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 0x9513a8184be384f9b69891fb5df50a1db3d84fc91cd31068e54131d9410055a8. 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/efa58399-2809-4e6c-9cf8-dc07c7d6ec2e.json and https://artists.proofprofile.net/proofs/artist/efa58399-2809-4e6c-9cf8-dc07c7d6ec2e.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 0x05e89d95e24be94721fc589d75c3505a6192a954bd35997e2c9ecdb6f18d516d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QMBZ91955103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fceb9c70d1e03cb404cb31490c4b46b16192bb60cbf68e493ef295b209092c. 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/QM4TW2059604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c546400aa4afda468b6a017490d301f85a051a81007886cbfdd8e90b4c76e6. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/ARF102000123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fceb9c70d1e03cb404cb31490c4b46b16192bb60cbf68e493ef295b209092c. 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/QM4TW2059604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49ce401fc17ee885b259fe9e3a7b07f047c3afb9c697cb74a4a04fc56f42064. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QMFME1952271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bd36757bc4d1adeec7acc8243ac7f8021dbb10eefe8ea6a7ac7d7769d599e1. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/ARF102100099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31699c692dc40706051488b87fb7698d6d79fddedf10db87816086a72cd91f5. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/ARF102100323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c76e5324611e19990aceacd5a8e6ad6dba5b2ce8e84d73864adb6d3ea467323. 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/ARF102100325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31d9669a35b1e0240774151536b54ec7d9d1d8d5b777d3e5ca95b7353b357d2. 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/ARF102100282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5261b53c2ca7bb2b7924a9b4200b93d76ebdff3355d8857f181603eacfb3bae6. 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/ARF102100153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a195f0fe976d305d915949f5262eaa49fa0b8e0b2dddb30943d8fcdecd9ba5b. 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/ARF102100327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc032526efbf3797fc917e4209acb68613f4fcac2965930eec39eeaa090ffe2b. 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/ARF102200343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53b789c737836a63d6766a38667668bd26c4e5f927cb9d80db77a39e5e7b6c3. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/ARF102300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e89ef40fef4b786346cbc06d046a0195ed526dfd913eb89de7463180e6654d2. 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/ARF102300289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53b789c737836a63d6766a38667668bd26c4e5f927cb9d80db77a39e5e7b6c3. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ARF102300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867dc86cc38584456120aa5a8c4fc3145484388892b4a278d4d52f7b1daf807b. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/ARF102300295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc032526efbf3797fc917e4209acb68613f4fcac2965930eec39eeaa090ffe2b. 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/ARF102200343.
Equilibrista - Acústico (feat. El Cofla)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8caabb3dcdba3a592495ac8b6758ed3dd045befd4948c7f462c37dfe4dd3d7cf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ARF102300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0e052daa6068ef5975d89bf56b1232d54c2f5bdff0eac0f4cb6b38a43a75e4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARF102300114.