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 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 0x64db4b5d952e50fda3260650f3154811be1aacf49bbe8685a88183fd43ca3968. 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/b7ba0320-3238-46df-bb93-20d33d254417.json and https://artists.proofprofile.net/proofs/artist/b7ba0320-3238-46df-bb93-20d33d254417.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 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 0x7d34b9304a0ff972b120c4ff5a59e99f41202959218128263426ff4171e8cb19. 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/SE6TI2024312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7513c25bed5957e30d7f91c7e91e468e7259d2cad852bce40daca9fcc8ba3b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/SE6A92131012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3109c0c91274e8a05218aaf2471b0c037b5217da75e94463638a51e9c937b25f. 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/SE6A92131013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031d6c122601f2be8cd5fa0218256af9bf522ac1a9c525427306a0768efd4249. 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/SE6A92131014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0a7b94ab499dd72549c80b68abdb1672e062c5a4aa630f4b51938385cc5b4b. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/SE5752122025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1139889e97b20d171d72e556ffd9273d40b1922d7b9ad932e85f343adeb22dce. 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/SE6SA2153659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3323216aaa464b007c126f349b1f287a5778683a8cd3622c9b565c536bc1f94b. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/SE6SA2188509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590bb0f0af7283962ff9273cb692d52a867990404321e9b77c271e29a75bd2a1. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/SE6SA2188511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d270e745a7fbacfb2cfcf4ed2503ccfc06b90261451a6eafe32d8754d955464. 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/SE6XY2144101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8466a2aac742e27fa1cd4b395bdc6af2172e6d21fd64d284180ef487d719c36c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/SE6XX2140603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7d29575f893fbed4c27bfcf53da1769175aab541cc86a92919d848b36c8721. 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/SE6XX2253279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa491d6bb5a7bf2b2497bbf2ecfd8fbb7daf75604ffd166c3573dc298a1481add. 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/SE62M2203777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667db2b0ac4b0673a734af7ccdb40cef768749a66ba973b5bd891927a7eb327c. 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/SE6XW2233392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd4b322d137f317d2ee9263cc592cd363cc966427fb934e6e338676f8034fda. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/SE62M2203780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7c6200ea355761d6663c0d000b01cf84a0684c52e06a1a0d222a1de14e67aa. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/SE62M2203782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac8757359edc3b6972066e6572685c92487a8b8bbf775ee13cce6c40c14b278. 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/SE6QE2301132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e6f9bb7be6a1557369f87d87a77695f4a65b7c1a05e8f9d711923260a6d6f6. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/SE6QE2332541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f288855ed62c24ea4d675f1387a8cda0d780eeedc219b7de926a36e2627b190. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/SE6TI2333726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc637272f798a9f7273c6f58a33d202f9f9c3cf3ca765a46a59d88ca04e6d91b3. 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/SE6TI2370676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb23b402462b3b777a3d8b4f31d2da88d6d87ff06db4a12112767607a320cb4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE5BU2492477.
Song of the Death for the Death - Extended Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2ee77d1ab767d53f81aa889825a2da68b511c0c874431da97aee711b05768f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE5BU2492478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26e6c6cca731b87da3f9cc9c360b96eaf6708ddc781bb8de5c7f3bd8ab6e0d3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE6HN2422825.