9f9cadd713328. 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/GX8LD2237850.
Two Hundred Million Centimeter Long Blades Lofi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7a71fb1c6ab6a9500fcc7fb6cb0da4978eab30d0bc57ff3e233bec8068547b. 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/GX8LD2273739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab2e6d17af568a33110cf754a9cf87542c9632698bc087aba3eda053ef2d60c. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GX89G2344564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74485669c3cc4095583ac9c1c6a53fe1876ed568e0d876807c9aa9d6ff90cd9. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:34:56Z), 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/GX8LD2398652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb157e4514405256401cb3878ce28fa9e045e9e189b0dc9c54ff21ba30e5bee1. 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/USANG2297170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce53d1be31571a2b3e205a2f697c0af0ce9180daad5b60d06f810a5155cb65ca. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:43:13Z), 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/USANG2297169.
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
Call Your Name (From "Attack on Titan") but it's lofi hip hop
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c664c3b0851acf5a6b71641385db15c0fc96efda4e332eda1d43c6c2e91a143. 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/QM3DF2206488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12b933830d346d057d188e6efa0f2cbdee6bfbc33a698b52f22d5562cf22cfd. 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/QM3DF2221161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824648639e4bfa1bc43ffaba89ae32c72a27d98672e7b24a1b68bc9d85a2ae5c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM3DF2241769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0fbbb5b28d5cec3bd444aed05d5565125b00b247c2a81b88e9e8ab0ae564e2. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:30:00Z), 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/QM3DF2254467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6c05a14ba24d9101c38c79477436167edded0b86d3531bd03731b715856726. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QM3DF2262458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f742730b228840f8518f4c9a755f185f8af96553a3d3373f8d5bd2ff4b53021. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM3DF2265994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc748ec1a6d8a20223530dca6c73581e227ee4b23e2e66acdbbf5602d34ebdcf. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM3DF2273711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ba221ab2711e60ab25a4cbc8aec7940673551040f33b8faeb7bc0eb173e6f6. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QMANG2245194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90729cba11d3b036a77ef6199757ccd6e43f9dabdce299c1548330b784403970. 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/QMANG2341698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0c938bbb53f4d4f97ceef31a90287a889dcd6b55db0fa6e38c76b94b340971. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/US3DF2454770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39e4877d2ff005a070dafdc79005cec4d5982e853c3ea022ebbb2fd2f6b6d93. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USANG2491798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95697eb6e8f8b528c27044430a5ab76b88af3159e052f83f18d35d8992fb562. 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/US3DF2519109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29c882c6dab338cd4aee2026edf02887b563aaf953b458fb079985cd67d1c53. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:33:19Z), 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/US3DF2521963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb91c2183121d56e628f5947d3d2e0d657bc9a9303bb6eddd718967cceb09b58. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:42:40Z), 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/US3DF2534754.